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Re: Linux router (don't laugh) WAS:Re: test

  • From: Dan Hollis
  • Date: Wed Oct 28 10:00:53 1998

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





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