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Community Member

Collisions and Output errors with a Polycom Camera


I am experiencing some interface and connectivity problems with a Polycom Camera connected to a 4507R Switch.

Specifically, output errors and collisions.

Here´s the output:

GigabitEthernet2/38 is up, line protocol is up (connected)

Hardware is Gigabit Ethernet Port, address is 0013.7fec.aca5 (bia


Description: Camara Polycom Sala Videoconferencia

MTU 1500 bytes, BW 10000 Kbit, DLY 10 usec,

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Half-duplex, 10Mb/s, link type is auto, media type is 10/100/1000-TX

input flow-control is off, output flow-control is off

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

Last input never, output never, output hang never

Last clearing of "show interface" counters 38w1d

Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

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

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

23360328 packets input, 13363490745 bytes, 0 no buffer

Received 4074 broadcasts (0 multicast)

0 runts, 0 giants, 0 throttles

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

0 input packets with dribble condition detected

29303208 packets output, 13592022686 bytes, 0 underruns

177638 output errors, 88819 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

Speed and Duplex are fixed to 10 Mbps - Half duplex.

Probably the transmitted/reveived packets in comparisson to output errors is not too high but I´m experiencing some freeze and slow video problems.

Any idea of what could be happening?

Any comments would be appreciated.



Re: Collisions and Output errors with a Polycom Camera

If you hardwire the speed/duplex settings on the endpoint, then you should hardwire the switch end too. Try hardwiring both ends to 100/full.

Community Member

Re: Collisions and Output errors with a Polycom Camera

Thanks for your reply...

The thing is that this camera only connects at this speed and duplex.

Does anyone know why Output Errors are the exact double of collisions???

When a collision occur the packet is retransmitted but shouldn´t be an output error.

Could this be the camera NIC that's not working properly?

Thanks Carlos.

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