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    Rozcestník

    Dotaz: DHCP server IPV4 i IPV6 - doporučení

    Beetljuice avatar 4.8.2020 15:30 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    DHCP server IPV4 i IPV6 - doporučení
    Přečteno: 916×
    Zdravím. Potřebuji zprovoznit na linuxové GW (Debian 10) DHCP server jak IPV4, tak i IPV6. Co by jste doporučili? Přemýšlím o DNSMASQ, nebo ISC DHCP server. Je potřeba tam mít i RADVD? Díky za tipy.
    Aj dont spík ÍÍngliš :-(

    Odpovědi

    5.8.2020 13:28 Petr Šobáň | skóre: 80 | blog: soban | Olomouc
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    Osobně bych použil to co je v distribuci jako server default (nevím co debian používá).

    Jinak potřebuješ něco co se bude starat o autokonfiguraci takže pokud to není součástí DHCP serveru - musíš použít externí SW.
    5.8.2020 15:30 Andrej | skóre: 51 | blog: Republic of Mordor
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    Je potřeba tam mít i RADVD?

    Je nutné tam mít RADV; to bezpodmínečně. Bez toho IPv6 přece neexistuje. Nikoliv ovšem RADVD; ten je jenom jedna z možností. RADV snadno zajistí systemd-networkd. Já osobně používám systemd-networkd pro RADV, protože pro mě nemá smysl mít oddělený jednoúčelový RADVD, když systemd-networkd má všechnu konfiguraci na jednom místě.

    Problém ale je, že systemd-networkd (man systemd.network) zatím implementuje jenom DHCPv4. Což je na houby, pokud jde o nějaké univerzální integrované řešení. Takže je to derivované řešení. Pro DHCPv6 používám ISC DHCP server. DHCPv4 zajistí systemd-networkd.

    Otázka ovšem je, jestli je potřeba mít DHCPv6. Ten rozhodně není povinný. Spousta klientských zařízení ho dodnes pořádně neumí. (Android, looking at ya!) Síť klidně může vesele fungovat bez něj.

    Beetljuice avatar 5.8.2020 15:57 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    Otázka ovšem je, jestli je potřeba mít DHCPv6
    Ano, bohužel DHCPv6 potřeba je.
    Chápu to správně, že tedy DHCPv4 přiděluješ pomocí konfigurace v /etc/systemd/network/? Ale nerozumím tomu, kde je nakonfigurované RADV pro DHCPv6, které je nakonfigurované v ISC DHCP serveru, jestliže není nainstalován např. RADVD??
    Aj dont spík ÍÍngliš :-(
    Beetljuice avatar 5.8.2020 16:18 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    Aha už to vidím, nějak jsem to přehlédl [IPV6PREFIXDELEGATION]
    Nemůžeš ukázat vzor konfigurace pro inspiraci?
    Aj dont spík ÍÍngliš :-(
    5.8.2020 19:51 Andrej | skóre: 51 | blog: Republic of Mordor
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení

    Vůbec nemám ponětí, jestli to mám správně. Takovéhle mám tři WiFi a fungují.

    [Match]
    MACAddress=[[censored: A]]  # Fake anyway, udev + man systemd.link
    
    [Link]
    MTUBytes=2312
    ARP=yes
    
    [Network]
    Description=Nahovno
    Address=[[censored: B]]:4::/64
    Address=10.79.4.1/24
    IPForward=yes
    IPv6AcceptRA=no
    IPv6PrefixDelegation=static
    IPv6ProxyNDP=no
    DHCP=no
    DHCPServer=yes
    IPv4ProxyARP=no
    IPv6DuplicateAddressDetection=0
    # Probably not needed.
    IPv6PrivacyExtensions=no
    
    [Address]
    Address=[[censored: B]]:4::/64
    # This *skips* DAD
    DuplicateAddressDetection=none
    # Probably not needed.
    ManageTemporaryAddress=no
    
    [IPv6Prefix]
    Prefix=[[censored: B]]:4::/64
    
    [IPv6PrefixDelegation]
    OtherInformation=true
    RouterLifetimeSec=86400
    DNS=[[censored: B]]:4::
    DNSLifetimeSec=86400
    
    [DHCPServer]
    EmitDNS=yes
    DNS=10.79.4.1
    EmitNTP=yes
    NTP=10.79.4.1
    EmitRouter=yes
    EmitTimezone=yes

    Na tohle pozor: OtherInformation=true Bez DHCPv6 by to mělo být nastavené na false. U toho nevím, jak má vypadat; na ISC DHCPD to mám zhruba takto:

    ddns-update-style interim;
    ddns-updates on;
    ddns-domainname "[[censored: C]]";
    ddns-rev-domainname "ip6.arpa";
    allow client-updates;
    update-conflict-detection false;
    update-optimization false;
    authoritative;
    option domain-name-servers whoknowswhat.[[censored: C]];
    default-lease-time 86400;
    allow leasequery;
    
    key v6dhcpupdate {
            algorithm hmac-md5;
            secret "[[censored: H(ovnovole)]]";
    }
    
    zone h.a.l.b.d.e.r.o.s.n.e.c.ip6.arpa. {
            primary localhost;
            key v6dhcpupdate;
    }
    
    zone [[censored: C]]. {
            primary localhost;
            key v6dhcpupdate;
    }
    
    ### ... lots of subnets here ... ###
    
    subnet6 [[censored: B]]:4::/64 {
            option dhcp6.name-servers [[censored: B]]:4::;
            option dhcp6.sntp-servers [[censored: B]]:4::;
    }
    
    log-facility local7;
    

    Spoiler Alert: Aktualizace DNS záznamů do ISC BIND nefunguje a nikdy nefungovala. (Je to sračka, kterou už asi tak 10+ let nikdo neopravoval a neudržoval (kromě pár segfaultů) a už před těmi 10 lety nefungovala.) Takže tam to nastavení sice je, ale nemá vůbec žádný význam; nefunguje to. Stroje na síti (kromě Androidu, který DHCPv6 neumí) se tam poctivě hlásí, ale ničeho tím nedosáhnou, protože je to rozbité. (Jo, pak se jeden diví, proč někdo někde používá to proprietární Cisco. Tak. Proto.)

    Beetljuice avatar 6.8.2020 08:39 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    OK, díky!! Kouknu na to.
    Aj dont spík ÍÍngliš :-(
    Beetljuice avatar 4.9.2020 20:22 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    Tak jsem nakonec vybral DNSMASQ. Bohužel mám trochu problém se kterým si nevím rady. DNSMASQ v pohodě přiděluje IPV4 na ETH2 i VLAN20. Podle testování přidělí i funkční IPV6 na ETH2, ale na VLAN20 podle stejné konfigurace nic. Přijde mi, že má nějaký duševní problém s tou VLANou.
    Aj dont spík ÍÍngliš :-(
    7.9.2020 18:46 Andrej | skóre: 51 | blog: Republic of Mordor
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení

    Není to jenom nějaký detail kolem povolení NDP a ARP? Když se podíváš na sysctl -a a vygrepuješ název příslušných rozhraní, fyzických nebo virtuálních, je tam totéž?

