[Xorp-hackers] Xorp newbie: dynamic BGP policies

[Andreas Voellmy]

Hi all,

I'm just getting started with Xorp and have a question about BGP policy (or
maybe xorp routing policy in general):

I've noticed in a couple papers (such as "Decoupling Policy from Protocols")
dynamic BGP configurations for Xorp, such as something like
"metric=metric*2" or "MED += 1". However I haven't seen this in the official
manual - there I've only come across static values in configurations. Are
these sorts of dynamic settings (such as incrementing, multiplying, etc.)
valid policies for the BGP implementation that Xorp provides? Or is this
something I'd need to extend the basic BGP code to do? If so, could someone
point me in the right direction in the code; i.e. how does one add a new
stack operation to a protocol?

Thanks!

Andreas
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