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Community Member

bad link

My router si connect to an equipment which encapsulate ethernet frame on E1 link, this equipemnt is connected to router 3620 via ethnet interface. The error on interface eth0/0 is big and ping is not good :

GN-3640-YDE#sh int e0/1

Ethernet0/1 is up, line protocol is up

Hardware is AmdP2, address is 0001.966c.af82 (bia 0001.966c.af82)

Internet address is

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 229/255, txload 11/255, rxload 5/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 02:44:25

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 216000 bits/sec, 77 packets/sec

5 minute output rate 470000 bits/sec, 147 packets/sec

476588 packets input, 170444564 bytes, 0 no buffer

Received 28371 broadcasts, 0 runts, 0 giants, 0 throttles

29707 input errors, 29707 CRC, 14686 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

2300290 packets output, 700548051 bytes, 0 underruns

329 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

329 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

The reliability is not 255/255, the problem is on router card or on the remote equiment ?

Community Member

Re: bad link

Check for duplex/speed mismatches, try changing cables, try a diff. switch port,different ethernet port if available, all of the obvious stuff. What type of device are you tying into?? Can you post a copy of show log?


Re: bad link

Based on the 329 lost carrier errors that you have on your interface, I would say that it is either the cable or router interface that is the issue. Try a different cable first.

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