    Beetljuice avatar 7.9.2020 20:20 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    No rozdíl tam je a ne malý ...
    net.ipv4.conf.eno2.accept_local = 0                           <
    net.ipv4.conf.eno2.accept_redirects = 1                       <
    net.ipv4.conf.eno2.accept_source_route = 1                    <
    net.ipv4.conf.eno2.arp_accept = 0                             <
    net.ipv4.conf.eno2.arp_announce = 0                           <
    net.ipv4.conf.eno2.arp_filter = 0                             <
    net.ipv4.conf.eno2.arp_ignore = 0                             <
    net.ipv4.conf.eno2.arp_notify = 0                             <
    net.ipv4.conf.eno2.bc_forwarding = 0                          <
    net.ipv4.conf.eno2.bootp_relay = 0                            <
    net.ipv4.conf.eno2.disable_policy = 0                         <
    net.ipv4.conf.eno2.disable_xfrm = 0                           <
    net.ipv4.conf.eno2.drop_gratuitous_arp = 0                    <
    net.ipv4.conf.eno2.drop_unicast_in_l2_multicast = 0           <
    net.ipv4.conf.eno2.force_igmp_version = 0                     <
    net.ipv4.conf.eno2.forwarding = 1                             <
    net.ipv4.conf.eno2.igmpv2_unsolicited_report_interval = 10000 <
    net.ipv4.conf.eno2.igmpv3_unsolicited_report_interval = 1000  <
    net.ipv4.conf.eno2.ignore_routes_with_linkdown = 0            <
    net.ipv4.conf.eno2.log_martians = 0                           <
    net.ipv4.conf.eno2.mc_forwarding = 0                          <
    net.ipv4.conf.eno2.medium_id = 0                              <
    net.ipv4.conf.eno2.promote_secondaries = 0                    <
    net.ipv4.conf.eno2.proxy_arp = 0                              <
    net.ipv4.conf.eno2.proxy_arp_pvlan = 0                        <
    net.ipv4.conf.eno2.route_localnet = 0                         <
    net.ipv4.conf.eno2.rp_filter = 1                              <
    net.ipv4.conf.eno2.secure_redirects = 1                       <
    net.ipv4.conf.eno2.send_redirects = 1                         <
    net.ipv4.conf.eno2.shared_media = 1                           <
    net.ipv4.conf.eno2.src_valid_mark = 0                         <
    net.ipv4.conf.eno2.tag = 0                                    <
    net.ipv4.neigh.eno2.anycast_delay = 100                       <
    net.ipv4.neigh.eno2.app_solicit = 0                           <
    net.ipv4.neigh.eno2.base_reachable_time_ms = 30000            <
    net.ipv4.neigh.eno2.delay_first_probe_time = 5                <
    net.ipv4.neigh.eno2.gc_stale_time = 60                        <
    net.ipv4.neigh.eno2.locktime = 100                            <
    net.ipv4.neigh.eno2.mcast_resolicit = 0                       <
    net.ipv4.neigh.eno2.mcast_solicit = 3                         <
    net.ipv4.neigh.eno2.proxy_delay = 80                          <
    net.ipv4.neigh.eno2.proxy_qlen = 64                           <
    net.ipv4.neigh.eno2.retrans_time_ms = 1000                    <
    net.ipv4.neigh.eno2.ucast_solicit = 3                         <
    net.ipv4.neigh.eno2.unres_qlen = 101                          <
    net.ipv4.neigh.eno2.unres_qlen_bytes = 212992                 <
    net.ipv6.conf.eno2.accept_dad = 1                             <
    net.ipv6.conf.eno2.accept_ra = 1                              <
    net.ipv6.conf.eno2.accept_ra_defrtr = 1                       <
    net.ipv6.conf.eno2.accept_ra_from_local = 0                   <
    net.ipv6.conf.eno2.accept_ra_min_hop_limit = 1                <
    net.ipv6.conf.eno2.accept_ra_mtu = 1                          <
    net.ipv6.conf.eno2.accept_ra_pinfo = 1                        <
    net.ipv6.conf.eno2.accept_ra_rt_info_max_plen = 0             <
    net.ipv6.conf.eno2.accept_ra_rt_info_min_plen = 0             <
    net.ipv6.conf.eno2.accept_ra_rtr_pref = 1                     <
    net.ipv6.conf.eno2.accept_redirects = 1                       <
    net.ipv6.conf.eno2.accept_source_route = 0                    <
    net.ipv6.conf.eno2.addr_gen_mode = 0                          <
    net.ipv6.conf.eno2.autoconf = 1                               <
    net.ipv6.conf.eno2.dad_transmits = 1                          <
    net.ipv6.conf.eno2.disable_ipv6 = 0                           <
    net.ipv6.conf.eno2.disable_policy = 0                         <
    net.ipv6.conf.eno2.drop_unicast_in_l2_multicast = 0           <
    net.ipv6.conf.eno2.drop_unsolicited_na = 0                    <
    net.ipv6.conf.eno2.enhanced_dad = 1                           <
    net.ipv6.conf.eno2.force_mld_version = 0                      <
    net.ipv6.conf.eno2.force_tllao = 0                            <
    net.ipv6.conf.eno2.forwarding = 1                             <
    net.ipv6.conf.eno2.hop_limit = 64                             <
    net.ipv6.conf.eno2.ignore_routes_with_linkdown = 0            <
    net.ipv6.conf.eno2.keep_addr_on_down = 0                      <
    net.ipv6.conf.eno2.max_addresses = 16                         <
    net.ipv6.conf.eno2.max_desync_factor = 600                    <
    net.ipv6.conf.eno2.mc_forwarding = 0                          <
    net.ipv6.conf.eno2.mldv1_unsolicited_report_interval = 10000  <
    net.ipv6.conf.eno2.mldv2_unsolicited_report_interval = 1000   <
    net.ipv6.conf.eno2.mtu = 1500                                 <
    net.ipv6.conf.eno2.ndisc_notify = 0                           <
    net.ipv6.conf.eno2.ndisc_tclass = 0                           <
    net.ipv6.conf.eno2.optimistic_dad = 0                         <
    net.ipv6.conf.eno2.proxy_ndp = 0                              <
