I currently have two adjoining switches that are having excessive input and CRC errors. One switch is a Cat 2970 and the other is a Cat 3548. I've included the config output and port stats for each switch interface. Does anyone know what could cause these conditions?
FastEthernet0/6 is up, line protocol is up
Hardware is Fast Ethernet, address is 0002.b963.9ac6 (bia 0002.b963.9ac6)
Description: Uplink to 10.50.1.4
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 54/255, rxload 20/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:54, output hang never
these issues can be caused by faulty type patch/link cables or other physical layer issues.
the fact that you have GB >>> 100mb port makes me wonder if you get the same issues with 100mb >>> 100mb. if so, replace the patch cables or check the 'inside' wiring between the switches for faults or anomolies.
are you CAT5e on both sides, all the way through or do you have other CAT type cables in the mix? try a single specification end-to-end if you can.
The first thing you need to do is clear the counters , according to your display they have never been cleared so you really don't know how long a period of time this is over , probably since the last time the switch was rebooted whenever that was , clear both sides then watch it . The errors could have been caused when you hooked the link if had a temporary speed/duplex mismatch or something . Clear counter s and watch for a week .
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