[j-nsp] BGP path selection

[Stacy W. Smith]

Beginning in JUNOS 7.2 there is a knob, [edit protocols bgp]  
external-router-id, to control this.

 From  
http://www.juniper.net/techpubs/software/junos/junos72/rn-sw-72/rn-new- 
features.html#rn-new-features

"Routing table path selection—For each prefix in the routing table, the  
routing protocol process selects a single best path, called the active  
route. For paths that include an autonomous system (AS) path, by  
default only the multiple exit discriminators (MEDs) of routes that  
have the same peer ASs are compared. However, you can modify this  
behavior by configuring one of the routing table path selection options  
for the path-selection statement included at the [edit protocols bgp]  
hierarchy level. The original options are cisco-non-deterministic  
(which mimics the behavior of Cisco IOS software) and  
always-compare-med (which compares MEDs whether or not the ASs of the  
compared routes are the same). A new option (external-router-id) allows  
you to compare the router ID between external Border Gateway Protocol  
(BGP) paths to determine the active path. By default, router ID  
comparison is not performed if one of the external paths is active."

--Stacy

On 07 May 2005, at 16:33, Stefan Mink wrote:

>
> Hi,
>
> is there a knob to control, wether JUNOS applies
> http://www.ietf.org/internet-drafts/draft-ietf-idr-avoid-transition 
> -01.txt
> or not?
>
> Seems to be default to apply it, isn't it?
>
>    tschuess
>              Stefan
> --
> Stefan Mink, Schlund+Partner AG (AS 8560)
> Primary key fingerprint: 389E 5DC9 751F A6EB B974  DC3F 7A1B CF62 F0D4  
> D2BA
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