Support of route server deployment in IOS XR

[Paddle0740]

Hello folks,

I found there are Cisco route server deployment guideline for IOS XE (https://www.cisco.com/c/en/us/td/docs/routers/ios/config/17-x/ip-routing/b-ip-routing/m_irg-route-server.html) but not for IOS XR. If I have a IOS XR device (let say ASR9902), can I deploy it as BGP route server (i.e. eBGP route reflector) ?

Regards,

Wilson

[MHM Cisco World]

As I know ios xr support route server in bgp.

You want how to config?

[Paddle0740]

In IOS XR, I only can find the command "route-reflector-client" which is used to define neighbor as iBGP route reflector client. But for route server deployment in IXP environment, what we need should be something like IOS XE command "route-server-client" to implement behavior like AS_PATH transparency. 

So I would like to know how to implement route server in IOS XR device. Thanks.

[MHM Cisco World]

I check the cisco navigator' ios xe have bgp route server but ios xr not have this feature.

But I found this workaround 

https://www.de-cix.net/en/locations/frankfurt/route-server-guide

[Paddle0740]

Thanks for the searching but the IOS XR config sample in this workaround looks like a route server client config. The command "no bgp enforce-first-as" will aceept the leftmost AS in AS_PATH of received BGP prefixes not being the remote ASN (i.e. route server's ASN).

Anyway I need to know if it is possible to deploy IOS XR device as router server like what we can do to IOS XE device.

[MHM Cisco World · Accepted solution]

ebgp is by defualt advertise route recieve from one peer to all other peer.

What different between route server and ebgp then?

The transparency ' route server dont modify any attribute but ebgp modify it.

Ios xe have feature (commands) that do it directly 

Ios xr not have this feature so you need workaround to make Router (route server) transparency.

That what I meaning.

[Paddle0740]

Yes I need to figure out the alternative way in IOS XR to make attributes like AS_PATH / next-hop / MED transparent to other eBGP peers. Thank you.