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Default Route changing on its own

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by bradq 1 view

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Hi. We have a server running SCO UNIX 5.0.5. The ip address is 172.25.1.7. There is another company that connects through the hospital's network (not sure how they are configured). They run their software on our UNIX server. The hospital told us ourdefault gateway on the server should be 172.25.0.1. Things worked fine for years until they upgraded their switches/routers. Since doing so, the new equipment must be sending out broadcasts that are changing our routing table on the UNIX server. Youlose connection to the other office and have to type: route flush. This is the output you get:

default 172.25.3.121 done
hoc localhost done
206.127.80 172.25.253.4 done
206.127.100 172.25.252.2 done

You then type:
/etc/route add default 172.25.0.1 and everything starts working again but this problem keeps happening. The hospital pleads not guilty and I don't know what to shut off on our UNIX server so it won't accept the bad information from their equipment. Any ideas?

3 replies

by cavedweller

The problem seems to be an unwanted interaction between RIP (router information protocol) on the new routers and routed on your machine. Routed hears the switches RIP broadcasts and updates your routing table. Routed is started at boot time by /etc/rc2.d/S85tcp (which is a link to /etc/tcp). Comment out the section which starts routed and reboot your machine. With routed off your machine should retain your static routes.

by bradq

Hasn't happened since making the change. I think it fixed the problem. Thanks.

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