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output buffers swapped out

We have a Frame-relay link to remote location and users are complaining about slow performance.

While looking into serial interface detail I found that the "output buffers swapped out" counter is keep increasing.

Any one can help me to understand the cuase of issue.

Regards,

Muhammad

27845

1 REPLY
Bronze

Re: output buffers swapped out

Output buffers swapped out is a feature of the RSP-based Cisco 7xxx systems. If the outbound interface transmit queue is full, then the

packet is copied from a hardware buffer to DRAM, then copied back to the transmit queue when there is room. If you are using fancy

queuing (such as fair, custom, priority) then you cannot disable this feature; however, when not using fancy queueing you can disable the

buffer swapouts with the following interface command:

no transmit-buffers backing-store.

This prevents packets from being dropped in the output path, however it can add latency to the packet transit time. If your applications are very time-sensitive, then it may be preferable to disable this feature.

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