    net.ipv6.conf.eno2.regen_max_retry = 3                        <
    net.ipv6.conf.eno2.router_probe_interval = 60                 <
    net.ipv6.conf.eno2.router_solicitation_delay = 1              <
    net.ipv6.conf.eno2.router_solicitation_interval = 4           <
    net.ipv6.conf.eno2.router_solicitation_max_interval = 3600    <
    net.ipv6.conf.eno2.router_solicitations = -1                  <
    net.ipv6.conf.eno2.seg6_enabled = 0                           <
    net.ipv6.conf.eno2.seg6_require_hmac = 0                      <
    net.ipv6.conf.eno2.suppress_frag_ndisc = 1                    <
    net.ipv6.conf.eno2.temp_prefered_lft = 86400                  <
    net.ipv6.conf.eno2.temp_valid_lft = 604800                    <
    net.ipv6.conf.eno2.use_oif_addrs_only = 0                     <
    net.ipv6.conf.eno2.use_optimistic = 0                         <
    net.ipv6.conf.eno2.use_tempaddr = 0                           <
    net.ipv6.neigh.eno2.anycast_delay = 100                       <
    net.ipv6.neigh.eno2.app_solicit = 0                           <
    net.ipv6.neigh.eno2.base_reachable_time_ms = 30000            <
    net.ipv6.neigh.eno2.delay_first_probe_time = 5                <
    net.ipv6.neigh.eno2.gc_stale_time = 60                        <
    net.ipv6.neigh.eno2.locktime = 0                              <
    net.ipv6.neigh.eno2.mcast_resolicit = 0                       <
    net.ipv6.neigh.eno2.mcast_solicit = 3                         <
    net.ipv6.neigh.eno2.proxy_delay = 80                          <
    net.ipv6.neigh.eno2.proxy_qlen = 64                           <
    net.ipv6.neigh.eno2.retrans_time_ms = 1000                    <
    net.ipv6.neigh.eno2.ucast_solicit = 3                         <
    net.ipv6.neigh.eno2.unres_qlen = 101                          <
    net.ipv6.neigh.eno2.unres_qlen_bytes = 212992                 <
    net.ipv4.conf.vlan20.accept_local = 0                           net.ipv4.conf.vlan20.accept_local = 0
    net.ipv4.conf.vlan20.accept_redirects = 1                       net.ipv4.conf.vlan20.accept_redirects = 1
    net.ipv4.conf.vlan20.accept_source_route = 1                    net.ipv4.conf.vlan20.accept_source_route = 1
    net.ipv4.conf.vlan20.arp_accept = 0                             net.ipv4.conf.vlan20.arp_accept = 0
    net.ipv4.conf.vlan20.arp_announce = 0                           net.ipv4.conf.vlan20.arp_announce = 0
    net.ipv4.conf.vlan20.arp_filter = 0                             net.ipv4.conf.vlan20.arp_filter = 0
    net.ipv4.conf.vlan20.arp_ignore = 0                             net.ipv4.conf.vlan20.arp_ignore = 0
    net.ipv4.conf.vlan20.arp_notify = 0                             net.ipv4.conf.vlan20.arp_notify = 0
    net.ipv4.conf.vlan20.bc_forwarding = 0                          net.ipv4.conf.vlan20.bc_forwarding = 0
    net.ipv4.conf.vlan20.bootp_relay = 0                            net.ipv4.conf.vlan20.bootp_relay = 0
    net.ipv4.conf.vlan20.disable_policy = 0                         net.ipv4.conf.vlan20.disable_policy = 0
    net.ipv4.conf.vlan20.disable_xfrm = 0                           net.ipv4.conf.vlan20.disable_xfrm = 0
    net.ipv4.conf.vlan20.drop_gratuitous_arp = 0                    net.ipv4.conf.vlan20.drop_gratuitous_arp = 0
    net.ipv4.conf.vlan20.drop_unicast_in_l2_multicast = 0           net.ipv4.conf.vlan20.drop_unicast_in_l2_multicast = 0
    net.ipv4.conf.vlan20.force_igmp_version = 0                     net.ipv4.conf.vlan20.force_igmp_version = 0
    net.ipv4.conf.vlan20.forwarding = 1                             net.ipv4.conf.vlan20.forwarding = 1
    net.ipv4.conf.vlan20.igmpv2_unsolicited_report_interval = 100   net.ipv4.conf.vlan20.igmpv2_unsolicited_report_interval = 100
    net.ipv4.conf.vlan20.igmpv3_unsolicited_report_interval = 100   net.ipv4.conf.vlan20.igmpv3_unsolicited_report_interval = 100
    net.ipv4.conf.vlan20.ignore_routes_with_linkdown = 0            net.ipv4.conf.vlan20.ignore_routes_with_linkdown = 0
    net.ipv4.conf.vlan20.log_martians = 0                           net.ipv4.conf.vlan20.log_martians = 0
    net.ipv4.conf.vlan20.mc_forwarding = 0                          net.ipv4.conf.vlan20.mc_forwarding = 0
    net.ipv4.conf.vlan20.medium_id = 0                              net.ipv4.conf.vlan20.medium_id = 0
    net.ipv4.conf.vlan20.promote_secondaries = 0                    net.ipv4.conf.vlan20.promote_secondaries = 0
    net.ipv4.conf.vlan20.proxy_arp = 0                              net.ipv4.conf.vlan20.proxy_arp = 0
    net.ipv4.conf.vlan20.proxy_arp_pvlan = 0                        net.ipv4.conf.vlan20.proxy_arp_pvlan = 0
    net.ipv4.conf.vlan20.route_localnet = 0                         net.ipv4.conf.vlan20.route_localnet = 0
    net.ipv4.conf.vlan20.rp_filter = 1                              net.ipv4.conf.vlan20.rp_filter = 1
    net.ipv4.conf.vlan20.secure_redirects = 1                       net.ipv4.conf.vlan20.secure_redirects = 1
    net.ipv4.conf.vlan20.send_redirects = 1                         net.ipv4.conf.vlan20.send_redirects = 1
    net.ipv4.conf.vlan20.shared_media = 1                           net.ipv4.conf.vlan20.shared_media = 1
    net.ipv4.conf.vlan20.src_valid_mark = 0                         net.ipv4.conf.vlan20.src_valid_mark = 0
    net.ipv4.conf.vlan20.tag = 0                                    net.ipv4.conf.vlan20.tag = 0
    net.ipv4.neigh.vlan20.anycast_delay = 100                       net.ipv4.neigh.vlan20.anycast_delay = 100
    net.ipv4.neigh.vlan20.app_solicit = 0                           net.ipv4.neigh.vlan20.app_solicit = 0
