>See inline > > >>From: "Howard C. Berkowitz" >>Reply-To: "Howard C. Berkowitz" >>To: [EMAIL PROTECTED] >>Subject: Re: (correction) Method and Process Scenario 5: OSPF [7:42139] >>Date: Sun, 21 Apr 2002 09:08:21 -0400 >> >> >You can originate a 0.0.0.0 route from each of the ISP connected routers. >> >Ideally, then each router on your internal network that receives both >> >0.0.0.0 routes from both originating routers will route traffic to the >> >internet based on the the 0.0.0.0 route with the best metric. >> >>You're on the right track. But what characteristics must the default >>routes have to assure a degree of load sharing? (I'm thinking of >>something specific to OSPF) > >NT: On redistribution of the default-route using OSPF's default assigment of >"E2", with a standard "metric XX" value at both POP's will allow the both >default routes to be equal-cost. Another option here would be to use the >"ospf cost" or "bandwidth" configuration commands to balance the links.
That would make the links to the ISP load balanced, but it wouldn't necessarily equalize the load in getting to them from within the enterprise. Again, you are on the right track. > > >>What is their effect on load balancing from the provider to you? >> >> > >> >I'm not sure about OSPF, but where I work we have 2 connections to the >> >internet at difference POPs, and this is the method we use. Seems to >>give >> >some load balancing, however, based on the number of users at each >>site.... >> >i.e. we have twice as many users at one site (which chooses it's closest >> >internet connection for exit to the net) as we do at the other, so we >>really >> >get a lopsided load balance, but it's what we expect. We are soon going >>to >> >be implementing BGP on the 2 routers that connect to the internet so what >>we >> >can have inbound redunancy from the internet, but we'll still leave the >> >lopsided load balancing in place as to really load balance across our >> >internet connections would each bandwidth on our OC-12, which we don't >> >want.... >> > >> >Mike W. >> >----- Original Message ----- >> >From: "Howard C. Berkowitz" >> >Newsgroups: groupstudy.cisco >> >Sent: Saturday, April 20, 2002 2:51 PM >> >Subject: (correction) Method and Process Scenario 5: OSPF Multihoming >> >[7:42092] >> > >> > >> >> Your enterprise runs OSPF internally and only takes default from one >> >> ISP, but at multiple POPs. What would this suggest you could do to >> >> achieve a degree of load-sharing among the POPs? >> >> >> >> Assume you do not run BGP. What can you do and what are its >>limitations? >> >> >> >> Don't focus on the configuration commands as what mechanisms will be >> >required. >_________________________________________________________________ >MSN Photos is the easiest way to share and print your photos: >http://photos.msn.com/support/worldwide.aspx Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42153&t=42139 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
