Date: Tue, 28 Nov 1995 15:00:44 +0000 From: "Andrew Webster" <awebster@dataradio.com> To: freebsd-questions@freebsd.org Cc: "Garrett A. Wollman"wollman@lcs.mit.edu Subject: Routing Wierdness in FreeBSD 2.1.0 RELEASE Message-ID: <199511282000.PAA00232@vhf.dataradio.com>
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Strange routing problem...here are the symptoms:
Internet gateway box with ep0 network card configured as follows:
ifconfig ep0 inet 198.168.41.2 netmask 255.255.255.0
ifconfig ep0 alias 198.168.36.2 netmask 255.255.255.0
ifconfig ep0 alias 198.168.41.55 netmask 255.255.255.255
ifconfig ep0 alias 198.168.36.55 netmask 255.255.255.255
The 198.168.41 segment is visible to the world, the 198.168.36
segment is only visible internally.
Interface tun0 is running iijppp on a ppp link to our provider.
When I attempt to traceroute to 198.168.54.8 (ns.rezonet.net) a host
outside our domain. One of two things will happend:
1. If routed -q is running, I get this result:
55 [vhf:/home/andreww] : traceroute 198.168.54.8
traceroute to 198.168.54.8 (198.168.54.8), 30 hops max, 40 byte packets
1 fs (198.168.36.99) 2.483 ms !H 1.111 ms !H 0.964 ms !H
2. If routed is NOT running, I get this result:
52 [vhf:/home/andreww] : traceroute ns.rezonet.net
traceroute to ns.rezonet.net (198.168.54.8), 30 hops max, 40 byte packets
1 S496.InterLink.NET (198.168.61.61) 226.432 ms 191.383 ms 198.247 ms
2 MIX.NET (198.168.73.2) 197.366 ms 205.749 ms 168.272 ms
3 ns.RezoNet.NET (198.168.54.8) 197.555 ms 205.701 ms 198.371 ms
In the first case, netstat -rna does not have any entries for the
198.168.54 network so however the routing information is changing it
is happening quietly. The default route is:
default 198.168.61.61 UGc 20 3 tun0
In the second case, netstat -rna has this line in it:
198.168.54.8 198.168.61.61 UGHW 2 69 tun0
I've put a protocol tracer on both the ppp link and our internal
networks and there are no RIP packets with any information that could
cause this erratic behaviour.
Anyone have any ideas what this could be all about?
-----------------------------------------------------------------------
Andrew Webster Network Manager / Special Projects
Dataradio Inc. 200-5500 Royalmount Ave. TEL: +1 514 737 0020
Town of Mount Royal, QC, CANADA H4P 1H7 FAX: +1 514 737 7883
http://www.dataradio.com Email: awebster@dataradio.com
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