[c-nsp] Event Manager question

[Ryan West]

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: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Manaf Al Oqlah
Sent: Thursday, August 13, 2009 6:28 PM
To: Ivan Pepelnjak; cisco-nsp at puck.nether.net
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" <ip at ioshints.info>
Sent: Thursday, August 13, 2009 10:31 PM
To: "'Manaf Al Oqlah'" <manafo at hotmail.com>; <cisco-nsp at puck.nether.net>
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:manafo at hotmail.com]
>> Sent: Thursday, August 13, 2009 4:31 PM
>> To: cisco-nsp at puck.nether.net
>> 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  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/