thanks for the reply brian. :) sorry for a bit lack on the info, I was thinking of using VRRP. but my 2 links are running on different interface-types isp1 runs via ethernet while the other is on an ATM interface. I only have 1 router that has an ATM interface. setting it to VRRP would cause me problems if it was a physical failure. I have a small /24 to advertise on my AS. I'll go and check on the "Performance Based Routing" you recommend.
thanks, -b On Tue, Apr 6, 2010 at 11:25 PM, Brian Feeny <bfe...@mac.com> wrote: > > There are alot more questions that need to be asked. Like how much address > space do you have to announce? What routes are you getting from each ISP? > > Assuming you are an end user, and knowing the very limited information I know > at this point, I would make sure that these two routers LAN interfaces are in > some sort of transit vlan/subnet with my downstream router, which would also > be participating in iBGP. Alternately you could have that router do > VRRP/HSRP with your two border routers, but I prefer iBGP. > > I would then setup both routers using OER (Optimized Edge Routing, i think > now known as Performance Based Routing), to handle outbound. You could just > announce your /24 out each provider (assuming that's what you had) to handle > inbound, or if you have larger than that you could announce the aggregate out > both and more specifics out each to do some type of balancing. > > Its hard to say there is a best practice here, as there are so many > scenarios. I will say that I like OeR/PfR for edge customers who are dual > homed. BGP is very arbitrary, and its nice to have some real metrics that > mean something to play with :) > > Brian > > > On Apr 7, 2010, at 1:14 AM, Beavis wrote: > >> Greetings! >> >> Want to ask out anybody on the list about a "best practice" of the >> setup below: >> >> - 2 ISP's (A & B) >> - 2 Routers (A & B) >> >> I want Router-A for ISP-A, Router-B for ISP-B and have Router-A & >> Router-B talk and be able to pass routes on each side in an event of a >> physical failure on one of the Routers. >> >> I was planning at first to setup a multi-home BGP, but I want to have >> physical redundancy as well. >> >> ASCII-diag >> >> =--[RouterA]--isp1(bgp) >> L | >> A iBGP >> N | >> =--[RouterB]--isp2(bgp) >> >> Any recommendation would awesomely appreciated. >> >> -B >> >> >> -- >> () ascii ribbon campaign - against html e-mail >> /\ www.asciiribbon.org - against proprietary attachments >> > > -- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments
