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Flushes on a POS interface


I am getting a lot of flushes on a POS interface. Can someone tell me why i am seeing these flushes and how can I fix the problem.


show int pos 1/1/0

POS1/1/0 is up, line protocol is up

Hardware is Packet over Sonet

Internet address is

MTU 4470 bytes, BW 155000 Kbit, DLY 200 usec,

reliability 255/255, txload 9/255, rxload 85/255

Encapsulation HDLC, crc 16, loopback not set

Keepalive set (10 sec)

Scramble disabled

Last input 00:00:00, output 00:00:01, output hang never

Last clearing of "show interface" counters 1d15h

Input queue: 33/75/2/753013 (size/max/drops/flushes); Total output drops: 25

Queueing strategy: VIP-based fair queuing

Output queue: 0/40 (size/max)

30 second input rate 51818000 bits/sec, 11471 packets/sec

30 second output rate 5889000 bits/sec, 2702 packets/sec

599539441 packets input, 298870698550 bytes, 0 no buffer

Received 16477 broadcasts, 47 runts, 0 giants, 0 throttles

0 parity

1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 1 abort

202510627 packets output, 52630640776 bytes, 0 underruns

0 output errors, 0 applique, 2 interface resets

0 output buffer failures, 0 output buffers swapped out

2 carrier transitions


Re: Flushes on a POS interface

I think Flushes or overrun error occurs on a POS(Packet over SONET) because the input rate may be exceeding the receiver's ability to handle the data.This means that the other side of the connection sends the data faster than the receiving controller could process it. One solution would be to rate-limit the TX traffic on the remote end or change the connection to a higher speed interface.If it is a backup link for any GigE card, then try moving that card to someother Bus