[nsp] BGP, best way to balance outgoging traffic

[Kenny Sallee]

I wouldn't solve this problem with PBR.  I'd assume
that if providers a+b both go away for some reason,
you'd want the other 2 prefixes to route through
provider c+d automatically.  Also PBR can be very load
intensive; it can kill your CPU.  Check out NetVMG
www.netvmg.com.  They build a box that I believe will
do this for you.

If I knew more about your interior network behind the
BGP routers I might be able to come up with something
else.  

Kenny

--- Mahesh S <mahesh_s at stpb.soft.net> wrote:
> Hi,
> 
> What will happen if the next hop is inaccessible for
> some reason??
> 
> Mahesh.S
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net]On Behalf
> Of Lucas Iglesias
> Sent: Monday, August 04, 2003 8:09 PM
> To: 'Lukas Krattiger'; cisco-nsp at puck.nether.net
> Subject: RE: [nsp] BGP, best way to balance
> outgoging traffic
> 
> 
> You can do this with policy-routing (be careful, it
> can load your CPU).
> An example would be this one:
> 
> route-map RM_OUTGOING1 permit 10
>  match ip address 1
>  set ip next-hop 192.168.1.1 192.168.1.5
> !
> route-map RM_OUTGOING2 permit 10
>  match ip address 2
>  set ip next-hop 192.168.1.5 192.168.1.1
> !
> 
> Assuming that 192.168.1.1 is the next-hop from a + b
> and 192.168.1.5 is from
> c + d (the set ip next-hop allow you to put
> next-hops in order, if the first
> is not reachable use the next one).
> ACL 1 must permit one group of IP source nets, and
> ACL 2 the other one.
> Finally, you must apply the route-maps to all the
> incoming customer
> interfaces, i.e.:
> 
> interface Serial5/0/1
>  ...
>  ip policy route-map RM_OUTGOING1
> end
> 
> interface Serial5/0/2
>  ...
>  ip policy route-map RM_OUTGOING2
> end
> 
> Good Luck.
> ========================
> Eng. Lucas Iglesias
> IP Engineering, Tiba S.A.
> ========================
> 
> 
> 
> 
> -----Mensaje original-----
> De: Lukas Krattiger [mailto:luk at everyware.ch]
> Enviado el: Lunes, 04 de Agosto de 2003 06:44 a.m.
> Para: cisco-nsp at puck.nether.net
> Asunto: [nsp] BGP, best way to balance outgoging
> traffic
> 
> 
> Greetings,
> 
> We are currently running our BGP with 4 upstreams
> and anounceing 6 prefixes.
> The advertisement of this 4 prefixes over upstream a
> + b and 2 prefixes
> over upstream c + d are working fine.
> What's now the best way to tell the outgoing traffic
> from all of this 2
> prefixes must take upstream c + d and the other 4
> prefixes are only allowed
> to use upstream a + b ?
> Any examples ?
> 
> Best Regards
> -Lukas
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at
> http://puck.nether.net/pipermail/cisco-nsp/
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at
> http://puck.nether.net/pipermail/cisco-nsp/
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at
http://puck.nether.net/pipermail/cisco-nsp/


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com