R1
interface Ethernet0/0
no ip address
ipv6 address FC00:1:1:12::1/64
ipv6 address FC00:1:1:21::1/64
ipv6 nd prefix FC00:1:1:12::/64
ipv6 nd prefix FC00:1:1:21::/64 14400 14400
ipv6 nd ra lifetime 60
ipv6 nd ra interval 40
!
R2
interface Ethernet0/0
no ip address
ipv6 address autoconfig default
R1# sh ipv int eth0/0 pref
IPv6 Prefix Advertisements Ethernet0/0
Codes for 1st column:
A - Address, P - Prefix-Advertisement, O - Pool
U - Per-user prefix
Codes for 2nd column and above:
D - Default
N - Not advertised, C - Calendar
PD default [LA] Valid lifetime 2592000, preferred lifetime 604800
PAD FC00:1:1:12::/64 [LA] Valid lifetime 2592000, preferred lifetime 604800
PA FC00:1:1:21::/64 [LA] Valid lifetime 14400, preferred lifetime 14400
In the following example, the show ipv6 interface command is used to verify that IPv6 addresses are configured correctly for FastEthernet interface 0/0. Information may also be displayed about the status of IPv6 neighbor redirect messages, IPv6 neighbor discovery messages, stateless autoconfiguration, and MTU size.
R2# sh ipv6 int eth0/0
Ethernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::A8BB:CCFF:FE00:200
No Virtual link-local address(es):
Stateless address autoconfig enabled
Global unicast address(es):
FC00:1:1:12:A8BB:CCFF:FE00:200, subnet is FC00:1:1:12::/64 [EUI/CAL/PRE]
valid lifetime 2591991 preferred lifetime 604791
FC00:1:1:21:A8BB:CCFF:FE00:200, subnet is FC00:1:1:21::/64 [EUI/CAL/PRE]
valid lifetime 14391 preferred lifetime 14391
Joined group address(es):
FF02::1
FF02::1:FF00:200
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 30000)
ND NS retransmit interval is 1000 milliseconds
Default router is FE80::A8BB:CCFF:FE00:100 on Ethernet0/0
R2# sh ipv route
IPv6 Routing Table - default - 6 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO
ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
l - LISP
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
ND ::/0 [2/0]
via FE80::A8BB:CCFF:FE00:100, Ethernet0/0
NDp FC00:1:1:12::/64 [2/0]
via Ethernet0/0, directly connected
L FC00:1:1:12:A8BB:CCFF:FE00:200/128 [0/0]
via Ethernet0/0, receive
NDp FC00:1:1:21::/64 [2/0]
via Ethernet0/0, directly connected
L FC00:1:1:21:A8BB:CCFF:FE00:200/128 [0/0]
via Ethernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
The following example displays the state of the DRP preference value as advertised by other devices:
Device# show ipv6 routers
R2#sh ipv routers
Router FE80::A8BB:CCFF:FE00:100 on Ethernet0/0, last update 0 min
Hops 64, Lifetime 60 sec, AddrFlag=0, OtherFlag=0, MTU=1500
HomeAgentFlag=0, Preference=Medium
Reachable time 0 (unspecified), Retransmit time 0 (unspecified)
Prefix FC00:1:1:12::/64 onlink autoconfig
Valid lifetime 2592000, preferred lifetime 604800
Prefix FC00:1:1:21::/64 onlink autoconfig
Valid lifetime 14400, preferred lifetime 14400
R2#
