Re: Etherchannel on 6509 using WS-6548-GE-TX line cards and IOS. Am running into contradictory answers from CCO doc, and TAC. Appreciate if anyone has come across this.
I understand the 65xx line cards are prone to oversubscription (8:1). The ASIC on these is 6 ports per ASIC, with a 1GB connection into the backplane. So, if we setup adjacent ports in a port channel (or for that matter even use adjacent ports at Gig speed) - the throughput into the backplane is limited to 1G. Am i missing something here ?
If running CATOS 8.2.1 with firmware updates, apparently this is not an issue. TAC mentioned this is a known issue with the 65xx line cards.
Has anyone setup etherchannel on the 65xx modules and had to take the above into account. Tentative plan was for me to use
PO1 - 1/1, 2/1, 3/1, 4/1
PO2 - 1/9, 2/9, 3/9, 4/9
PO3 - 1/17, 2/17, 3/17, 4/17
But, again inbetween ports 1/2, 1/3 will be a PO4 to a smaller 4948 (so i dont see a point in getting too tied up with the oversubscription issue as i can't waste # of ports).
any thoughts, appreciate