Dot11radio0 output Errors

Unanswered Question
Sep 3rd, 2009

Hi All,

I've noticed most of our ap dot11radio0 interface has some output errors. I saw on cisco site that this could be caused by wireless interference within the 2.4ghz band. What could be the other causes for this "output errors" and what is the acceptable percentage in relation to total packet output? Please see output below. Thanks

Dot11Radio0 is up, line protocol is up

Hardware is 802.11G Radio, address is 0017.df7c.70c0 (bia 0017.df7c.70c0)

MTU 1500 bytes, BW 54000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set

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

Last input 00:00:57, output 00:00:10, output hang never

Last clearing of "show interface" counters 7w1d

Input queue: 0/1127/0/0 (size/max/drops/flushes); Total output drops: 21206002

Queueing strategy: fifo

Output queue: 0/30 (size/max)

5 minute input rate 1000 bits/sec, 4 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

14544072 packets input, 868134789 bytes, 0 no buffer

Received 10787 broadcasts, 0 runts, 0 giants, 0 throttles

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

0 input packets with dribble condition detected

4609827 packets output, 2021475414 bytes, 0 underruns

429260 output errors, 0 collisions, 0 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

dawlims

I have this problem too.
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Leo Laohoo Sun, 09/06/2009 - 17:04

Have you tried to do a survey to confirm if your radio is clashing in the same channel?

dawlims0920 Sun, 09/06/2009 - 20:09

Hi good day. Thanks for your response. I've verified the channels already. We have assigned the correct channels accordingly with regards to non-overlapping channels 1,6 and 11. There are other ap's nearby. There are around 6 ap's on that area, 2ap's using ch1, 2ap's using ch6 and 2ap's using ch11. Is there an acceptable percentage for wireless interface output errors to packets output ratio? Thanks

dawlims

dawlims0920 Sun, 09/06/2009 - 21:33

To add, for this ap. Normally there's not client using this ap, since this is under conference room. I even setting up another new ap on that location and I temporarily powered off the old one. Still I see the same errors incrementing once in a while. Other access points on this floor still has errors but they are no more than 1% of the total output packets. With this specific ap/location, I usually see around 8-10% errors. Thanks

dawlims

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