    net.ipv4.neigh.vlan20.base_reachable_time_ms = 30000            net.ipv4.neigh.vlan20.base_reachable_time_ms = 30000
    net.ipv4.neigh.vlan20.delay_first_probe_time = 5                net.ipv4.neigh.vlan20.delay_first_probe_time = 5
    net.ipv4.neigh.vlan20.gc_stale_time = 60                        net.ipv4.neigh.vlan20.gc_stale_time = 60
    net.ipv4.neigh.vlan20.locktime = 100                            net.ipv4.neigh.vlan20.locktime = 100
    net.ipv4.neigh.vlan20.mcast_resolicit = 0                       net.ipv4.neigh.vlan20.mcast_resolicit = 0
    net.ipv4.neigh.vlan20.mcast_solicit = 3                         net.ipv4.neigh.vlan20.mcast_solicit = 3
    net.ipv4.neigh.vlan20.proxy_delay = 80                          net.ipv4.neigh.vlan20.proxy_delay = 80
    net.ipv4.neigh.vlan20.proxy_qlen = 64                           net.ipv4.neigh.vlan20.proxy_qlen = 64
    net.ipv4.neigh.vlan20.retrans_time_ms = 1000                    net.ipv4.neigh.vlan20.retrans_time_ms = 1000
    net.ipv4.neigh.vlan20.ucast_solicit = 3                         net.ipv4.neigh.vlan20.ucast_solicit = 3
    net.ipv4.neigh.vlan20.unres_qlen = 101                          net.ipv4.neigh.vlan20.unres_qlen = 101
    net.ipv4.neigh.vlan20.unres_qlen_bytes = 212992                 net.ipv4.neigh.vlan20.unres_qlen_bytes = 212992
    net.ipv6.conf.vlan20.accept_dad = 1                             net.ipv6.conf.vlan20.accept_dad = 1
    net.ipv6.conf.vlan20.accept_ra = 1                              net.ipv6.conf.vlan20.accept_ra = 1
    net.ipv6.conf.vlan20.accept_ra_defrtr = 1                       net.ipv6.conf.vlan20.accept_ra_defrtr = 1
    net.ipv6.conf.vlan20.accept_ra_from_local = 0                   net.ipv6.conf.vlan20.accept_ra_from_local = 0
    net.ipv6.conf.vlan20.accept_ra_min_hop_limit = 1                net.ipv6.conf.vlan20.accept_ra_min_hop_limit = 1
    net.ipv6.conf.vlan20.accept_ra_mtu = 1                          net.ipv6.conf.vlan20.accept_ra_mtu = 1
    net.ipv6.conf.vlan20.accept_ra_pinfo = 1                        net.ipv6.conf.vlan20.accept_ra_pinfo = 1
    net.ipv6.conf.vlan20.accept_ra_rt_info_max_plen = 0             net.ipv6.conf.vlan20.accept_ra_rt_info_max_plen = 0
    net.ipv6.conf.vlan20.accept_ra_rt_info_min_plen = 0             net.ipv6.conf.vlan20.accept_ra_rt_info_min_plen = 0
    net.ipv6.conf.vlan20.accept_ra_rtr_pref = 1                     net.ipv6.conf.vlan20.accept_ra_rtr_pref = 1
    net.ipv6.conf.vlan20.accept_redirects = 1                       net.ipv6.conf.vlan20.accept_redirects = 1
    net.ipv6.conf.vlan20.accept_source_route = 0                    net.ipv6.conf.vlan20.accept_source_route = 0
    net.ipv6.conf.vlan20.addr_gen_mode = 0                          net.ipv6.conf.vlan20.addr_gen_mode = 0
    net.ipv6.conf.vlan20.autoconf = 0                               net.ipv6.conf.vlan20.autoconf = 0
    net.ipv6.conf.vlan20.dad_transmits = 1                          net.ipv6.conf.vlan20.dad_transmits = 1
    net.ipv6.conf.vlan20.disable_ipv6 = 0                           net.ipv6.conf.vlan20.disable_ipv6 = 0
    net.ipv6.conf.vlan20.disable_policy = 0                         net.ipv6.conf.vlan20.disable_policy = 0
    net.ipv6.conf.vlan20.drop_unicast_in_l2_multicast = 0           net.ipv6.conf.vlan20.drop_unicast_in_l2_multicast = 0
    net.ipv6.conf.vlan20.drop_unsolicited_na = 0                    net.ipv6.conf.vlan20.drop_unsolicited_na = 0
    net.ipv6.conf.vlan20.enhanced_dad = 1                           net.ipv6.conf.vlan20.enhanced_dad = 1
    net.ipv6.conf.vlan20.force_mld_version = 0                      net.ipv6.conf.vlan20.force_mld_version = 0
    net.ipv6.conf.vlan20.force_tllao = 0                            net.ipv6.conf.vlan20.force_tllao = 0
    net.ipv6.conf.vlan20.forwarding = 1                             net.ipv6.conf.vlan20.forwarding = 1
    net.ipv6.conf.vlan20.hop_limit = 64                             net.ipv6.conf.vlan20.hop_limit = 64
    net.ipv6.conf.vlan20.ignore_routes_with_linkdown = 0            net.ipv6.conf.vlan20.ignore_routes_with_linkdown = 0
    net.ipv6.conf.vlan20.keep_addr_on_down = 0                      net.ipv6.conf.vlan20.keep_addr_on_down = 0
    net.ipv6.conf.vlan20.max_addresses = 16                         net.ipv6.conf.vlan20.max_addresses = 16
    net.ipv6.conf.vlan20.max_desync_factor = 600                    net.ipv6.conf.vlan20.max_desync_factor = 600
    net.ipv6.conf.vlan20.mc_forwarding = 0                          net.ipv6.conf.vlan20.mc_forwarding = 0
    net.ipv6.conf.vlan20.mldv1_unsolicited_report_interval = 1000   net.ipv6.conf.vlan20.mldv1_unsolicited_report_interval = 1000
    net.ipv6.conf.vlan20.mldv2_unsolicited_report_interval = 1000   net.ipv6.conf.vlan20.mldv2_unsolicited_report_interval = 1000
    net.ipv6.conf.vlan20.mtu = 1500                                 net.ipv6.conf.vlan20.mtu = 1500
    net.ipv6.conf.vlan20.ndisc_notify = 0                           net.ipv6.conf.vlan20.ndisc_notify = 0
    net.ipv6.conf.vlan20.ndisc_tclass = 0                           net.ipv6.conf.vlan20.ndisc_tclass = 0
    net.ipv6.conf.vlan20.optimistic_dad = 0                         net.ipv6.conf.vlan20.optimistic_dad = 0
    net.ipv6.conf.vlan20.proxy_ndp = 0                              net.ipv6.conf.vlan20.proxy_ndp = 0
    net.ipv6.conf.vlan20.regen_max_retry = 3                        net.ipv6.conf.vlan20.regen_max_retry = 3
    net.ipv6.conf.vlan20.router_probe_interval = 60                 net.ipv6.conf.vlan20.router_probe_interval = 60
    net.ipv6.conf.vlan20.router_solicitation_delay = 1              net.ipv6.conf.vlan20.router_solicitation_delay = 1
    net.ipv6.conf.vlan20.router_solicitation_interval = 4           net.ipv6.conf.vlan20.router_solicitation_interval = 4
