HSRP IPv6 problem

sebastien3 · ‎04-28-2021

Hello,

I have a problem with HSRP version 2 with 2 routers.

If I unplug on R1 GE0/0/3 and GE0/1/7 the failover IPv6 2001:db8:a:66::254 does not switch to R2.

Here is the configuration of the two routers and the diagram

############### R2 ###############
track 1 interface GigabitEthernet0/0/0 line-protocol
!
track 2 interface GigabitEthernet0/1/0 line-protocol
!
track 10 interface GigabitEthernet0/0/3 line-protocol
!
track 11 interface GigabitEthernet0/1/7 line-protocol
!
interface Port-channel2
 description *** UPLINK WAN ***
 standby 2 ipv6 2001:db8:1:1:1:FFFF:FFFF:5/125
 standby 2 timers msec 150 msec 450
 standby 2 priority 200
 standby 2 preempt
 standby 2 authentication md5 key-chain HSRP
 standby 2 name WAN_IPv6
 standby 2 track 10 decrement 10
 standby 2 track 11 decrement 10
 negotiation auto
 ipv6 address 2001:db8:1:1:1:FFFF:FFFF:2/125
 ipv6 enable
 no ipv6 redirects
 no ipv6 unreachables
!
interface Port-channel20.101
 description *** LAN ***
 encapsulation dot1Q 101
 standby version 2
 standby 101 ipv6 2001:db8:a:66::254/64
 standby 101 timers msec 150 msec 450
 standby 101 priority 150
 standby 101 preempt
 standby 101 authentication md5 key-chain HSRP_101
 standby 101 name LAN-101_IPv6
 standby 101 track 1 decrement 30
 standby 101 track 2 decrement 30
 ipv6 address 2001:db8:a:66::2/64
 ipv6 enable
 no ipv6 redirects
 no ipv6 unreachables
!

############### R1 ###############
track 1 interface GigabitEthernet0/0/0 line-protocol
!
track 2 interface GigabitEthernet0/1/0 line-protocol
!
track 10 interface GigabitEthernet0/0/3 line-protocol
!
track 11 interface GigabitEthernet0/1/7 line-protocol
!
interface Port-channel1
 description *** UPLINK WAN ***
 standby version 2
 standby 2 ipv6 2001:db8:1:1:1:FFFF:FFFF:5/125
 standby 2 timers msec 150 msec 450
 standby 2 priority 120
 standby 2 preempt
 standby 2 authentication md5 key-chain HSRP
 standby 2 name WAN_IPv6
 standby 2 track 10 decrement 10
 standby 2 track 11 decrement 10
 negotiation auto
 ipv6 address 2001:db8:1:1:1:FFFF:FFFF:1/125
 ipv6 enable
 no ipv6 redirects
 no ipv6 unreachables
!
interface Port-channel10.101
 description *** LAN ***
 standby version 2
 standby 101 ipv6 2001:db8:a:66::254/64
 standby 101 timers msec 150 msec 450
 standby 101 preempt
 standby 101 authentication md5 key-chain HSRP_101
 standby 101 name LAN-101_IPv6
 standby 101 track 1 decrement 30
 standby 101 track 2 decrement 30
 ipv6 address 2001:db8:a:66::1/64
 ipv6 enable
 no ipv6 redirects
 no ipv6 unreachables
 !

What did I forget in my configuration ?

Thanks for your help !!

sebastien3 · ‎04-28-2021

I have an error on two routers :

-------- R2 
%IPV6_ND-4-DUPLICATE_OPTIMISTIC: Duplicate address FE80::5:73FF:FEA0:65 on Port-channel20.101

-------- R1
%IPV6_ND-4-DUPLICATE_OPTIMISTIC: Duplicate address FE80::5:73FF:FEA0:65 on Port-channel10.101

Seb Rupik · ‎04-29-2021

Hi there,

What is the output show standby on both routers.

Also, on R1 Po10.101 you have not specified the dot1q tag (101).

cheers,

Seb,

sebastien3 · ‎05-02-2021

Hello Seb,

Thank you for your reply. This is an error to copy/paste, the dot1q tag 101 is present.

I deleted all HSRP configuration and tried with VRRP. The configuration works perfectly !