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Beginner

6500 HSRP failover

Hi Commnity,

We have two cisco 6500 swtiches. Switch A is a active state of HSRP and Switch B in stanby state, After 2 days we are going have go-live test for Switches failove redudancy.

Please see the sample HSRP confiuration for both switches

SWTICH A

interface Vlan 100
description << RECEPTION>>
ip address 10.1.2.254 255.255.255.0
ip route-cache flow
standby delay minimum 20 reload 25
standby 3 ip 10.1.2.1
standby 3 priority 110
standby 3 preempt delay minimum 380

SWITCH B

interface Vlan3
description << RECEPTION>>
ip address 10.1.2.253 255.255.255.0
ip route-cache flow
standby delay minimum 20 reload 25
standby 3 ip 10.1.2.1
standby 3 priority 95
standby 3 preempt delay minimum 380

SWITCH A# sh stanby brief

Interface   Grp      Prio      P     State        Active addr     Standby addr    Group addr

Vl3            3        110      P     Active       local              10.1.2.253        10.1.2.1

SWITCH B #

Interface   Grp      Prio      P     State        Active addr     Standby addr    Group addr

Vl3            3        95        P     Standby    local               local       10.1.2.1

If there is any misconfiguration, your sugesstion will be highly appreciated.

53 REPLIES 53
Hall of Fame Guru

Re: 6500 HSRP failover

Looks okay to me. Just remember there will be delays in failing over and failing back again because you have delay timers but it shoudl all work fine.

Jon

Beginner

Re: 6500 HSRP failover

Thanks for your reply.

You mean to say that it will take 380 seconds for standby to cover the failover.

Engager

Re: 6500 HSRP failover

it would be great if you set interface tracking on your uplinks to your core router/s. see helpful link below.

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094e8c.shtml

Beginner

Re: 6500 HSRP failover

Hi

For testing purpose I shut down vlan interface by using the command shut

but stanby switch was not able to take over.


output of sh stanby brief command on stanby switch

Vl19        19  95   P Active   local           unknown         10.1.18.1

output of sh stanby brief command on previously active swithc

Vl19        19  110  P Init     unknown         unknown         10.1.18.1

Please help me Why does it happen ?

Beginner

Re: 6500 HSRP failover

You may want to verify the two switches are linked together with layer 3..

Beginner

Re: 6500 HSRP failover

Yes. The two switches are connected to each other and it is trunk.

Beginner

Re: 6500 HSRP failover

Do you have any of the switchports set to Vlan 19 and a system connected to that port?

ie; switchport access vlan 19, switchport mode access

Sometimes the vlan does not come up completely if not.

Also, doing some HSRP debugs would probably give some clues..

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a91.shtml#enhanced

---Mike

Beginner

Re: 6500 HSRP failover

Yes I have systems to switchport and they are configrured in that vlan ie switcport access vlan 19.

however that vlan is up

The issue I am facing right now is

When I shutdown the vlan 19 and after doing that systems in this vlan cannot ping any other device but i can ping virtual ip

Hall of Fame Guru

Re: 6500 HSRP failover

samirshaikh52 wrote:

Hi

For testing purpose I shut down vlan interface by using the command shut

but stanby switch was not able to take over.


output of sh stanby brief command on stanby switch

Vl19        19  95   P Active   local           unknown         10.1.18.1

output of sh stanby brief command on previously active swithc

Vl19        19  110  P Init     unknown         unknown         10.1.18.1

Please help me Why does it happen ?

This output shows that it has worked ie.

the standby is active for that vlan and you get the "unknown" because you have shutdown the interface on the other switch.

This is exactly what you would expect to see so can you clarify exactly what problems you are having ?

Jon

Beginner

Re: 6500 HSRP failover

But presently I am facing this issue

After shuting down the vlan interface 19, the systems in this vlan cannot reach other device.However I can ping the vip from the system.

Beginner

Re: 6500 HSRP failover

Please try to help me I am trying to solve this issue last two

days.

Beginner

Re: 6500 HSRP failover

Another thing you may want to check is to make sure that vlan is included in the trunk between both switches and not pruned...

Beginner

Re: 6500 HSRP failover

I have double checked the vlan is included with the trunk and its not pruned.

Beginner

Re: 6500 HSRP failover

The only other things that I can think of is to clear arp on both switches and verify the hosts

have the correct ip settings, especially the mask.

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