Large prefix lists/sets on IOS-XR

Tom Beecher beecher at
Fri Dec 9 15:27:17 UTC 2022

Pushing thousands of lines via CLI/expect automation is def not a great
idea, no. Putting everything into a file, copying that to the device, and
loading from there is generally best regardless. The slowness you refer to
is almost certainly just because of how XR handles config application. If
I'm following correctly, that seems to be the crux of your question.

On Thu, Dec 8, 2022 at 6:04 PM Sander Steffann <sander at> wrote:

> Hi,
> What is the best/most efficient/most convenient way to push large prefix
> lists or sets to an XR router for BGP prefix filtering? Pushing thousands
> of lines through the CLI seems foolish, I tried using the load command but
> it seems horribly slow. What am I missing? :)
> Cheers!
> Sander
> ---
> for every complex problem, there’s a solution that is simple, neat, and
> wrong
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