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Re: VRRP

 
Brad_199
Frequent Advisor

VRRP

Testing 2 x 5406's in a lab with a few VLAN's.  VRID's configured for each VLAN.

 

VLAN 1 Virtual IP = 192.168.1.254

Primary core switch VLAN 1 IP = 192.168.1.254

Backup core switch VLAN 1 IP = 192.168.1.253

 

DHCP server's scope for VLAN 1 assigns client devices gateway to 192.168.1.254

 

I've noticed that if a laptop or client workstation is plugged into the backup core switch; it can still reach off site networks despite it's gateway IP being the primary core switch (192.168.1.254)

 

I wasn't expecting that behaviour as the backup core switch is effectively sitting idle (I thought?)

 

VRRP config commands on each switch verified that the owner for VLAN 1 is the primary switch.

 

Is this normal behaviour?

2 REPLIES 2
Vince-Whirlwind
Honored Contributor

Re: VRRP

That's exactly why you want VRRP.

 

The master "owns" the .254 address and does all the routing. The backup is functioning as a layer2 switch.

 

It wouldn't be any good if devices patched into the "backup" couldn't reach their default GW, would it?

 

 

Brad_199
Frequent Advisor

Re: VRRP

Thanks Vince.

I overlooked the fact its L3 redundancy and was thinking of it like an active/standby setup