Core Network Services & IPv6 Andreas Taudte, Sales Engineer
Core Network Services & IPv6 (2013-06-05)
May 12, 2015
My Presentation for the IPv6 Congress in Frankfurt from the 6h to 7th of June 2013
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Core Network Services & IPv6Andreas Taudte, Sales Engineer
Netzwerkkerndienste
DNS DHCP
IPv6 Vorwärtsauflösung
• AAAA Record• Kürzungen der IPv6 Adresse erlaubt
ipv6-host IN AAAA 2001:DB8::1:2:345:6789ipv6-host IN AAAA 2001:DB8::1:2:345:6789
IPv6 Rückwärtsauflösung
• Zone ip6.arpa• Kürzungen der IPv6 Adresse nicht erlaubt
9.8.7.6.5.4.3.0.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.
IN PTR ipv6-host.bluecatnetworks.com.
9.8.7.6.5.4.3.0.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.
IN PTR ipv6-host.bluecatnetworks.com.
Pro InterfacePro Interface
Erforderliche Adressen eines IPv6-Hosts
Link-Local
Unicast
Loopback
All-Nodes Multicast
Solicited-Node
Multicast
FE80::61CC:B8CA:FCB2:36BEFE80::61CC:B8CA:FCB2:36BE
2001:db8:1C6E::6D2B:1C6E2001:db8:1C6E::6D2B:1C6E
::1::1
FF01::1FF01::1
FF02::1:FF2B:1C6EFF02::1:FF2B:1C6E
PTR Records im BlueCat Address Manager
DNS Planung: Das Problem
IPv4 = 192.168.191.3IPv6 = FE80::61CC:B8CA:FCB2:36BE
RessourceRessourceRessourceRessource
DNS ServerDNS ServerDNS ServerDNS ServerDNS QueryDNS Query
A/AAAAA/AAAA
Anfragevia IPv6Anfragevia IPv6
Anfragevia IPv4Anfragevia IPv4
DNS Planung: Die Lösung mit Search List
DNS ServerDNS ServerDNS ServerDNS ServerDHCP ServerDHCP ServerDHCP ServerDHCP Server
IPv4 (option-119) = bcnlab.corpIPv6 (option-24) = v6.bcnlab.corp
bcnlab.corpv6.bcnlab.corp
IPv4
IPv6
srv.bcnlab.corpsrv.bcnlab.corp
srv.v6.bcnlab.corpsrv.v6.bcnlab.corp
RessourceRessourceRessourceRessource
Anfragevia IPv4Anfragevia IPv4
Anfragevia IPv6Anfragevia IPv6
IPv4
IPv6
IPv6
Mechanismen zur Auto-Konfiguration
• Router Advertisement (RA)
Bitte Präfix sendenBitte Präfix senden
Subnetz-Präfix, TTL, FlagsSubnetz-Präfix, TTL, Flags
Src = link-local address (FE80::)Dst = all-routers multicast address (FF02::2)
Src = link-local address (FE80::)Dst = all-nodes multicast address (FF02::1)
Mechanismen zur Auto-Konfiguration
• Router Advertisement (RA)
Du bist in Netz2001:db8:cafe:1::/64
A, M, O
Du bist in Netz2001:db8:cafe:1::/64
A, M, O
Adressvergabe Optionsvergabe
A Flag SLAAC RFC 5006/6106
M Flag DHCPv6 DHCP
O Flag SLAAC DHCP
RFC 5006/6106
• Resolver Konfiguration via RA• RDNSS (Recursive DNS Server)• DNSSL (DNS Search List)
pc7640:~ andreas$ cat radvd.conf interface eth0 { AdvSendAdvert on; AdvOtherConfigFlag off; prefix 2001:db8:1:2::/64 {};
};
pc7640:~ andreas$ cat radvd.conf interface eth0 { AdvSendAdvert on; AdvOtherConfigFlag off; prefix 2001:db8:1:2::/64 {};
};
RDNSS 2001:db8:1:2::53 {}; DNSSL bluecatnetworks.com {};
RFC 5006/6106
ZentraleZentraleZentraleZentrale
Standort AStandort AStandort AStandort A
Standort BStandort BStandort BStandort B
Subnetz-Präfix & DNSSubnetz-Präfix & DNS
RFC 5006/6106: Notwendigkeit von Discovery
DHCPv6
• Motivation:• zentrale Kontrolle und
Nachvollziehbarkeit von verwendeten Adressen
subnet6 2001:db8:1:2::/64 {
# Range Clients range6 2001:db8:1:2::1:0 2001:db8:1:2::1:ffff;
# Standard Options option dhcp6.name-servers 2001:db8:1:2::1; option dhcp6.domain-search "bluecatnetworks.com"; }
subnet6 2001:db8:1:2::/64 {
# Range Clients range6 2001:db8:1:2::1:0 2001:db8:1:2::1:ffff;
# Standard Options option dhcp6.name-servers 2001:db8:1:2::1; option dhcp6.domain-search "bluecatnetworks.com"; }
DHCPv6 im BlueCat Address Manager
Präfix-Delegierung (RFC 3633)
ZentraleZentraleZentraleZentrale
Standort AStandort AStandort AStandort A
Standort BStandort BStandort BStandort B
2001:db8:cafe:1::/64 & DNS2001:db8:cafe:1::/64 & DNS
2001:db8:babe:1::/64 & DNS2001:db8:babe:1::/64 & DNS
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