On Wed, Jun 02, 2004 at 09:22:23PM +0200, Vincent De Keyzer wrote:
> Hello,
>
> I am seeing output errors on an ATM interface. What can be the cause of
> those?...
>
> Vincent
Vincent,
This is interesting. We have exactly the same issue here on one of our
ATM interfaces (in this case a E3 (PA-A3-E3)):
ATM4/0/0 is up, line protocol is up
Hardware is cyBus ENHANCED ATM PA
MTU 4470 bytes, sub MTU 4470, BW 33920 Kbit, DLY 200 usec, rely 255/255, load 4/255
Encapsulation ATM, loopback not set
Encapsulation(s): AAL5, PVC mode
4095 maximum active VCs, 129 current VCCs
VC idle disconnect time: 300 seconds
0 carrier transitions
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:31:47
Input queue: 0/75/0/14 (size/max/drops/flushes); Total output drops: 160
Queueing strategy: fifo
5 minute input rate 673000 bits/sec, 249 packets/sec
5 minute output rate 574000 bits/sec, 259 packets/sec
2293083 packets input, 822428045 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
2396582 packets output, 738456996 bytes, 0 underruns
66 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
output errors go up slightly for a while, but then suddenly, they
start going up faster and we see that packets from one PVC to another over
the same physical interface are not switched correctly (heavy packet loss).
What IOS are you running?
As for Niels' suggestion: sh contr atm4/0/0 doesn't show up anything useful
here.
Stefan
--
Stefan Baltus <stefan.baltus at xbn.nl> XB Networks B.V.
Manager Engineering Televisieweg 2
telefoon: +31 36 5462400 1322 AC Almere
fax: +31 36 5462424 The Netherlands