[20812] in North American Network Operators' Group
Re: Linux router (don't laugh) WAS:Re: test
daemon@ATHENA.MIT.EDU (Dan Hollis)
Wed Oct 28 10:05:00 1998
Date: Tue, 27 Oct 1998 15:20:40 -0800 (PST)
From: Dan Hollis <goemon@sasami.anime.net>
To: John Fraizer <John.Fraizer@EnterZone.Net>
cc: "Roeland M.J. Meyer" <rmeyer@mhsc.com>, nanog@merit.edu
In-Reply-To: <3.0.32.19981027172934.00716170@pop3.enterzone.net>
On Tue, 27 Oct 1998, John Fraizer wrote:
> [root@core0-eth0]:~ # /sbin/route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
> Gateway-NET * 255.255.255.252 U 0 0 5 eth0
> EZone-CoLo-2xx- * 255.255.255.192 U 0 0 97 eth2
> 2xx.xx.2xx.0 * 255.255.255.0 U 0 0 6189 eth1
> xx6.28.xx.0 * 255.255.255.0 U 0 0 17 eth1:0
> xx9.201.1x8.0 * 255.255.255.0 U 0 0 27 eth1:1
> loopback * 255.0.0.0 U 0 0 0 lo
> default core1-eth0-Ente 0.0.0.0 UG 1 0 286496 eth0
We're doing similar:
$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
255.255.255.255 0.0.0.0 255.255.255.255 UH 1500 0 0 eth2
xxx.xxx.xxx.64 0.0.0.0 255.255.255.240 U 1500 0 0 eth1
xxx.xxx.xxx.160 0.0.0.0 255.255.255.224 U 1500 0 0 eth2
xxx.xxx.xxx.0 0.0.0.0 255.255.255.0 U 1500 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 3584 0 0 lo
0.0.0.0 xxx.xxx.xxx.254 0.0.0.0 UG 1500 0 0 eth0
The 255/32 route is so that the isc-dhcp server on the box will work with
win95 clients. eth2 goes to a remote customer site via DSL. So they just
plonk win95 machines on their hub and dont have to do any configuration.
This machine is a 486DX/33 with 16mb ram. Even under heavy load between
multiple ether interfaces with lots of firewall rules (eg ping -f -s 1500
from one side of the router to the other) it rarely breaks 15% cpu.
Basically linux makes a _great_ multi-ethernet router.
-Dan
