Large prefix lists/sets on IOS-XR

Saku Ytti saku at
Fri Dec 9 15:33:09 UTC 2022

On Fri, 9 Dec 2022 at 17:30, Tom Beecher <beecher at> wrote:

> 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.

If you read carefully, that is what Steffann is doing. He is doing
'load location:file' + 'commit'. He is not punching anything by hand.

So the answer we are looking for is how to make that go faster.

In Junos answer would be 'ephemeral config', but in IOS-XR as far as I
know, the only thing you can do is improve the 'load' part by moving
the server closer, other than that, you get what you get.

More information about the NANOG mailing list