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cisco2924XL troubleshooting

Two cisco2924XL, say sw1 and sw2. port2 of sw1 connects to port1 of sw2. port2 of sw1 experiences down/up every couple of days. Checking the statistics shows that port2 of sw1 has 15312 FCS errors, while port1 of sw2 has 103584 Late collisions. It looks like an autonegotiation mismatch. However, checking the port settings shows that both ports are auto-sensed at full duplex and 100Mbps.

Could anyone explain what's wrong?

Tian

1 REPLY
New Member

Re: cisco2924XL troubleshooting

Tian,

The best way to go is to fix these ports on both ends to 100mb full duplex no portfast.

Auto negotiation should not be used on this type of connection for the reason you just found.

Regards, Maarten Sjouw.

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