[quagga-users 9200] Re: Multiple neighbors at same IP address

Steele, John jsteele at eds.com
Thu Dec 6 11:49:04 GMT 2007

Can you virtualise your BGP machines and get round you problem that way?

I am currently running 20 FreeBSD instances, each with Quagga, in one
VMWare Server host (W2K3) very successfully to represent a large network
in a development environment. The limit is not the performance of the
host but the number of VMs that can be hosted (max 25 with current
version of VMWare Server - beta version 2 I think the limit has been

John Steele
EDS Defence

-----Original Message-----
From: quagga-users-bounces at lists.quagga.net
[mailto:quagga-users-bounces at lists.quagga.net] On Behalf Of Paul Jakma
Sent: 06 December 2007 09:51
To: Brighten Godfrey
Cc: quagga-users at lists.quagga.net
Subject: [quagga-users 9199] Re: Multiple neighbors at same IP address

On Wed, 5 Dec 2007, Brighten Godfrey wrote:

> according to whatever topology I want to test.  I'd like to run large 
> topologies but I'm limited right now by the number of machines/IP 
> addresses. So I'd like to run perhaps 10-100 instances of bgpd on each

> machine.  The problem I'm running into seems to be that a neighbor is 
> named by IP address in the config file, not by IP+port.

Unless you want to get your hands quite dirty, you're going to need an
ID per bgpd I'm afraid. IPs are very cheap though (10/8). ;)

CVS has the ability to bind bgpd to a specific IP, making it easy to run
many bgpd instances on a machine. See also tools/multiple-bgpd.sh for a
script to launch them.

Such instances set BGP_NO_FIB though, stopping them from sending routes
to zebra. However, I gather you've hacked your own hooks into bgpd and
don't use zebra, so that probably won't bother you (except you might
need to change the location of your hooks..).

Paul Jakma,
Solaris Networking                       Sun Microsystems, Scotland
http://opensolaris.org/os/project/quagga tel: EMEA x73150 / +44 15066
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