    net.ipv6.conf.vlan20.router_solicitation_max_interval = 3600    net.ipv6.conf.vlan20.router_solicitation_max_interval = 3600
    net.ipv6.conf.vlan20.router_solicitations = -1                  net.ipv6.conf.vlan20.router_solicitations = -1
    net.ipv6.conf.vlan20.seg6_enabled = 0                           net.ipv6.conf.vlan20.seg6_enabled = 0
    net.ipv6.conf.vlan20.seg6_require_hmac = 0                      net.ipv6.conf.vlan20.seg6_require_hmac = 0
    net.ipv6.conf.vlan20.suppress_frag_ndisc = 1                    net.ipv6.conf.vlan20.suppress_frag_ndisc = 1
    net.ipv6.conf.vlan20.temp_prefered_lft = 86400                  net.ipv6.conf.vlan20.temp_prefered_lft = 86400
    net.ipv6.conf.vlan20.temp_valid_lft = 604800                    net.ipv6.conf.vlan20.temp_valid_lft = 604800
    net.ipv6.conf.vlan20.use_oif_addrs_only = 0                     net.ipv6.conf.vlan20.use_oif_addrs_only = 0
    net.ipv6.conf.vlan20.use_optimistic = 0                         net.ipv6.conf.vlan20.use_optimistic = 0
    net.ipv6.conf.vlan20.use_tempaddr = 0                           net.ipv6.conf.vlan20.use_tempaddr = 0
    net.ipv6.neigh.vlan20.anycast_delay = 100                       net.ipv6.neigh.vlan20.anycast_delay = 100
    net.ipv6.neigh.vlan20.app_solicit = 0                           net.ipv6.neigh.vlan20.app_solicit = 0
    net.ipv6.neigh.vlan20.base_reachable_time_ms = 30000            net.ipv6.neigh.vlan20.base_reachable_time_ms = 30000
    net.ipv6.neigh.vlan20.delay_first_probe_time = 5                net.ipv6.neigh.vlan20.delay_first_probe_time = 5
    net.ipv6.neigh.vlan20.gc_stale_time = 60                        net.ipv6.neigh.vlan20.gc_stale_time = 60
    net.ipv6.neigh.vlan20.locktime = 0                              net.ipv6.neigh.vlan20.locktime = 0
    net.ipv6.neigh.vlan20.mcast_resolicit = 0                       net.ipv6.neigh.vlan20.mcast_resolicit = 0
    net.ipv6.neigh.vlan20.mcast_solicit = 3                         net.ipv6.neigh.vlan20.mcast_solicit = 3
    net.ipv6.neigh.vlan20.proxy_delay = 80                          net.ipv6.neigh.vlan20.proxy_delay = 80
    net.ipv6.neigh.vlan20.proxy_qlen = 64                           net.ipv6.neigh.vlan20.proxy_qlen = 64
    net.ipv6.neigh.vlan20.retrans_time_ms = 1000                    net.ipv6.neigh.vlan20.retrans_time_ms = 1000
    net.ipv6.neigh.vlan20.ucast_solicit = 3                         net.ipv6.neigh.vlan20.ucast_solicit = 3
    net.ipv6.neigh.vlan20.unres_qlen = 101                          net.ipv6.neigh.vlan20.unres_qlen = 101
    net.ipv6.neigh.vlan20.unres_qlen_bytes = 212992                 net.ipv6.neigh.vlan20.unres_qlen_bytes = 212992
    net.ipv4.conf.eno2.accept_local = 0                           <
    net.ipv4.conf.eno2.accept_redirects = 1                       <
    net.ipv4.conf.eno2.accept_source_route = 1                    <
    net.ipv4.conf.eno2.arp_accept = 0                             <
    net.ipv4.conf.eno2.arp_announce = 0                           <
    net.ipv4.conf.eno2.arp_filter = 0                             <
    net.ipv4.conf.eno2.arp_ignore = 0                             <
    net.ipv4.conf.eno2.arp_notify = 0                             <
    net.ipv4.conf.eno2.bc_forwarding = 0                          <
    net.ipv4.conf.eno2.bootp_relay = 0                            <
    net.ipv4.conf.eno2.disable_policy = 0                         <
    net.ipv4.conf.eno2.disable_xfrm = 0                           <
    net.ipv4.conf.eno2.drop_gratuitous_arp = 0                    <
    net.ipv4.conf.eno2.drop_unicast_in_l2_multicast = 0           <
    net.ipv4.conf.eno2.force_igmp_version = 0                     <
    net.ipv4.conf.eno2.forwarding = 1                             <
    net.ipv4.conf.eno2.igmpv2_unsolicited_report_interval = 10000 <
    net.ipv4.conf.eno2.igmpv3_unsolicited_report_interval = 1000  <
    net.ipv4.conf.eno2.ignore_routes_with_linkdown = 0            <
    net.ipv4.conf.eno2.log_martians = 0                           <
    net.ipv4.conf.eno2.mc_forwarding = 0                          <
    net.ipv4.conf.eno2.medium_id = 0                              <
    net.ipv4.conf.eno2.promote_secondaries = 0                    <
    net.ipv4.conf.eno2.proxy_arp = 0                              <
    net.ipv4.conf.eno2.proxy_arp_pvlan = 0                        <
    net.ipv4.conf.eno2.route_localnet = 0                         <
    net.ipv4.conf.eno2.rp_filter = 1                              <
    net.ipv4.conf.eno2.secure_redirects = 1                       <
    net.ipv4.conf.eno2.send_redirects = 1                         <
    net.ipv4.conf.eno2.shared_media = 1                           <
    net.ipv4.conf.eno2.src_valid_mark = 0                         <
    net.ipv4.conf.eno2.tag = 0                                    <
    net.ipv4.neigh.eno2.anycast_delay = 100                       <
    net.ipv4.neigh.eno2.app_solicit = 0                           <
    net.ipv4.neigh.eno2.base_reachable_time_ms = 30000            <
    net.ipv4.neigh.eno2.delay_first_probe_time = 5                <
    net.ipv4.neigh.eno2.gc_stale_time = 60                        <
    net.ipv4.neigh.eno2.locktime = 100                            <
    net.ipv4.neigh.eno2.mcast_resolicit = 0                       <
    net.ipv4.neigh.eno2.mcast_solicit = 3                         <
    net.ipv4.neigh.eno2.proxy_delay = 80                          <
    net.ipv4.neigh.eno2.proxy_qlen = 64                           <
    net.ipv4.neigh.eno2.retrans_time_ms = 1000                    <
    net.ipv4.neigh.eno2.ucast_solicit = 3                         <
