HSRP did not work when it should have
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From: Jowan on 26 Jan 2010 08:37 Hi Guys, I have a strange issue on HSRP. Has anyone encountered such an issue before ? I had to shutdown the standby switch so I made sure all the vlans are active on the primary switch. On reboot of secondary switch, Vlan 23 below which was active on the primary switch went from Active to Init state and remained in that state till the secondary switch came back up. Actually there were 12 vlans out of which 4 got stuck in Init, the others remained active. I have truncated the config and am focusing only on the below 3 vlans which depict the whole scenario else mentioning all the 12 Vlans was making the whole explanation below too long. Do let me know if you need any more information. ------------------------------------------------------------------------- Before shutting down standby: ------------------------------------------------------------------------- C6509-01# sh standby brief P indicates configured to preempt. | Interface Grp Prio P State Active Standby Virtual IP Vl21 0 200 P Active local 10.65.33.253 10.65.33.254 Vl22 0 200 P Active local 10.65.34.253 10.65.34.254 Vl23 0 200 P Active local 10.65.50.3 10.65.50.1 ------------------------------------------------------------------------- When I shut down standby: ------------------------------------------------------------------------- C6509-01#sh standby brief P indicates configured to preempt. | Interface Grp Prio P State Active Standby Virtual IP Vl21 0 200 P Active local unknown 10.65.33.254 Vl22 0 200 P Active local unknown 10.65.34.254 Vl23 0 200 P Init unknown unknown 10.65.50.1 ------------------------------------------------------------------------- Configuration on active side: ------------------------------------------------------------------------- interface Vlan21 ip address 10.65.33.252 255.255.255.0 ip igmp snooping querier standby ip 10.65.33.254 standby priority 200 standby preempt ! interface Vlan22 ip address 10.65.34.252 255.255.255.0 standby ip 10.65.34.254 standby priority 200 standby preempt ! interface Vlan23 ip address 10.65.50.2 255.255.255.0 standby ip 10.65.50.1 standby priority 200 standby preempt ------------------------------------------------------------------------- Configuration on secondary switch ( which was rebooted ): ------------------------------------------------------------------------- interface Vlan21 ip address 10.65.33.253 255.255.255.0 ip igmp snooping querier standby ip 10.65.33.254 standby preempt ! interface Vlan22 ip address 10.65.34.253 255.255.255.0 standby ip 10.65.34.254 standby preempt ! interface Vlan23 ip address 10.65.50.3 255.255.255.0 standby ip 10.65.50.1 standby preempt
From: bod43 on 27 Jan 2010 12:35
On 26 Jan, 13:37, Jowan <jowa...(a)gmail.com> wrote: > Hi Guys, > > I have a strange issue on HSRP. Has anyone encountered such an issue > before ? I had to shutdown the standby switch so I made sure all the > vlans are active on the primary switch. On reboot of secondary switch, > Vlan 23 below which was active on the primary switch went from Active > to Init state and remained in that state till the secondary switch > came back up. > > Actually there were 12 vlans out of which 4 got stuck in Init, the > others remained active. I have truncated the config and am focusing > only on the below 3 vlans which depict the whole scenario else > mentioning all the 12 Vlans was making the whole explanation below too > long. Do let me know if you need any more information. > > ------------------------------------------------------------------------- > Before shutting down standby: > ------------------------------------------------------------------------- > > C6509-01# sh standby brief > P indicates configured to preempt. > | > Interface Grp Prio P State Active Standby > Virtual IP > Vl21 0 200 P Active local 10.65.33.253 > 10.65.33.254 > Vl22 0 200 P Active local 10.65.34.253 > 10.65.34.254 > Vl23 0 200 P Active local 10.65.50.3 > 10.65.50.1 > > ------------------------------------------------------------------------- > When I shut down standby: > ------------------------------------------------------------------------- > > C6509-01#sh standby brief > P indicates configured to preempt. > | > Interface Grp Prio P State Active Standby > Virtual IP > Vl21 0 200 P Active local unknown > 10.65.33.254 > Vl22 0 200 P Active local unknown > 10.65.34.254 > Vl23 0 200 P Init unknown unknown > 10.65.50.1 > > ------------------------------------------------------------------------- > Configuration on active side: > ------------------------------------------------------------------------- > > interface Vlan21 > ip address 10.65.33.252 255.255.255.0 > ip igmp snooping querier > standby ip 10.65.33.254 > standby priority 200 > standby preempt > ! > interface Vlan22 > ip address 10.65.34.252 255.255.255.0 > standby ip 10.65.34.254 > standby priority 200 > standby preempt > ! > interface Vlan23 > ip address 10.65.50.2 255.255.255.0 > standby ip 10.65.50.1 > standby priority 200 > standby preempt > > ------------------------------------------------------------------------- > Configuration on secondary switch ( which was rebooted ): > ------------------------------------------------------------------------- > > interface Vlan21 > ip address 10.65.33.253 255.255.255.0 > ip igmp snooping querier > standby ip 10.65.33.254 > standby preempt > ! > interface Vlan22 > ip address 10.65.34.253 255.255.255.0 > standby ip 10.65.34.254 > standby preempt > ! > interface Vlan23 > ip address 10.65.50.3 255.255.255.0 > standby ip 10.65.50.1 > standby preempt There is nothing wrong with the config. The only thing that springs to mind is that the VLAN 23 interface itself might be going down when you shutdown the "standby" switch since there are no active ports remaining in the Vlan. I forget the details but a Vlan with no active physical ports (i.e. up up) stops being a Vlan - state is not "active". sh vlan - check Vlan 23 is active sh int - check int vlan 23 is up up. Otherwise maybe a bug? http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094afd.shtml#top6 Mentions just such a bug that affects routers. Try shut/no shut of vlan 23 to see if that clears the problem. If so it's a bug. |