11-04-2016 02:17 AM
Brocade 6520, FOS 7.3.1c
I've been tasked with migrating ISLs to a new DWDM service. I have a 2 x port trunked ISL between a 6520 switch at site A and a 6520 switch at site B (merged fabrics). The new DWDM links are above the 30 metre tolerance for links within the same trunk so I can't add the new links to the existing trunks and decommission the old ones. Could I instead:
1. Within a separate port gourp, create a new ISL trunk on the new service
2. Increase the link cost of the old ISL trunk to push the traffic across the new links
3. Decommission the old links
Solved! Go to Solution.
11-04-2016 06:47 AM
11-04-2016 07:43 AM
Thanks very much for the reply Alexey, much appreciated.
I was concerned about how the switches would deal with the routing with two separate ISL trunks between the same switches but I guess FOS just handles it.
Is it possible to estimate when the frames will utilise the new trunked ISL once the cost has been increased on the old trunked ISL? Is it immediate, seconds, minutes, or perhaps longer?
11-04-2016 07:53 AM