BGP AS# migration from IOS to IOS-XR

Ben Bartsch uwcableguy at
Thu Aug 31 11:20:34 UTC 2017

Get in touch with your Cisco SE or partner.  Cisco SE's have access to a
conversion tool that takes in an IOS config and spits out an XR config.
It's usually about 80-95% correct.  It even shows you sections that are not
in use and can be removed.

On Thu, Aug 31, 2017 at 5:39 AM, Nick Hilliard <nick at> wrote:

> marcel.duregards--- via NANOG wrote:
> > Cisco offer a doc how to migrate from IOS to XR of about 40pages, but
> > it's quite old (XR 3.2) and not so interesting.
> that doc is still relevant.
> > And how to you manage RPL editing? I mean with IOS you have some
> > completion on TAB keystroke, but as RPL has to be edited within a text
> > editor, you loose this kind of 'help'.
> You can edit RPL from the command-line too, with tab completion and
> inline help.
> > Maybe we have to re-think our config from scrash
> that is a good option in this situation.  RPL is significantly more
> flexible than what's available on vanilla IOS, and you would benefit
> from learning RPL, then standing back and looking carefully at what
> you're doing with route routing policy to see how it can be abstracted
> into well-structured RPL.
> There are a number of major new features: RPL functions can call other
> RPL functions, which you can't really do with route-maps (leading to
> lots of duplication for similar configuration), and passing variables
> into RPL functions. You can use these features to build up structured
> RPL configuration mechanisms which give a lot of flexibility and power.
> Also, XR is better from the point of view of automation.  If it makes
> sense to build automation into your network, this would provide a good
> opportunity.
> Nick

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