NX OS DHCPv6 Relay Agent Prefix Delegation works but no static routes are created
Hello, I observed the following behaviour of a Nexus 3172 PQ-XL with nx os 9.2.2: the device relays dhcpv6 packets towards a configured server and sends the answer to the client. Everything works as expected. In contrast the implementation of the dhcpv6 relay agent in ios and ios xe, it seems, that no static route is created when a packet containing an identity association for prefix delegation with a valid prefix is proceeded. Is this behavior a bug (or missing feature) or miss any configuration for the dhcpv6 relay agent?
Note: We are getting the devices "down range" from the N7K to use SLAAC for their /64 address assignment, however when the down range device does a PD request of the DHCP6 server, it gets assigned a /64 prefix. However, unlike the same operation on an ASR1001, the Prefix-Delegation does not seem to go into the static routing table nor is it redistributed via (in this case) OSFPv3.
Cisco Nexus Operating System (NX-OS) Software
Software BIOS: version 2.12.0 kickstart: version 6.2(24) system: version 6.2(24)
interface Vlan98 ip access-group CE-IPv4-inbound in ipv6 traffic-filter CE-IPv6-inbound in ip access-group CE-IPv4-outbound out ipv6 traffic-filter CE-IPv6-outbound out no ip redirects ip address 22.214.171.124/29 ipv6 address 2600:2100:112:1::feed:1/64 ipv6 link-local fe80::98:feed:1 ipv6 nd other-config-flag no ipv6 redirects ip ospf authentication message-digest ip ospf message-digest-key 1 md5 3 xxxxxxxxxxxxxxxx ip ospf cost 2000 ip ospf passive-interface ip router ospf 101 area 0.0.0.0 ospfv3 cost 2000 ospfv3 passive-interface ipv6 router ospfv3 101 area 0.0.0.0 ip dhcp relay address 126.96.36.199 ip dhcp relay information trusted ip dhcp smart-relay ipv6 dhcp relay address 2604:21c0::feed:200 description TOWER:: TowerTEST_HE2 Public Network no shutdown
For instance, the downrange device gets a valid IPv6 address on vlan98, and is assigned the prefix 2600:2100:112:82b::/64
The only route in the routing table within the above /48 is the 2600:2100:112 itself...
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When moving from OSPFv2 to OSPFv3, there are many changes in the format of the LSAs Type, but the most known changes are: IP prefix informations are no longer carried in Type-1 LSA and Type-2 LSA, new LSAs Type 8 and 9 are added to carry these prefixes.