    net.ipv4.neigh.eno2.unres_qlen = 101                          <
    net.ipv4.neigh.eno2.unres_qlen_bytes = 212992                 <
    net.ipv6.conf.eno2.accept_dad = 1                             <
    net.ipv6.conf.eno2.accept_ra = 1                              <
    net.ipv6.conf.eno2.accept_ra_defrtr = 1                       <
    net.ipv6.conf.eno2.accept_ra_from_local = 0                   <
    net.ipv6.conf.eno2.accept_ra_min_hop_limit = 1                <
    net.ipv6.conf.eno2.accept_ra_mtu = 1                          <
    net.ipv6.conf.eno2.accept_ra_pinfo = 1                        <
    net.ipv6.conf.eno2.accept_ra_rt_info_max_plen = 0             <
    net.ipv6.conf.eno2.accept_ra_rt_info_min_plen = 0             <
    net.ipv6.conf.eno2.accept_ra_rtr_pref = 1                     <
    net.ipv6.conf.eno2.accept_redirects = 1                       <
    net.ipv6.conf.eno2.accept_source_route = 0                    <
    net.ipv6.conf.eno2.addr_gen_mode = 0                          <
    net.ipv6.conf.eno2.autoconf = 1                               <
    net.ipv6.conf.eno2.dad_transmits = 1                          <
    net.ipv6.conf.eno2.disable_ipv6 = 0                           <
    net.ipv6.conf.eno2.disable_policy = 0                         <
    net.ipv6.conf.eno2.drop_unicast_in_l2_multicast = 0           <
    net.ipv6.conf.eno2.drop_unsolicited_na = 0                    <
    net.ipv6.conf.eno2.enhanced_dad = 1                           <
    net.ipv6.conf.eno2.force_mld_version = 0                      <
    net.ipv6.conf.eno2.force_tllao = 0                            <
    net.ipv6.conf.eno2.forwarding = 1                             <
    net.ipv6.conf.eno2.hop_limit = 64                             <
    net.ipv6.conf.eno2.ignore_routes_with_linkdown = 0            <
    net.ipv6.conf.eno2.keep_addr_on_down = 0                      <
    net.ipv6.conf.eno2.max_addresses = 16                         <
    net.ipv6.conf.eno2.max_desync_factor = 600                    <
    net.ipv6.conf.eno2.mc_forwarding = 0                          <
    net.ipv6.conf.eno2.mldv1_unsolicited_report_interval = 10000  <
    net.ipv6.conf.eno2.mldv2_unsolicited_report_interval = 1000   <
    net.ipv6.conf.eno2.mtu = 1500                                 <
    net.ipv6.conf.eno2.ndisc_notify = 0                           <
    net.ipv6.conf.eno2.ndisc_tclass = 0                           <
    net.ipv6.conf.eno2.optimistic_dad = 0                         <
    net.ipv6.conf.eno2.proxy_ndp = 0                              <
    net.ipv6.conf.eno2.regen_max_retry = 3                        <
    net.ipv6.conf.eno2.router_probe_interval = 60                 <
    net.ipv6.conf.eno2.router_solicitation_delay = 1              <
    net.ipv6.conf.eno2.router_solicitation_interval = 4           <
    net.ipv6.conf.eno2.router_solicitation_max_interval = 3600    <
    net.ipv6.conf.eno2.router_solicitations = -1                  <
    net.ipv6.conf.eno2.seg6_enabled = 0                           <
    net.ipv6.conf.eno2.seg6_require_hmac = 0                      <
    net.ipv6.conf.eno2.suppress_frag_ndisc = 1                    <
    net.ipv6.conf.eno2.temp_prefered_lft = 86400                  <
    net.ipv6.conf.eno2.temp_valid_lft = 604800                    <
    net.ipv6.conf.eno2.use_oif_addrs_only = 0                     <
    net.ipv6.conf.eno2.use_optimistic = 0                         <
    net.ipv6.conf.eno2.use_tempaddr = 0                           <
    net.ipv6.neigh.eno2.anycast_delay = 100                       <
    net.ipv6.neigh.eno2.app_solicit = 0                           <
    net.ipv6.neigh.eno2.base_reachable_time_ms = 30000            <
    net.ipv6.neigh.eno2.delay_first_probe_time = 5                <
    net.ipv6.neigh.eno2.gc_stale_time = 60                        <
    net.ipv6.neigh.eno2.locktime = 0                              <
    net.ipv6.neigh.eno2.mcast_resolicit = 0                       <
    net.ipv6.neigh.eno2.mcast_solicit = 3                         <
    net.ipv6.neigh.eno2.proxy_delay = 80                          <
    net.ipv6.neigh.eno2.proxy_qlen = 64                           <
    net.ipv6.neigh.eno2.retrans_time_ms = 1000                    <
    net.ipv6.neigh.eno2.ucast_solicit = 3                         <
    net.ipv6.neigh.eno2.unres_qlen = 101                          <
    net.ipv6.neigh.eno2.unres_qlen_bytes = 212992                 <
    Aj dont spík ÍÍngliš :-(
    Beetljuice avatar 8.9.2020 08:28 Beetljuice | skóre: 26 | blog: BeetljuiceBlog | Bílina
    Rozbalit Rozbalit vše Re: DHCP server IPV4 i IPV6 - doporučení
    Omlouvám se, chybný výpis .... to je tak, když je člověk unavenej. Posílám nový. Jediný rozdíl vidím u VLAN20 ... net.ipv6.conf.vlan20.autoconf = 0
    net.ipv4.conf.eno2.accept_local = 0                           | net.ipv4.conf.vlan20.accept_local = 0
    net.ipv4.conf.eno2.accept_redirects = 1                       | net.ipv4.conf.vlan20.accept_redirects = 1
    net.ipv4.conf.eno2.accept_source_route = 1                    | net.ipv4.conf.vlan20.accept_source_route = 1
    net.ipv4.conf.eno2.arp_accept = 0                             | net.ipv4.conf.vlan20.arp_accept = 0
    net.ipv4.conf.eno2.arp_announce = 0                           | net.ipv4.conf.vlan20.arp_announce = 0
    net.ipv4.conf.eno2.arp_filter = 0                             | net.ipv4.conf.vlan20.arp_filter = 0
    net.ipv4.conf.eno2.arp_ignore = 0                             | net.ipv4.conf.vlan20.arp_ignore = 0
    net.ipv4.conf.eno2.arp_notify = 0                             | net.ipv4.conf.vlan20.arp_notify = 0
