Large prefix lists/sets on IOS-XR

Joseph Nicholson wjnicholson at
Mon Dec 12 15:18:24 UTC 2022

Adding to Heasley’s comments here. You can transfer via SSH based methods and increase speeds using this command as of IOS XR 7.1.x+

ssh server tcp-window-scale

On 12/9/22, 11:46, "NANOG" < at> wrote:

Fri, Dec 09, 2022 at 05:33:09PM +0200, Saku Ytti:
> 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.

set the tcp default mss higher
use rcpd
remove unnecessary whitespace; ios parser is slow as are the bits behind it
remove comments
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