[20794] in North American Network Operators' Group
Linux router (don't laugh) WAS:Re: test
daemon@ATHENA.MIT.EDU (John Fraizer)
Tue Oct 27 18:08:16 1998
Date: Tue, 27 Oct 1998 17:29:37 -0500
To: "Roeland M.J. Meyer" <rmeyer@mhsc.com>
From: John Fraizer <John.Fraizer@EnterZone.Net>
Cc: nanog@merit.edu
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Routing 3 /24's and a /26 using 3 3c905's. eth0 goes to the cisco->world.
eth1, eth1:0 and eth1:1 go to an ethernet switch that is serving machines
from the three /24's. eth2 goes to a hub for one of our co-location clients.
Attached is an mrtg graph from someone decided to throw about 8MB of
garbage our way for a few hours. This little linux router just sat there
and idled through it.
[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
[root@core0-eth0]:~ # /sbin/ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Bcast:127.255.255.255 Mask:255.0.0.0
UP BROADCAST LOOPBACK RUNNING MTU:3584 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 coll:0
eth0 Link encap:Ethernet HWaddr 00:60:08:A2:XX:XX
inet addr:2xx.1xx.xx7.xx Bcast:2xx.1xx.xx7.xx Mask:255.255.255.252
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:27965989 errors:0 dropped:0 overruns:0 frame:0
TX packets:60325424 errors:0 dropped:0 overruns:0 carrier:0 coll:81
Interrupt:11 Base address:0x6100
eth1 Link encap:Ethernet HWaddr 00:60:08:A2:XX:XX
inet addr:2xx.4x.xx4.1 Bcast:2xx.4x.xx4.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:60459559 errors:0 dropped:0 overruns:0 frame:0
TX packets:28096141 errors:0 dropped:0 overruns:0 carrier:10 coll:26
Interrupt:10 Base address:0x6200
eth1:0 Link encap:Ethernet HWaddr 00:60:08:A2:XX:XX
inet addr:2xx.x8.2x.1 Bcast:2xx.x8.2x.255 Mask:255.255.255.0
UP BROADCAST RUNNING MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 coll:0
eth1:1 Link encap:Ethernet HWaddr 00:60:08:A2:XX:XX
inet addr:1x9.xx1.xx8.1 Bcast:1x9.xx1.xx8.255 Mask:255.255.255.0
UP BROADCAST RUNNING MTU:1500 Metric:1
RX packets:1 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 coll:0
eth2 Link encap:Ethernet HWaddr 00:60:08:A2:XX:XX
inet addr:xx9.1x5.xx0.xx9 Bcast:xx9.1x5.xx0.191
Mask:255.255.255.192
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:135534 errors:0 dropped:0 overruns:0 frame:0
TX packets:62097 errors:0 dropped:0 overruns:0 carrier:0 coll:4
Interrupt:9 Base address:0x6300
At 11:24 AM 10/27/98 -0800, you wrote:
>>>Other lessons learned,
>>> Linux won't route between multiple NICs, using multiple aliases,
>>> even with ip-forwarding enabled.
>>
>>
>>Someone needs to tell one of our routers this. It has been routing between
>>multiple NICs for well over a year without any problem.
>
>In that case, I would dearly love to hear how it was done.
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John Fraizer | __ _
The System Administrator | / / (_)__ __ ____ __ | The choice
mailto:John.Fraizer@EnterZone.Net | / /__/ / _ \/ // /\ \/ / | of a GNU
http://www.EnterZone.Net/ | /____/_/_//_/\_,_/ /_/\_\ | Generation
A 486 is a terrible thing to waste...
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