Hsrp configuraiton

[faizkarimullah baig]

HI

     we started a new branch ,there two link is there one 100mbps and 30 mbps from diffrent vendors. one link is connected to first multilayerswitch

and anoter is connected to second multilayer switch..

in this two switch i want to configure two default route pointing  to our core mulitlayer switchr in datacenter

we want to configure hsrp and ipsla(if wan 100 mbps down, secondary will be up) for that i configure in gns3 ,hsrp work but wan tracking is not working

configuration of swithes

primarymulitalyerswitch(config)#interface vlan 1

                                               ip add 10.10.16.10 255.255.252.0

                                               no sh

                                               standby 2 ip add 10.10.16.1

                                               standby 2 preempt

                                               standby 2 priority 200

                                               exit

                                                ip route 0.0.0.0 0.0.0.0 1.1.1.2(wan)

                                                ip sla monitor 1

                                                type echo protoclol ipicmpecho 50.0.0.1(loopback)

                                                timeout  2000

                                                thersold 2000

                                                frequency 10

                                                ip sla monitor shedule  1 startime now life foerver

                                                track 1 rtr 1 reachibility

                                                 interface valn 1

                                                standyby 2 track 1 decre 150

        secondarymultilayerswitch(config)#interface valn 1

                                                   ip add 10.10.16.20 255.255.252.0 

                                                   no sh

                                                   standby2 ip add 10.10.16.1

                                                   standby2 priority 100

                                                   exit

                                                   ip route 0.0.0.0 0.0.0.0 2.2.2.2(wan)

datacentermultilayerswitch(config)ip route10.10.16.0 255.255.252.0 1.1.1.1(primarymultialyerswitchinterfaceip)

                                                 ip route 10.10.16.0 255.255.252.0 2.2.2.1(secondaymultlayeswitchinterfaceip)

                                                  interface loopbak 0

                                                   ip add 50.0.0.1 255.255.2552.255

if i shoutdown vlan 1 of primary switch anoterworkig fine but if i down wan interface or shutodown loopback its not workign

                                                                                                                                                 thanku

,

[krugar100]

Have you tried testing this on actual hardware? GNS3 is great for most things but I find that when using HSRP it can be quite unpredicatible when it comes to noticing that a link is meant to be down.

[stephen.stack]

Hi

If you have dynamic routing setup between the two multi-layer switches, then i think the Loopback of the DC Switch never goes down, becuase it will be reachable via the secondary switch. This means object tracking will never fail. You can verify this but shutting down the loopback and check the routing table on the primary switch to see if the loopback route is still in there and pointing towards seconda Multi-Layer Switch.

So, one way to fix it, would be to add a static to route to the primary switch for the loop back via the 100Mbps circuit. If that circuit goes down, the route stays in the routing table and you will not be able to ping the loopback any more

ip route 50.0.0.1 255.255.255.255 1.1.1.2 name PERM_LOOPBACK_DC_SW permanent

Regards

Stephen

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[stephen.stack]

If the above does not resolve it port the following for both switches

- before you shut the Loopback

show ip route

show standby bri

sh ip sla monitor statistics 

- after you shut the Loopback

show ip route

show standby bri

sh ip sla monitor statistics 

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A free, open source network device configuration management tool, customizable to your needs!

[Roger De Couto]

Hello, this is the answer to your problem.

Your secondary switch will take over the primary role after tracking reduces the priority (in your config reduces it by 150), ONLY if you meet the following condition:

*Your secondary switch has preempt configured* This is important otherwise tracking on the primary switch is ineffective.

Good luck.

Roger

[stephen.stack]

Well, that was a good catch, Roger is absolutley corrcet.

Regards

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A free, open source network device configuration management tool, customizable to your needs!

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