[alcatel-nsp] BGP mutipath, load balance 7750

[Scott Weeks]

--- dejan at karlsborgsenergi.se wrote:
From: Dejan Tepic <dejan at karlsborgsenergi.se>

I would like to try bgp-multipath 2 with ECMP 2 but 
im not sure how to go about.
Looking in route table av vprn xx on R1 I see def. 
route as tunnelled (BGP-VPN) coming from R2.
Do I enable this on both routers with same parametars 
or do I need to add some special commands as 
eibgp-multipath or ibgp-multipath
----------------------------------------------------



I will defer to the experts on this list, but I don't 
think that will work like you expect.  AFAIK, there
will only be one default route installed in the route
table to one of the providers and all traffic would 
use that link.

https://documentation.nokia.com/html/0_add-h-f/93-0074-HTML/7750_SR_OS_Routing_Protols_Guide/bgp.html

"If the best path can be installed in the route table 
and there are other BGP paths (LOC-RIB routes) for 
the same IPv4 or IPv6 prefix that are nearly as good 
as the best path the additional paths can also be 
installed in the route table. This is called 
BGP-Multipath ..."


This part: "...and there are other BGP paths (LOC-RIB 
routes) for the same IPv4 or IPv6 prefix that are 
nearly as good..." seems to preclude the default route
as there is no prefix in there, unless the default 
route is considered one by the router.

Not sure, though, so let's wait for the RGRGs. (Really 
Good Routing Guys :)

scott

























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