I have a pair of two link FECs w/ISL configured from two different 6509s (Sup2/CAT6.1.1b) to the same 7513(12.0(19)). While both seem to be functioning, I am seeing a few disturbing issues.
1) Using an extended ping, I am dropping 6-9% of my packets on these FECs. At the same time, I am running single ISL links from the same two 6509s to a different 7507 (on the same subnet) and not seeing any packet loss.
2) A look at STP on the 6509s show that I am forwarding on both links for all trunked VLANs, but the MAC counters show discards, In-discards on one link, out-discards on the other. The 7513 shows no drops.
3) The port-channel interfaces on the 7513 are setup as full-duplex but a "sh int port-chan" indicates that the port speed is unknown.
I currently have a problem open with TAC, anyone have any ideas? Thanks!!
Thanks for the input, both ends of the FEC are set to 100/full and STP on the 6509 says that he is forwarding on both links (I can verify this by looking at the MAC counters on the 6509, both ports are going up). I'm pretty sure FEC is the problem, before I implemented FEC I had each leg of the port-channel defined as an individual ISL link between the two boxes and they were working fine. As soon as I introduced FEC my performance went into the bucket. Thanks again...
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...