Hi all, I have a couple of switches that show the same amount of output drops on four consequtive ports.
On an ME3400 I am seeing the same amount of output drops (45,949 discards so far today) on ports gig0/9 through gig0/12. On a Cat2970 I am seeing the same amount of output drops (167,699 discards so far today) on ports gig0/1 through gig0/4. These two switches have a trunk port between them on gig0/11 on the ME3400 and gig0/3 on the Cat2970. I find this odd enough in itself but what makes it even odder is that the (in total 8) ports are configured very differently. Some are VLAN trunks, some are access ports, and one port is even a dot1q-tunnel. The drops do not seem to be related to traffic levels; some of the ports are at less than 1 kbps utilised. As far as I understand the architecture of both platforms, ports are grouped together in 4 on each ASIC. What could possibly explain why four ports on the same ASIC show the same amount of output drops? I can add that I saw the same behaviour on a Cat3560 last week (again four ports on the same ASIC showing same amount of drops) but after removing UDLD from one of the ports (copper), the drops stopped. On the ME3400 and the Cat2970, UDLD is not running on the ports in question. Thanks in advance, -- Regards Christian Bering IP engineer, nianet a/s Phone: (+45) 7020 8730 _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/