Hello,
We recently installed a 9606r for a campus core and we have had some troubling issue with devices falling off/dropping traffic.
We have a few line cards 9600-lc-48YL for Copper SFP's. These line cards are heavily populated (all 48 slots used) and we have had 3 devices exhibit this issue. (one a pc, one a cisco firewall and one a sophos xg firewall). The SFP are GLC-TE version 3.
What will happen is the device plugged into those will stop responding correctly, a "show int status" will show the port is still up and connected and looks happy but the errors continue. The one thing I notice is when doing a "show int status x/x/x link" command, the UP time on the link is always being reset while devices not having the problem are showing their link uptime congruent with the entire switch uptime (or physical up/down of that device uptime).
Troubleshooting steps we have taken:
We have tried new Cisco SFP, offbrand SFP, device reboots, speed/duplex locking/auto and even new cabling but nothing has resolved it, the issue will reoccur within minutes/hours.
Fortunately we have another 9606r which we ended up moving these devices too and they have stayed solid on that one so we are focusing on firmware differences on the line cards between the 2 systems but we are waiting for Cisco guidance as we have a TAC case going but wanted to see if the collective brain trust of Cisco community had any insights.
Thanks!
