[c-nsp] Redundancy Protocol on same 7600

Kevin Warwashana kevinw at telnetww.com
Wed Dec 15 11:00:44 EST 2010


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.  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.

I would do Etherchannel, but the 3560's don't support stackwise.  I tried
setting GLBP up, but the router complained when I tried to add "glbp 1 ip
<address>" on the second interface.

I'm open to suggestions if GLBP won't work.  Here is my configuration:

Active SUP
interface GigabitEthernet5/1
 description Spare SFP Slot 5 Port 1
 ip address 1.1.1.2 255.255.255.0
 no ip redirects
 no ip proxy-arp
 ip flow ingress
 shutdown
 mls qos trust dscp
 glbp 1 ip 1.1.1.1
 glbp 1 timers msec 250 msec 750
 glbp 1 timers redirect 1800 28800
 glbp 1 priority 254
 glbp 1 preempt delay minimum 180
 glbp 1 load-balancing host-dependent
end

Standby SUP
interface GigabitEthernet6/1
 description Spare SFP Slot 6 Port 1
 ip address 1.1.1.3 255.255.255.0
 no ip redirects
 no ip proxy-arp
 ip flow ingress
 shutdown
 mls qos trust dscp
 glbp 1 timers msec 250 msec 750
 glbp 1 timers redirect 1800 28800
 glbp 1 priority 253
 glbp 1 preempt delay minimum 180
 glbp 1 load-balancing host-dependent

(config-if)int gig6/1                      
(config-if)glbp 1 ip 1.1.1.1
% Address 1.1.1.1 in group 1 - interface GigabitEthernet5/1

Thanks,
Kevin




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