Re: BGP internet load-balancing

From: Chris Larson (clarson52@comcast.net)
Date: Thu Apr 08 2004 - 17:58:23 GMT-3


I am wondering if you have tried this with GLBP? Without mocking it up in
the lab I would think that it might be another alternative that might also
work. My understanding is that all members in a GLBP group balance naturally
as oppossed to HSRP and having a single primary route or MHSRP groups having
multiple vips and what is in my opinion a somewhat cumbersome config. I
haven't done it but would think it would work as well and maybe be more
robust. Might be something to look into. BTW - I see the unicast flooding
issue a lot, despite best intentions.

----- Original Message -----
From: "Moffat, Ed" <EMoffat@fsci.com>
To: "'LoizosCisco'" <david_steven2001@yahoo.com>; <ccielab@groupstudy.com>
Sent: Thursday, April 08, 2004 9:20 AM
Subject: RE: BGP internet load-balancing

> Regarding inbound load balancing:
>
> I suspect you would plan to do this via static routes on the PIX pointed
at
> MHSRP groups on the MSFCs? If so, I would take a close look at your
internal
> routing design to make sure you do not introduce any adverse affects from
> asymetric routing. Here is a good tech note regarding that problem.
>
>
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080
> 094afd.shtml#t8
>
> In any case, I doubt that the MSFC would be your bottleneck as you point
> out.
>
> -----Original Message-----
> From: LoizosCisco [mailto:david_steven2001@yahoo.com]
> Sent: Wednesday, April 07, 2004 8:20 PM
> To: ccielab@groupstudy.com
> Subject: BGP internet load-balancing
>
> I want to load balance traffic going out from a network to internet
through
> a PIX and then two WAN routers (same iBGP). I am thinking of
> LOCAL_PREFERENCE but which destination access list will be the most
> appropriate to devide the traffic ? If anyone done it can you please share
> info or any links ?
>
> Also below the PIX (with failover) I have two 6509 MSFCs (10Gb links),
will
> it be necessary to load balance traffic to the MSFCs coming in from the
> internet through the PIX ? My thought is that because the internet traffic
> is about 80 Mb when full (ATM
> lines) and the LAN links are 10Gb, there will not be a lot of load for one
> MSFC if I do not load balance.
>
> Any ideas from the experts?
>
> Thanks
>
> Loizos
>
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