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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 32 IPv6 Support on the Cisco ASR 901 Router
How to Configure IPv6 Support on the Cisco ASR 901 Router
ND reachable time is 30000 milliseconds (using 30000)
ND RAs are suppressed (periodic)
Hosts use stateless autoconfig for addresses.
Verifying IPv6 Neighbor Discovery Configuration
To verify the IPv6 neighbor discovery configuration, use the show ipv6 neighbors command in
privileged EXEC mode, as shown in the example.
Router# show ipv6 neighbors detail
IPv6 Address TRLV Age Link-layer Addr State Interface
2001:103::2 0 0 001e.4a97.05bb REACH Vl103
2001:101::2 0 0 001e.4a97.05bb REACH Vl101
2001:300::2 0 72 001e.4a97.05bb STALE Vl300
2001:10::2 0 0 001e.4a97.05bb REACH Vl10
FE80::200:1FF:FE97:41FE 0 65 0000.0197.41fe STALE Vl90
FE80::21E:4AFF:FE97:5BB 0 25 001e.4a97.05bb STALE Vl101
FE80::21E:4AFF:FE97:5BB 0 0 001e.4a97.05bb REACH Vl10
FE80::21E:4AFF:FE97:5BB 0 0 001e.4a97.05bb REACH Vl170
FE80::21E:4AFF:FE97:5BB 0 0 001e.4a97.05bb STALE Vl160
2001:170::2 0 0 001e.4a97.05bb REACH Vl170
2001:180::2 0 0 001e.4a97.05bb REACH Vl180
2001:190::2 0 0 001e.4a97.05bb REACH Vl190
Verifying IPv6 and IPv4 Dual-Stack Configuration
To verify the IPv6 and IPv4 dual-stack configuration, use the show ipv6 interface or show ip interface
commands in privileged EXEC mode, as shown in the examples.
Router# show ipv6 interface loopback0
Loopback0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::4255:39FF:FE89:4831
No Virtual link-local address(es):
Global unicast address(es):
FE01:4::4, subnet is FE01:4::/64
Joined group address(es):
FF02::1
FF02::2
FF02::5
FF02::1:FF00:4
FF02::1:FF89:4831
MTU is 1514 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is not supported
ND reachable time is 30000 milliseconds (using 30000)
ND RAs are suppressed (periodic)
Hosts use stateless autoconfig for addresses.
Router# show ip interface
GigabitEthernet0/0 is down, line protocol is down
Inbound access list is not set
Outgoing access list is not set
Internet protocol processing disabled
GigabitEthernet0/1 is administratively down, line protocol is down