    net.ipv4.conf.eno2.bc_forwarding = 0                          | net.ipv4.conf.vlan20.bc_forwarding = 0
    net.ipv4.conf.eno2.bootp_relay = 0                            | net.ipv4.conf.vlan20.bootp_relay = 0
    net.ipv4.conf.eno2.disable_policy = 0                         | net.ipv4.conf.vlan20.disable_policy = 0
    net.ipv4.conf.eno2.disable_xfrm = 0                           | net.ipv4.conf.vlan20.disable_xfrm = 0
    net.ipv4.conf.eno2.drop_gratuitous_arp = 0                    | net.ipv4.conf.vlan20.drop_gratuitous_arp = 0
    net.ipv4.conf.eno2.drop_unicast_in_l2_multicast = 0           | net.ipv4.conf.vlan20.drop_unicast_in_l2_multicast = 0
    net.ipv4.conf.eno2.force_igmp_version = 0                     | net.ipv4.conf.vlan20.force_igmp_version = 0
    net.ipv4.conf.eno2.forwarding = 1                             | net.ipv4.conf.vlan20.forwarding = 1
    net.ipv4.conf.eno2.igmpv2_unsolicited_report_interval = 10000 | net.ipv4.conf.vlan20.igmpv2_unsolicited_report_interval = 100
    net.ipv4.conf.eno2.igmpv3_unsolicited_report_interval = 1000  | net.ipv4.conf.vlan20.igmpv3_unsolicited_report_interval = 100
    net.ipv4.conf.eno2.ignore_routes_with_linkdown = 0            | net.ipv4.conf.vlan20.ignore_routes_with_linkdown = 0
    net.ipv4.conf.eno2.log_martians = 0                           | net.ipv4.conf.vlan20.log_martians = 0
    net.ipv4.conf.eno2.mc_forwarding = 0                          | net.ipv4.conf.vlan20.mc_forwarding = 0
    net.ipv4.conf.eno2.medium_id = 0                              | net.ipv4.conf.vlan20.medium_id = 0
    net.ipv4.conf.eno2.promote_secondaries = 0                    | net.ipv4.conf.vlan20.promote_secondaries = 0
    net.ipv4.conf.eno2.proxy_arp = 0                              | net.ipv4.conf.vlan20.proxy_arp = 0
    net.ipv4.conf.eno2.proxy_arp_pvlan = 0                        | net.ipv4.conf.vlan20.proxy_arp_pvlan = 0
    net.ipv4.conf.eno2.route_localnet = 0                         | net.ipv4.conf.vlan20.route_localnet = 0
    net.ipv4.conf.eno2.rp_filter = 1                              | net.ipv4.conf.vlan20.rp_filter = 1
    net.ipv4.conf.eno2.secure_redirects = 1                       | net.ipv4.conf.vlan20.secure_redirects = 1
    net.ipv4.conf.eno2.send_redirects = 1                         | net.ipv4.conf.vlan20.send_redirects = 1
    net.ipv4.conf.eno2.shared_media = 1                           | net.ipv4.conf.vlan20.shared_media = 1
    net.ipv4.conf.eno2.src_valid_mark = 0                         | net.ipv4.conf.vlan20.src_valid_mark = 0
    net.ipv4.conf.eno2.tag = 0                                    | net.ipv4.conf.vlan20.tag = 0
    net.ipv4.neigh.eno2.anycast_delay = 100                       | net.ipv4.neigh.vlan20.anycast_delay = 100
    net.ipv4.neigh.eno2.app_solicit = 0                           | net.ipv4.neigh.vlan20.app_solicit = 0
    net.ipv4.neigh.eno2.base_reachable_time_ms = 30000            | net.ipv4.neigh.vlan20.base_reachable_time_ms = 30000
    net.ipv4.neigh.eno2.delay_first_probe_time = 5                | net.ipv4.neigh.vlan20.delay_first_probe_time = 5
    net.ipv4.neigh.eno2.gc_stale_time = 60                        | net.ipv4.neigh.vlan20.gc_stale_time = 60
    net.ipv4.neigh.eno2.locktime = 100                            | net.ipv4.neigh.vlan20.locktime = 100
    net.ipv4.neigh.eno2.mcast_resolicit = 0                       | net.ipv4.neigh.vlan20.mcast_resolicit = 0
    net.ipv4.neigh.eno2.mcast_solicit = 3                         | net.ipv4.neigh.vlan20.mcast_solicit = 3
    net.ipv4.neigh.eno2.proxy_delay = 80                          | net.ipv4.neigh.vlan20.proxy_delay = 80
    net.ipv4.neigh.eno2.proxy_qlen = 64                           | net.ipv4.neigh.vlan20.proxy_qlen = 64
    net.ipv4.neigh.eno2.retrans_time_ms = 1000                    | net.ipv4.neigh.vlan20.retrans_time_ms = 1000
    net.ipv4.neigh.eno2.ucast_solicit = 3                         | net.ipv4.neigh.vlan20.ucast_solicit = 3
    net.ipv4.neigh.eno2.unres_qlen = 101                          | net.ipv4.neigh.vlan20.unres_qlen = 101
    net.ipv4.neigh.eno2.unres_qlen_bytes = 212992                 | net.ipv4.neigh.vlan20.unres_qlen_bytes = 212992
    net.ipv6.conf.eno2.accept_dad = 1                             | net.ipv6.conf.vlan20.accept_dad = 1
    net.ipv6.conf.eno2.accept_ra = 1                              | net.ipv6.conf.vlan20.accept_ra = 1
    net.ipv6.conf.eno2.accept_ra_defrtr = 1                       | net.ipv6.conf.vlan20.accept_ra_defrtr = 1
    net.ipv6.conf.eno2.accept_ra_from_local = 0                   | net.ipv6.conf.vlan20.accept_ra_from_local = 0
    net.ipv6.conf.eno2.accept_ra_min_hop_limit = 1                | net.ipv6.conf.vlan20.accept_ra_min_hop_limit = 1
    net.ipv6.conf.eno2.accept_ra_mtu = 1                          | net.ipv6.conf.vlan20.accept_ra_mtu = 1
    net.ipv6.conf.eno2.accept_ra_pinfo = 1                        | net.ipv6.conf.vlan20.accept_ra_pinfo = 1
    net.ipv6.conf.eno2.accept_ra_rt_info_max_plen = 0             | net.ipv6.conf.vlan20.accept_ra_rt_info_max_plen = 0
    net.ipv6.conf.eno2.accept_ra_rt_info_min_plen = 0             | net.ipv6.conf.vlan20.accept_ra_rt_info_min_plen = 0
    net.ipv6.conf.eno2.accept_ra_rtr_pref = 1                     | net.ipv6.conf.vlan20.accept_ra_rtr_pref = 1
    net.ipv6.conf.eno2.accept_redirects = 1                       | net.ipv6.conf.vlan20.accept_redirects = 1
    net.ipv6.conf.eno2.accept_source_route = 0                    | net.ipv6.conf.vlan20.accept_source_route = 0
    net.ipv6.conf.eno2.addr_gen_mode = 0                          | net.ipv6.conf.vlan20.addr_gen_mode = 0
    net.ipv6.conf.eno2.autoconf = 1                               | net.ipv6.conf.vlan20.autoconf = 0
