BGP soft reconfiguration and route refresh

[Roel Reyes]

Hi all,

i have questions: 

1. Who will take precedence if route refresh is supported by my router and neighbor but i still configured it with soft-reconfiguration inbound? is there any article from cisco?

2. if soft-reconfiguration inbound takes precedence then how would i refresh my peer if new outbound policy is applied? like AS path prepend, i only see clear ip bgp 192.168.1.1 soft in how about my outbound? 

Thanks all

[Flavio Miranda · Accepted solution]

Hello,

I think you are misundestanding the concept of route refresh and soft-reconfiguration inbound.

Route refreash is part of the OPEN message sent:

-BGP Version (usually version 4)

-BGP AS Number

-Hold Time

-BGP Identifier (BGP router-id)

-Optional Parameters (includes the router’s BGP capabilities, such as; authentication, multi protocol support, & route-refresh)Which means, with all others parameters, router ask an route-refresh.

Soft-reconfiguration inbound is used when route-refresh is not supported. So, is it not possible to have conflit considering you are not going to use both at the same time.You may want to read this:

https://supportforums.cisco.com/t5/service-providers-documents/route-refresh-soft-reconfiguration-inbound-on-ios-xr/ta-p/3129075

This document start with the following statement:

This document explains behaviour of Cisco routers running IOS-XR when configuring soft-reconfiguration Inbound

 Possible scenarios:

1. - When the BGP neighbour is not route refresh capable: