Re: [LARTC] how to emulate large IP routing table

From: "yuxiao jia" <yxjia@site.uottawa.ca>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] how to emulate large IP routing table
Date: Tue, 17 Jun 2003 17:57:26 +0000	[thread overview]
Message-ID: <marc-lartc-105587298303677@msgid-missing> (raw)
In-Reply-To: <marc-lartc-105570781017242@msgid-missing>


----- Original Message ----- 
From: "deepak patwardhan" <p99deepu@yahoo.co.uk>
To: "yuxiao jia" <yxjia@site.uottawa.ca>
Sent: Tuesday, June 17, 2003 8:26 AM
Subject: Re: [LARTC] how to emulate large IP routing table


> --- yuxiao jia <yxjia@site.uottawa.ca> wrote: > Hi,
> > 
> > can you give me a example of this kind of script.
> > Does it relate with
> > routing protocol (OSPF..)?
> hmm.... I guess it relates to all. If you are using
> Gated or Zebra or cisco, juniper ... you can use
> redistribute route technique to pump in routes. But
> again there they don't have facilities to redistribute
> ranges of routes. 
> 
> for eg. 
> <some command> 192.168.1.0/24 to 192.169.1.0/24
> gateway a.b.c.d.
> 
> So one needs to write huge config files to put in
> large state routes and redistribute them into the
> required protocols.
> 
> > > > : ip route add network/mask via gateway)
> 
> If you can wrap it in a script, which takes start
> IPaddr, End IPaddr and networkmask (comman mask to
> keep things simple) you can use the script to pump in
> large routes.
> 
> The script would have a for loop kinda algorithm
> Step 1. begin with the start IP/Mask,
> Step 2. add route
> Step 3. increment Ip, go to step4 untill you reach
> endIP.
> 
> Once you have routes in kernel RT, try redistributing
> them from there to any protocol of your choice.
> 
> Am speaking very conceptual .... Hope you get my
> point. I haven't come across a readily available admin
> option to pump in large routes.
> 
> -Deepak 
> > thanks
> > 
> > yuxiao
> > > Message: 2
> > > Date: Mon, 16 Jun 2003 05:35:37 +0100 (BST)
> > > From: =?iso-8859-1?q?deepak patwardhan?> > <p99deepu@yahoo.co.uk>
> > > Subject: Re: [LARTC] how to emulate large IP
> > routing table
> > > To: lartc@mailman.ds9a.nl
> > >
> > >  --- yuxiao jia <yxjia@site.uottawa.ca> wrote: >
> > Hi
> > > all
> > > >
> > > > I am conducting the experiments comparing IP
> > router
> > > > forwarding delay and
> > > > MPLS LSR forwarding delay, it is obvious in
> > theory
> > > > MPLS in Core should be
> > > > faster than IP, but for small netork (only have
> > > > several core routers),
> > > > result show it is not, this is why I want
> > emulate a
> > > > large IP routing table
> > > > in one core router.
> > > >
> > > > can I do it and how ? right now I use static
> > routing
> > > > table (by using command
> > > Simple soultions would be write a script that
> > expands
> > > lange ranges of IP address and pumps into the
> > routing
> > > table.
> > >
> > > >
> > > > thanks anyway
> > > >
> > > > yuxiao
> > >
> > >
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