nanog mailing list archives

Re: IGPs and services?


From: Valdis.Kletnieks () vt edu
Date: Wed, 17 May 2000 02:39:45 -0400


On Tue, 16 May 2000 23:22:09 PDT, "Roeland M.J. Meyer" said:
What  is  the  general  feeling  about running  routing  protocols  on
web/dns/mail servers?

Technically, not a problem. However, there is a school of thought that
thinks that to be a bad policy. That routing functions should be on
appliance-level systems, like routers. There is also some merit in that
appliances are more reliable, mainly because nothing *else* can cause an
operational interrupt. Unix systems are *real* good about process
control. but, there are still some things that makes it advisable to
reboot a system, at times. If that system is ALSO a critical router then
the entire net is down until the reboot is complete. It is generally not

How about the case of a system with several network interfaces on
different subnets, and using a routing protocol to better pick which
interface to send a connection out on?

This is probably more applicable to mail servers - web and dns servers
don't have as much latitude as they sort of have to answer on the
interface they were contacted on...

                                Valdis Kletnieks
                                Operating Systems Analyst
                                Virginia Tech



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