HSRP and span issue

[Lovedeep Marwah]

                  Hi Guys- I have just come across some wired issue. I have two layer three switches say A and B and switch B connects to another switch say switch C. Switch A and B are running HSRP for vlan 1,101 and 103. Switch C is the voice switch and i am using a monitor session to span all the voice traffic to server connected to the same switch. when configure switch with command monitor session 1 source vlan 103 and mintor session destination int gi0/3 my entire network goes offline but when i use monitor session 1 source interface gi 0/6 - 46 it works all good. Below is the brief description of HSRP.

Switch A-        interface vlan 1

                      ip add 192.168.0.251 255.255.255.0

                      standby ip 192.168.0.254

                      interface Vlan 101

                      ip add 192.168.1.251 255.255.255.0

                      standby ip 192.168.1.254

                      interface vlan 103

                        ip add 192.168.3.251 255.255.255.0

                      standby ip 192.168.3.254

Switch B-            interface vlan 1

                          ip add 192.168.0.252 255.255.255.0

                          standby ip 192.168.0.254

                          interface Vlan 101

                          ip add 192.168.1.252255.255.255.0

                          standby ip 192.168.1.254

                          interface vlan 103

                          ip add 192.168.3.252 255.255.255.0

                          standby ip 192.168.3.254

switch C-            interface vlan 103

                          ip add 192.168.3.253 255.255.255.0

                          ip default-dateway 192.168.3.254

So bascically when we configure the command monitor session 1 source vlan 103 on switch C  network goes offline and we can see the following error in logs of swich A and B.

"HSRP-4-DIFFVIP1: Vlan 1 grp 0 active routers virtual ip address 192.168.3.254 is different to the locally configured address 192.168.0.254."

Switch B is in active mode for vlan 1,101 and 103 and switch A is in standby mode. Also if we change the command to monitor session 1 source interface gi 0/6 -46 network comes back online.

Please help me guys this issue is driving me nuts!!!!!

Thanks,

Lovedeep.

[cflory]

From the error message you've posted, it seems you are not assigning a standby 'group' for each SVI, and each HSRP IP is falling within the default group '0'.  Is that correct, or did you just not post the rest of the HSRP configuration per interface?

-Chris

[Lovedeep Marwah]

Hi Chris,

Thank you for your reply. Yes i haven't assigned the group so bydefault they are falling in group 0.

[cflory]

I don't suppose trying to resolve the error message by assigning a different group per SVI works?

What is significant about the configuration difference between G0/3 on Switch C and say G0/6-46?

[Lovedeep Marwah]

Basically on 0/3  have got recording server connected and 0/6 - 46 are used for connecting phones. As per my knowledge group number doesn't matter.

[cflory]

Granted, it shouldn't matter, but your logs are barking about it.  In a normal HSRP state, those messages are not seen.  So, either there's a configuration issue somewhere, or perhaps some other condition that has not been revealed to this forum....or a bug.  Without configs in front of me, and if changing groups doesn't help, then I'm left to improve my dart game.

[mahmoodmkl]

Hi
Is there a direct connection between A n B



Sent from Cisco Technical Support Android App

[Lovedeep Marwah]

Hi,

Sorry i forgot to mention that in my first post. Yes they are directly connected.