Not dumb at all, one of the tricky things in redundant links AND redundant routers is default routing, redundancy and load sharing are NOT good bedfellows. With two providers and two routers I generally configure full BGP routing, IBGP between the two routers and HSRP. The firewall behind the router defaults to the active router and that router either forwards out it's serial or sends the packtet to the other BGP speaking router based on it's routing table.
The question asked on this post had only one router with two serial connections, which is why I suggested dual default routes, BGP is unecessary overengineering. Gregg Malcolm wrote: > > Dave, > > I have a dumb question regarding multiple defaults. Lets say that you had a > multihomed BGP config connected to 2 different providers. Lets say that you > had 2 routers below the firewalls sourcing the default. Then take a look at > the routing tables below these 2 routers. Wouldn't nearly every routing > proto (other than RIP assuming the hop counts were the same) only list 1 > default? Wouldn't it be true that outbound traffic patterns would be based > upon metrics from the routers sourcing the default? If this is true, then > it's not really load balancing. I can think of scenarios were nearly all > outbound traffic would be destined for only 1 of the 2 links. I'm sure I'm > missing something dumb, but figured it was worth asking anyway. > > Gregg > ""MADMAN"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > First problem, BGP doesn't load share but with IOS you can source an > > interface like a loopback, see BGP and loadsharing. > > > > If you have two parallel paths to a single provider why are you doing > > BGP??? Since you choose BGP I'll assume this is an Internet connection, > > set up two default routes, ip cef global command and the configs you > > have sent and you will have symetrical outgoing loadsharing. > > > > Dave > > > > Alejandro Acosta wrote: > > > > > > Hi All, > > > This is my first message in the list. > > > I am running a BGP session with a customer. It has 2 serial links with > us > > > (Each link of 2 Mbps). The customer and me have selected per-packet > sharing > > > in order to balanced the link. > > > In this moment, the traffic that comes from the customer is very > simetric > > > in both links, however, the traffic that is sent to the customer from us > is > > > not simetric. As far as I know (if I am not wrong), if we are using load > > > balacing per-packet, the incoming and outgoing traffic should be very > very > > > similar, right?. Why only the incoming traffic is simetric in this > moment. > > > > > > This is the configuration for both interfaces in my router: > > > > > > interface Serial2/0 > > > description Link 1 > > > bandwidth 2048 > > > ip address xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx > > > no ip directed-broadcast > > > ip load-sharing per-packet > > > no ip mroute-cache > > > load-interval 30 > > > no cdp enable > > > hold-queue 1024 out > > > ! > > > > > > interface Serial2/4 > > > description Link number 2 > > > bandwidth 2048 > > > ip address xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx > > > no ip directed-broadcast > > > ip load-sharing per-packet > > > no ip mroute-cache > > > load-interval 30 > > > no fair-queue > > > no cdp enable > > > > > > Any ideas? > > > > > > Thanks > > > > > > Alejandro Acosta > > > > > > P.D. I am using IOS 12.0(7)T > > -- > > David Madland > > Sr. Network Engineer > > CCIE# 2016 > > Qwest Communications Int. Inc. > > [EMAIL PROTECTED] > > 612-664-3367 > > > > "Emotion should reflect reason not guide it" -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28993&t=28960 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
