02-08-2016 07:42 AM
What we are lookig for is a document (ideally a table) that shows at a glance the differences in beheviour and characteristics if someone were to use standard ISLs vs an ISL trunk.
Say for example we had 2 switches and we could either join them via 4 seperate ISLs or we could use trunking to merge those 4 ISLs into one link what would the differences in throughput patterns, failover, physical link utlisations etc be?
We would like to understand if the cost of new trunking licenses are worth it and how the links will behave with and without trunking.
Thanks for any help.
02-09-2016 05:00 AM
Hi, then you use ISL connection without trunking, you must remember about dls option.
And a problem with latency at connect, reconnect or disconnect one of several ISL links.
03-09-2016 04:09 AM
Please refer this useful document.
04-20-2016 12:55 AM
The most important part for me has always been the impact on the fabric when a link goes offline. If you have 4 isolated ISL's a link-drop has an immediate effect on fabric operations as FSPF routes have to be recaculated. If a trunk-member link fails there is only a re-balance of traffic on the ASIC driver level but does not impact fabric behaviour as such.
I would use trunks if I where you.