    net.ipv6.conf.eno2.dad_transmits = 1                          | net.ipv6.conf.vlan20.dad_transmits = 1
    net.ipv6.conf.eno2.disable_ipv6 = 0                           | net.ipv6.conf.vlan20.disable_ipv6 = 0
    net.ipv6.conf.eno2.disable_policy = 0                         | net.ipv6.conf.vlan20.disable_policy = 0
    net.ipv6.conf.eno2.drop_unicast_in_l2_multicast = 0           | net.ipv6.conf.vlan20.drop_unicast_in_l2_multicast = 0
    net.ipv6.conf.eno2.drop_unsolicited_na = 0                    | net.ipv6.conf.vlan20.drop_unsolicited_na = 0
    net.ipv6.conf.eno2.enhanced_dad = 1                           | net.ipv6.conf.vlan20.enhanced_dad = 1
    net.ipv6.conf.eno2.force_mld_version = 0                      | net.ipv6.conf.vlan20.force_mld_version = 0
    net.ipv6.conf.eno2.force_tllao = 0                            | net.ipv6.conf.vlan20.force_tllao = 0
    net.ipv6.conf.eno2.forwarding = 1                             | net.ipv6.conf.vlan20.forwarding = 1
    net.ipv6.conf.eno2.hop_limit = 64                             | net.ipv6.conf.vlan20.hop_limit = 64
    net.ipv6.conf.eno2.ignore_routes_with_linkdown = 0            | net.ipv6.conf.vlan20.ignore_routes_with_linkdown = 0
    net.ipv6.conf.eno2.keep_addr_on_down = 0                      | net.ipv6.conf.vlan20.keep_addr_on_down = 0
    net.ipv6.conf.eno2.max_addresses = 16                         | net.ipv6.conf.vlan20.max_addresses = 16
    net.ipv6.conf.eno2.max_desync_factor = 600                    | net.ipv6.conf.vlan20.max_desync_factor = 600
    net.ipv6.conf.eno2.mc_forwarding = 0                          | net.ipv6.conf.vlan20.mc_forwarding = 0
    net.ipv6.conf.eno2.mldv1_unsolicited_report_interval = 10000  | net.ipv6.conf.vlan20.mldv1_unsolicited_report_interval = 1000
    net.ipv6.conf.eno2.mldv2_unsolicited_report_interval = 1000   | net.ipv6.conf.vlan20.mldv2_unsolicited_report_interval = 1000
    net.ipv6.conf.eno2.mtu = 1500                                 | net.ipv6.conf.vlan20.mtu = 1500
    net.ipv6.conf.eno2.ndisc_notify = 0                           | net.ipv6.conf.vlan20.ndisc_notify = 0
    net.ipv6.conf.eno2.ndisc_tclass = 0                           | net.ipv6.conf.vlan20.ndisc_tclass = 0
    net.ipv6.conf.eno2.optimistic_dad = 0                         | net.ipv6.conf.vlan20.optimistic_dad = 0
    net.ipv6.conf.eno2.proxy_ndp = 0                              | net.ipv6.conf.vlan20.proxy_ndp = 0
    net.ipv6.conf.eno2.regen_max_retry = 3                        | net.ipv6.conf.vlan20.regen_max_retry = 3
    net.ipv6.conf.eno2.router_probe_interval = 60                 | net.ipv6.conf.vlan20.router_probe_interval = 60
    net.ipv6.conf.eno2.router_solicitation_delay = 1              | net.ipv6.conf.vlan20.router_solicitation_delay = 1
    net.ipv6.conf.eno2.router_solicitation_interval = 4           | net.ipv6.conf.vlan20.router_solicitation_interval = 4
    net.ipv6.conf.eno2.router_solicitation_max_interval = 3600    | net.ipv6.conf.vlan20.router_solicitation_max_interval = 3600
    net.ipv6.conf.eno2.router_solicitations = -1                  | net.ipv6.conf.vlan20.router_solicitations = -1
    net.ipv6.conf.eno2.seg6_enabled = 0                           | net.ipv6.conf.vlan20.seg6_enabled = 0
    net.ipv6.conf.eno2.seg6_require_hmac = 0                      | net.ipv6.conf.vlan20.seg6_require_hmac = 0
    net.ipv6.conf.eno2.suppress_frag_ndisc = 1                    | net.ipv6.conf.vlan20.suppress_frag_ndisc = 1
    net.ipv6.conf.eno2.temp_prefered_lft = 86400                  | net.ipv6.conf.vlan20.temp_prefered_lft = 86400
    net.ipv6.conf.eno2.temp_valid_lft = 604800                    | net.ipv6.conf.vlan20.temp_valid_lft = 604800
    net.ipv6.conf.eno2.use_oif_addrs_only = 0                     | net.ipv6.conf.vlan20.use_oif_addrs_only = 0
    net.ipv6.conf.eno2.use_optimistic = 0                         | net.ipv6.conf.vlan20.use_optimistic = 0
    net.ipv6.conf.eno2.use_tempaddr = 0                           | net.ipv6.conf.vlan20.use_tempaddr = 0
    net.ipv6.neigh.eno2.anycast_delay = 100                       | net.ipv6.neigh.vlan20.anycast_delay = 100
    net.ipv6.neigh.eno2.app_solicit = 0                           | net.ipv6.neigh.vlan20.app_solicit = 0
    net.ipv6.neigh.eno2.base_reachable_time_ms = 30000            | net.ipv6.neigh.vlan20.base_reachable_time_ms = 30000
    net.ipv6.neigh.eno2.delay_first_probe_time = 5                | net.ipv6.neigh.vlan20.delay_first_probe_time = 5
    net.ipv6.neigh.eno2.gc_stale_time = 60                        | net.ipv6.neigh.vlan20.gc_stale_time = 60
    net.ipv6.neigh.eno2.locktime = 0                              | net.ipv6.neigh.vlan20.locktime = 0
    net.ipv6.neigh.eno2.mcast_resolicit = 0                       | net.ipv6.neigh.vlan20.mcast_resolicit = 0
    net.ipv6.neigh.eno2.mcast_solicit = 3                         | net.ipv6.neigh.vlan20.mcast_solicit = 3
    net.ipv6.neigh.eno2.proxy_delay = 80                          | net.ipv6.neigh.vlan20.proxy_delay = 80
    net.ipv6.neigh.eno2.proxy_qlen = 64                           | net.ipv6.neigh.vlan20.proxy_qlen = 64
    net.ipv6.neigh.eno2.retrans_time_ms = 1000                    | net.ipv6.neigh.vlan20.retrans_time_ms = 1000
    net.ipv6.neigh.eno2.ucast_solicit = 3                         | net.ipv6.neigh.vlan20.ucast_solicit = 3
    net.ipv6.neigh.eno2.unres_qlen = 101                          | net.ipv6.neigh.vlan20.unres_qlen = 101
    net.ipv6.neigh.eno2.unres_qlen_bytes = 212992                 | net.ipv6.neigh.vlan20.unres_qlen_bytes = 212992
    Aj dont spík ÍÍngliš :-(

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