[c-nsp] Re: [j-nsp] load balancing between multiple BGP links

[Alok]

----- Original Message ----- 
From: "Guy Davies" <Guy.Davies at telindus.co.uk>
To: "Joe Shen" <sj_hznm at yahoo.com.cn>; <juniper-nsp at puck.nether.net>
Cc: <cisco-nsp at puck.nether.net>
Sent: Wednesday, September 14, 2005 4:20 PM
Subject: RE: [j-nsp] load balancing between multiple BGP links


> Hi Joe,
>
> It can't with the physical layout you described.  BGP selects one next-hop
as the best (and only one).  The only way to load share is to have two (or
more) parallel links between just two routers.  You then create a static
route on each end via each physical next-hop to the loopback on the far end
router.  Then, you setup an ebgp multihop session between the loopbacks on
the two routers.  That then uses IGP load sharing to balance traffic across
the two parallel links.
>

Anyone knows what to expect in this scenario?

R1===========R2

EBGP multihop between them over 2 links
link 1 =10Mbps
link 2 = 20 Mbps

total traffic = 25Mbps

Is there a way to ensure that link 1 doesnt get choked?


-thanks
Alok