On 15/12/10 16:00, Kevin Warwashana wrote:
I have a question regarding redundancy protocols on the 7600. Here is my
scenario:
1 - 7609-S
2 - Sup720-3BXL
2 - 3560's switches
What I would like to do is configure a GLBP group and have both SUP's be a
member.
There may be a misconception underlying this desire.
"Both" SUPs are not active/available for use. The 2nd SUP is in either
cold or hot standby mode, depending on your redundancy config.
Conceptually, the device has a single active forwarding engine - and you
can't have overlapping IPs, so basically this won't work.
One SUP to one 3560 and the other to the second 3560. The 3560 are
tied together via a x-over. So if a SUP fails the other will be able to
route for the networks connected to it.
Again, this isn't really how the dual-sup 6500/7600 stuff works.
Just use a VLAN interface; if the SUP fails over, the 2nd SUP will take
it on:
inteface VlanX
ip address 1.1.1.1 255.255.255.0
int Gi1/1
description 3560-1
switchport
switchport mode access
switchport access vlan X
int Gi1/2
description 3560-2
switchport
switchport mode access
switchport access vlan X
You will need spanning tree to close the layer2 loop.
There are other ways to do this - the "backup interface" stuff just
today discussed on the list for example.
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