06-25-2010 07:12 AM - edited 03-06-2019 11:45 AM
Hi team,
I was doing a fail-over testing for several sites for a customer.(dual CE router setup)
I have two routers 08R & 09R with following HSRP config.
with this configuration 08R is active & 09R is secondary.. all good
but when I shutdown the Serial link on active router(08R). both become active and standby unknown
they can ping each other, checked ARP table, all good.
also removed track statement on backup router (09R) but no joy...
put the debug on
Please advise.
08R#sh run int f0/0
ip address 10.58.0.29 255.255.255.0
standby 1 ip 10.58.0.30 <---hsrp ip
standby 1 priority 105<------------------- when s0/0/0 down, becomes 95
standby 1 preempt
standby 1 track Serial0/0/0.100
09R#sh run int f0/0
ip address 10.58.0.31 255.255.255.0
standby 1 ip 10.58.0.30
standby 1 priority 101 <-------
standby 1 preempt
standby 1 track Serial0/1/0:0.100<-----------also tracking its own serial interface (removed this as its not required but still not working)
Debug on 08R
-----------
Jun 25 08:51:33.554 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.29 Active pri 95 vIP 10.58.0.30 <---sending hellos with lower priority 95, no in pkts
Jun 25 08:51:36.554 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.29 Active pri 95 vIP 10.58.0.30
Jun 25 08:51:37.978 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.29 Active pri 95 vIP 10.58.0.30
Debug on 09R
--------------------
Jun 25 08:52:00.542 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.31 Active pri 101 vIP 10.58.0.30
Jun 25 08:52:00.542 GMT: HSRP: Fa0/0 Grp 1 Hello in 10.58.0.29 Active pri 95 vIP 10.58.0.30
Jun 25 08:52:00.542 GMT: HSRP: Fa0/0 Grp 1 Coup out 10.58.0.31 Active pri 101 vIP 10.58.0.30
Jun 25 08:52:00.542 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.31 Active pri 101 vIP 10.58.0.30
Jun 25 08:52:03.542 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.31 Active pri 101 vIP 10.58.0.30
Jun 25 08:52:03.542 GMT: HSRP: Fa0/0 Grp 1 Hello in 10.58.0.29 Active pri 95 vIP 10.58.0.30
Jun 25 08:52:03.542 GMT: HSRP: Fa0/0 Grp 1 Coup out 10.58.0.31 Active pri 101 vIP 10.58.0.30
Jun 25 08:52:03.542 GMT: HSRP: Fa0/0 Grp 1 Hello out 10.58.0.31 Active pri 101 vIP 10.58.0.30
06-25-2010 08:41 AM
Doesn't look like device '08R' is recieving any hello's from '09R'
that's why they are both showing as active.
i would check the physical connection between the two routers ... plus any ACL's
Remember the hello's are multicast packets so check if multicast is being filtered.
hope that helps,
N
06-25-2010 09:07 AM
1.They both work fine when the tracked interface Serial0/0/0 is up on 08R. (means 08R is active and 09R is standby)
--------------------------
8R#sh stand brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP
Fa0/0 1 105 P Active local 10.58.0.31 10.58.0.30 <------when 08R s0/0/0 is up up (s0/0/0 tracked)
2. when you shutdown the S0/0/0 , 08R becomes standby for a minute then both become active and standby is unknown.
---------------
08R# sh stand brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP
Fa0/0 1 95 P Active local unknown 10.58.0.30 <--------when 08R s0/0/0 admin down
If its due to ACLs they wont speak in first place so we can ignore this option?
Please advise
06-29-2010 04:34 AM
I assume that this routers connected on two different switches.Can you verify that they have L2 working connection between the switches.
Thanks
06-30-2010 04:47 AM
Layer 2 working fine(thats why they recognise each other's HSRP role(primary/secondary). all goes wrong after 1 minute from I shutdown tracked interface.
"standy use-bia" fixed the issue. but still dont understand what was the problem.
what causing HSRP to behave this way?(Layer 2 and layer connectivity there: arp table is ok, ping is fine between them via LAN. connected to same switch, does it matter if they connected to different switches?)
any thoughts?
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