Manaf, Do you have an iBGP peer between the 7600's? Why not just create IGP between the two 7600's or use next-hop-self between the peers and set the default-route received from each other to be higher than the backup default. ISP1 primary local-pref 110, unchanged local-pref for iBGP and then local-pref of 90 for backup link of ISP2 on router 1 and then vice-versa on router 2.
Load Sharing with BGP -> http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml If you're feeling brave later, you can look into OER/PfR. -ryan -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Manaf Al Oqlah Sent: Thursday, August 13, 2009 6:28 PM To: Ivan Pepelnjak; [email protected] Subject: Re: [c-nsp] Event Manager question Hello Ivan, Thank you for your response. In my design, I am load sharing the traffic by multihomed BGP with two ISPs through two local 7600 routers. To avoid any single point of failure, we have a backup link for each ISP connected to each local router. as below: Router1 connected with primary link of ISP1 and backup link of ISP2. Router2 connected with primary link of ISP2 and backup link of ISP1 I only receive default-route from each ISP (primary bgp peer has higher local preference on each router). my network is divided into two subnets (x.x.32.0/20 & x.x.48.0/20) normally, x.x.32.0/20 go through Router1 & ISP1, and x.x.48.0/20 go through Router2 & ISP2 incoming and outgoing. what I need is, once the primary BGP peer of ISP1 on Router1 goes down, the subnet x.x.32.0/20 go to backup link on Router2 which is already has a preferred default route from ISP2 serving the subnet x.x.48.0/20. The same case should be applied vice versa. load sharing for incoming traffic is working properly, but my problem is with outgoing traffic since I am only receiving default-route from each ISP! I know it is a bit complicated but I hope you can give me some help. Thank you, Manaf -------------------------------------------------- From: "Ivan Pepelnjak" <[email protected]> Sent: Thursday, August 13, 2009 10:31 PM To: "'Manaf Al Oqlah'" <[email protected]>; <[email protected]> Subject: RE: [c-nsp] Event Manager question > Absolutely, with EEM 3.0 an applet can be triggered with an SNMP trap or > inform. The details are here (although the article describes a slightly > different task): > > http://wiki.nil.com/Trigger_EEM_applets_with_SNMP_Informs > > However, are you absolutely positive there is no other way to get what you > need? In many cases you could use a smart routing design instead of the > PBR. > > Ivan > > http://www.ioshints.info/about > http://blog.ioshints.info/ > >> -----Original Message----- >> From: Manaf Al Oqlah [mailto:[email protected]] >> Sent: Thursday, August 13, 2009 4:31 PM >> To: [email protected] >> Subject: [c-nsp] Event Manager question >> >> >> Hi all, >> >> Can I configure event manager to be started when it gets >> notification from another router. for example, I want router1 >> to be configured with policy based routing on a specific >> interface once the bgp peer on router2 is down. I don't want >> to permanently configure the PBR since it is consume very >> high CPU utilizing on router1 >> >> Thank you, >> Manaf >> > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
