How to read Wireless Interface error

I have a few questions about this error on the interface.

(1) what could be the problem and the solution for the mistakes of this interface? I noticed that the number of output errors multiply.

(2) why the number of errors is different from the interface of two?

(3) how to know either the AP or external antennas is defective? This access point is a 1200 series.

AP #sh int dot11Radio 0

Dot11Radio0 is up, line protocol is up

Material is 802.11 G Radio, the address is 1111.1111.1111 (bia 1212.1212.1212)

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

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

Encapsulation 802. 1 q Virtual LAN, Vlan ID 1., loopback not set

Type of the ARP: ARPA, ARP Timeout 04:00

Last entry of 00:00:00, 00:00:00 exit, exit hang never

Last clearing of "show interface" counters 17:19:47

Input queue: 0/75/0/0 (size/max/drops/dumps); Total output drops: 7338

Strategy of queues: fifo

Output queue: 0/30 (size/max)

5 minute input rate 5000 bps, 6 packets/sec

5 minute output rate 243000 bits/s, 145 packets/s

1034266 package, 1153540007 bytes, 6 no input buffer

Received 6155 broadcasts, 0 Runts, 0 Giants 0 shifters

entry 0, 0 CRC errors, frame 0, saturation 0, 0 ignored

entry packets 0 with condition of dribble detected

1171797 packets output, 443779394 bytes, 0 underruns

449 output errors, 0 collisions, 0 resets interface

0 babbles, collision end 0, 0 deferred

0 lost carrier, 0 no carrier

output buffer, the output buffers 0 permuted 0 failures

AP #sh int dot11Radio 1

Dot11Radio1 is up, line protocol is up

The material is 802. 11A Radio, the address is 2222.2222.2222 (bia 2323.2323.2323)

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

reliability 255/255, txload 2/255, rxload 1/255

Encapsulation 802. 1 q Virtual LAN, Vlan ID 1., loopback not set

Type of the ARP: ARPA, ARP Timeout 04:00

Last entry of 00:00:00, 00:00:00 exit, exit hang never

Last clearing of "show interface" counters 17:20:11

Input queue: 0, 75, 2, 0 (size/max/drops/dumps); Total output drops: 7775

Strategy of queues: fifo

Output queue: 0/30 (size/max)

5 minute input rate 3000 bps, 5 packets/s

5 minute output rate 528000 bps, 144 packets/s

241379 package, 35065157 bytes, 4 no input buffer

Received 4941 broadcasts, 0 Runts, 0 Giants 0 shifters

entry 0, 0 CRC errors, frame 0, saturation 0, 0 ignored

entry packets 0 with condition of dribble detected

686438 packets output, 149994557 bytes, 0 underruns

291 output errors, 0 collisions, 0 resets interface

0 babbles, collision end 0, 0 deferred

0 lost carrier, 0 no carrier

output buffer, the output buffers 0 permuted 0 failures

Rare exceptions, errors always will... increase the key factor is "how (what sort of) errors," and "how long are they produced."

It is a common process in troubleshooting to reset the counters (XXX clear interface counters) and analyze them for a period to determine the error rate (how fast the mistakes happen).

You can also use this time to investigate whether counters increase because of some external actions (a Manager or some other iXdXiXoXtX standing in front of the antenna, for example).

(2) you can activate one both antennas and measures on the ground with a laptop running Netstumbler (www.netstumbler.com , it's free) and compare the results of one antenna compared to another.

Good luck

Scott

Tags: Cisco Wireless

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