10-09-2007 09:42 AM - edited 03-03-2019 07:05 PM
I have some routers that I just upgraded to 12.3.23 and now I am getting input errors when I do a "sh int". Plus I see them on my Network Monitor. Does anyone know of this issue?
Thanks.
Solved! Go to Solution.
10-09-2007 03:16 PM
The 12.4 I am using is the mainline version, although not GD yet. What's interesting is it was fine and got broken with a new patch release. Saw this happen before early in the 12.2 mainline, someone working and then a maintenance release broke it. (Fortunately, seems to happen rarely.)
10-09-2007 10:05 AM
Here is a dump from what I see.
Multilink2, bundle name is Farm-Router
Bundle up for 1d01h, total bandwidth 3072, load 14/255
Receive buffer limit 24384 bytes, frag timeout 1000 ms
0/0 fragments/bytes in reassembly list
0 lost fragments, 840100 reordered
0/0 discarded fragments/bytes, 0 lost received
0x54A790 received sequence, 0x5EB6A6 sent sequence
Member links: 2 active, 0 inactive (max not set, min not set)
Se0/0:0, since 1d01h, 1920 weight, 1496 frag size
Se0/3:0, since 19:38:52, 1920 weight, 1496 frag size
Multilink2 is up, line protocol is up
Hardware is multilink group interface
Internet address is X.X.X.X/2XX
MTU 1500 bytes, BW 3072 Kbit, DLY 100000 usec,
reliability 137/255, txload 18/255, rxload 8/255
Encapsulation PPP, LCP Open, multilink Open
Open: IPCP, CDPCP, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 2 seconds on reset
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 1d01h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 13033
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 107000 bits/sec, 67 packets/sec
5 minute output rate 227000 bits/sec, 71 packets/sec
5384323 packets input, 1709732669 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
5384323 input errors, 0 CRC, 5384323 frame, 0 overrun, 0 ignored, 0 abort
5647964 packets output, 2865553925 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
10-09-2007 11:57 AM
Don't know if they're related, but similar issue found within 12.4(16) but not 12.4(13d). Believe it's a known bug, at least with 12.4.
10-09-2007 12:07 PM
Thanks, I will do some digging to see it this is the case. I stuck with GD to hopefully miss these issues. Guess not.
10-09-2007 03:16 PM
The 12.4 I am using is the mainline version, although not GD yet. What's interesting is it was fine and got broken with a new patch release. Saw this happen before early in the 12.2 mainline, someone working and then a maintenance release broke it. (Fortunately, seems to happen rarely.)
10-10-2007 06:55 AM
TAC said it is a bug. I will apply the lastest version and see what happens.
11-05-2007 07:50 AM
Do you have the bug id. I am seeing the same behaviour.
393257 input errors, 0 CRC, 393257 frame, 0 overrun, 0 ignored, 0 abort
02-01-2008 08:32 PM
I would also be interested in knowing what the bug ID is. I am also seeing the same issue on a 2821 running 12.4(16). I searched on the Bug Toolkit but could not find it.
02-01-2008 09:09 PM
This looks like the following bug -
CSCsj26883
"SH INT" on MLPPP Bundle interface shows 100% input errors
It's a cosmetic bug that does not affect the actual router operation. Here is some more background -
Symptom: on a multilink bundle interface, the output from "show interface" will show an input error count which includes essentially 100% of the traffic being received. Other drop counters, usually the "bad frame" counter, are also incremented to match. For example:
# show interface Multilink1
Multilink1 is up, line protocol is up
Hardware is multilink group interface
Internet address is 10.20.0.1/30
MTU 1500 bytes, BW 3072 Kbit, DLY 100000 usec,
reliability 181/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open, multilink Open
...
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
6080 packets input, 1027997 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
6077 input errors, 0 CRC, 6077 frame, 0 overrun, 0 ignored, 0 abort
^^^^ ^^^^
Impact: Very Low. This is an accounting error; the counters are being accidentally incremented each time Multilink begins to receive a new datagram. This does not affect actual traffic flow or operation of the bundle, it is only the statistics that are in error.
Workaround: none.
============
IOS's that have the fix: 12.3(24) 12.4(17) 12.4(15)T2 12.4(17)T 12.4(16a)
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