On Tue, 4 Jan 2000, Xavier wrote:
> Hi Cisco Gurus,
>
> I'm busy with the replacement of a C2501 by a C2610 with a 4 Serial in Slot1.
>
> Cisco is connected to a 7206. I just replaced the C2501 with the C2610
> and plugged the same cables etc... (both router have the same IP, routes, ...)
>
> Problem: The line is up but the protocol is going up/down every mins.
> I also get a very high numbers of errors! Any idea?
Main law of electronics: Never touch working system! ;)
Fifteen minutes before I touched router, which worked for an year before it
and found that one channel started "twinkling". After going along cable I have found
broken wire on patch-panel, which was broken when cable was moved...
Your case seems just the same...
Double-check grounding of boxes, CSU/DSUs, unplug, recheck and reinsert all cables.
Make sure that all screws are tighten properly.
>
> On the 7206:
>
> Serial4/0 is up, line protocol is up
> Hardware is M4T
> Interface is unnumbered. Using address of FastEthernet0/0 (a.b.c.d)
> MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec, rely 185/255, load 1/255
> Encapsulation HDLC, loopback not set, keepalive set (10 sec)
> Last input 00:00:04, output 00:00:00, output hang never
> Last clearing of "show interface" counters 00:39:11
> Input queue: 0/75/0 (size/max/drops); Total output drops: 0
> Queueing strategy: weighted fair
> Output queue: 0/64/0 (size/threshold/drops)
> Conversations 0/258 (active/max active)
> Reserved Conversations 0/0 (allocated/max allocated)
> 5 minute input rate 2000 bits/sec, 3 packets/sec
> 5 minute output rate 0 bits/sec, 0 packets/sec
> 3264 packets input, 254842 bytes, 0 no buffer
> Received 0 broadcasts, 0 runts, 4 giants
> 3619 input errors, 954 CRC, 0 frame, 0 overrun, 0 ignored, 2665 abort
> 2344 packets output, 204378 bytes, 0 underruns
> 0 output errors, 0 collisions, 57 interface resets
> 0 output buffers copied, 0 interrupts, 0 failures
> 57 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up
>
> !
> interface Serial4/0
> ip unnumbered FastEthernet0/0
> ip accounting output-packets
> bandwidth 512
> !
>
> On the 2610:
>
> Serial1/0 is up, line protocol is up
> Hardware is CD2430 in sync mode
> Interface is unnumbered. Using address of Ethernet0/0 (e.f.g.h)
> MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec,
> reliability 128/255, txload 1/255, rxload 1/255
> Encapsulation HDLC, loopback not set, keepalive set (10 sec)
> Last input 00:00:05, output 00:00:00, output hang never
> Last clearing of "show interface" counters 00:39:15
> Input queue: 0/75/0 (size/max/drops); Total output drops: 0
> Queueing strategy: weighted fair
> Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> Conversations 0/3/256 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> 5 minute input rate 0 bits/sec, 0 packets/sec
> 5 minute output rate 0 bits/sec, 0 packets/sec
> 146 packets input, 11046 bytes, 0 no buffer
> Received 37 broadcasts, 0 runts, 2 giants, 0 throttles
> 2124 input errors, 761 CRC, 0 frame, 1349 overrun, 0 ignored, 14 abort
> 6233 packets output, 502884 bytes, 2321 underruns
> 2321 output errors, 0 collisions, 80 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 0 carrier transitions
> DCD=up DSR=up DTR=up RTS=up CTS=up
>
> !
> interface Serial1/0
> ip unnumbered Ethernet0/0
> no ip directed-broadcast
> bandwidth 512
> !
>
> --
> Visit: http://3276456082
> "Contrary to popular belief, Unix is userfriendly.
> It just happens to be selective about who it makes friends with."
>
---------------------------------------------------------
Basil (Vasily) Dolmatov CCIE #5347, CCNP-Security, CCDA
East Connection ISP, Moscow, Russia. (http://www.east.ru)
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