[alcatel-nsp] BGP mutipath, load balance 7750

[Dejan Tepic]

Hi Scott and thanks for you input

I dont know why we only take def. routes but nevertheless this is scenario I have right now.
I already have ibgp between R1 and R2 and only outgoing route used is one to R2. Tiebreak reason is origin. iBGP vs incomplete I know I can level the playing field with import policy and set origin to iBGP on both.

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

/Dejan

-----Ursprungligt meddelande-----
Från: alcatel-nsp <alcatel-nsp-bounces at puck.nether.net> För Scott Weeks
Skickat: den 12 mars 2020 19:30
Till: alcatel-nsp at puck.nether.net
Ämne: Re: [alcatel-nsp] BGP mutipath, load balance 7750



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

I'm  trying to accomplish load-balance over BGP in multihomed stub scenario.

We are running two SR7750 connected to two different transit providers. Only default routes are coming from transit providers.

ISP A --- R1
                |
                |
ISP B --- R2

BGP with ISP's is done within VPRN. Today, all outgoing traffic is going through ISP B

I would like to be able to load balance outgoing traffic across both ISP's and by doing that influence incoming traffic to be more evenly distributed
----------------------------------------------



Why are you only taking default routes?  If you took full routes with a default route, too, you could accomplish this better.  
You'd do iBGP between R1 and R2 along with the existing eBGP you have to each provider.  Then you could use various methods to direct the inbound/outbound traffic in the manner you want.

scott





























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