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List:       freebsd-isp
Subject:    Re: FreeBSD as Backup Router for a CISCO router
From:       Sys Admin <admin () cb21 ! co ! jp>
Date:       2001-05-23 16:22:42
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Hello Tom,


>   As in model number.  A Cisco 2514 is the lowest end Cisco with dual
> 10Mbps ethernet interfaces you can get.  A FreeBSD box with dual NICs can
> easily exceed the performance of a 2514, especially since can you use fast
> ethernet.

 That was my experience as well. 2514 suddenly became non-responsive when we
copied some large files (totalling about 9GB) from one box (4.1.1R) to
another (4.3R) . (Boxes were in two different nets)  From the source box I
could not even ping the router. It said "No route to host" all of a
sudden. Manually adding routes didn't work either. Basically it did not respond
to machines from 1 class C net. Other net was working OK. Pretty wierd! 

>   Pretty much.  You could run a routing protocol on the routers to
> announce themselves as gateways to your hosts.  If the router stops, it
> will stop annoucing itself as a gateway.

> > > > 2. What is the better solution for a backup router ? Natd or routed ?
> > > 
> > >   Apples and oranges.  routed doesn't do routing, it routing protocol
> > > daemon for RIPv1 and RIPv2.  natd does network address translation.  You
> > > don't need routed if you don't need RIP.  You don't natd if you don't need
> > > NAT.
> > 
> >  Bit confused here. The reason I put natd is because when the router gave
> > problems, as a quick fix, I configured a gateway with natd and bridging. It
> > worked quite well. Is it a recommended alternative to a router ? 
> > 
> >  I received a personal mail recommending to use gated. Planning to study that
> > soon. 
> 
>   It depends on your network.  Obviously a bridge and a router working in
> completely different ways.

 What worried me was whether that was the correct thing to do. Natd/bridge
works OK. But is it a recommended way ?

>   gated is a routing protocol daemon like routed.  It doesn't actually do
> routing either.  The FreeBSD kernel does the routing.

 I see. Things are beginning to get cleared for me. Thanks!

>   Since it is a Cisco 2514, I would say it is probably under 5Mbps
> sustained.

 I couldn't find that spec. on Cisco site. Anyway good to know that. 

Tad. 


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