I've got a Cisco 2611 router running an IP-only GD release of 12.2(40). 48MB RAM. I've got a 384K frame-relay port attached to a WIC card; the PVC is 192K. Pertinant parts of 'show interface' are below. Do you think I have a queue problem, or a wiring problem?
The interface never goes down on layer3 or layer2; it's always up, but these errors come in abound one every 5-6 seconds or so. Traffic might hit 100% of the PVC speed once every 12 hours, but it does *not* do it constantly.
What are you more concerned with here, the output drops or the input errors. The output drops are an indication of oversubscription, even if only for a millisecond. Since the default output queue is 40 packets, all it takes is a single burst of 41+ packets to fill this queue and have a drop, which wont show up on any monitoring tool. If you paste in your FR main/subinterface configuration I can let you know how to make your output queue bigger.
As for the input errors, this usually indicates a line problem. You can try doing loopback tests at different points in your network to narrow it down, or you can just ignore them if they dont have much of an impact. What kind of serial interface module are you using?
Original poster here -- Another interesting test I did proved that even when I'm experiencing CRC errors, I don't drop any packets. I tried pinging with 36-byte packets, and 1400-byte packets, and everything arrives OK with no drops. Does this further implicate a queueing problem?
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