Catalyst 6513 - high number of PAUSE output

Unanswered Question
Sep 28th, 2008


From the show interface of a catalyst 6513, there is a high number of “PAUSE output”

what does it mean?

What is the effect of it?

What should I do for this?

Will it cause occation ping drop?

This is my capture.

5 minute input rate 78000 bits/sec, 32 packets/sec

5 minute output rate 2767000 bits/sec, 550 packets/sec

4282909181 packets input, 1176591311652 bytes, 0 no buffer

Received 80874266 broadcasts (75348550 multicasts)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 2 frame, 0 overrun, 0 ignored

0 watchdog, 0 multicast, 6 pause input

0 input packets with dribble condition detected

20121989983 packets output, 10910801409021 bytes, 0 underruns

0 output errors, 0 collisions, 3 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 27560 PAUSE output

I have this problem too.
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satish_zanjurne Sun, 09/28/2008 - 21:30


1.The Pause control counter indicates the number of times the router requests another router to slow the traffic.

2.For example, two routers, Router A and Router B, are connected through a link with flow control enabled. If Router B faces a traffic burst, Router B sends a Pause output packet to inform Router A to slow the traffic because the link is oversubscribed. At that time, Router A receives a Pause input packet that informs it of the request sent by Router B

3.Pause output / input packets are not a problem or an error.

4.They are simply flow control packets between two devices.

5.In your case, output PAUSE, this device is sending PAUSE requests to peer device.

6.It will not cause ping drop.

HTH...rate if helpful.

ezsurf0902 Sun, 09/28/2008 - 22:18


I would like to do more reading regarding the error on interface, is there any link that I can refer to?


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