[28834] in North American Network Operators' Group
Re: IGPs and services?
daemon@ATHENA.MIT.EDU (ww@shadowfax.styx.org)
Thu May 18 13:39:03 2000
From: ww@shadowfax.styx.org
To: jlewis@lewis.org
Cc: nanog@merit.edu
In-Reply-To: Your message of "Wed, 17 May 2000 22:14:58 EDT."
<Pine.LNX.4.10.10005172210490.25904-100000@redhat1.mmaero.com>
Date: Thu, 18 May 2000 13:18:42 -0400
Message-Id: <20000518171843.550FC7469@shadowfax>
Errors-To: owner-nanog-outgoing@merit.edu
-----BEGIN PGP SIGNED MESSAGE-----
Hash: RIPEMD160
>>>>> "jlewis" == jlewis <jlewis@lewis.org> writes:
jlewis> On Tue, 16 May 2000, Roeland M.J. Meyer wrote:
>> > ww@shadowfax.styx.org: Tuesday, May 16, 2000 10:34 PM
>>
>> > What is the general feeling about running routing protocols
>> on > web/dns/mail servers?
[...]
jlewis> Running a routing protocol on a unix box doesn't mean
jlewis> you're using it as a router. Perhaps he just wants OSPF
jlewis> on a few servers so they can send their packets more
jlewis> efficiently. Consider a case where you have a few access
jlewis> servers and unix servers on the same switch and a router
jlewis> connecting that POP to your backbone. Having a routing
jlewis> protocol on those unix boxes means they can send packets
jlewis> directly to the appropriate access server (or the router)
jlewis> rather than everything to the router, just to have it spit
jlewis> the packets back out headed for an access server on that
jlewis> segment.
Correct. It also means that they can inject some routing information
- -- i.e. that the ip address configured onto their loopback interface
is reachable through the ip address on their ethernet interface
subject to a certain cost. The intent is to provide an efficient
failover mechanism (one host crashes, a backup host is automatically
used since they both have the same address on their loopbacks, but the
backup is advertising it with a higher cost), as well as the ability
to easily relocate services to different machines and load balance in
a way that doesn't break if one host goes away (à la DNS round-robin)
or cost a fortune (à la local-director).
- -w
- --
Will Waites \________
ww@shadowfax.styx.org\____________________________
Idiosyntactix Ministry of Research and Development\
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.1 (OpenBSD)
Comment: Processed by Mailcrypt 3.5.5 and Gnu Privacy Guard <http://www.gnupg.org/>
iQEXAwUBOSQl5g4cK24IcAwYFAOpywP/SjUKo09WCeBW0Wjq+6znsYJ6Eh7+Tirh
Ik7To9fFie00kmpc4VSYitKFpQEBNX7qN9y0vtdq0B5hzzUbUeDqip+xM3gdPO5G
VV2wSdob84S59eruRl6zqU7+WrcCqW5kq5OG9e3U1sG/5b38jcJbFB8KgvXwthgO
I8aZhsEK6YkD/RRZNEtkLbwHvBdMXI4SpxVIY5rjWCIbmgriGHzenJ9NVOXufgqv
KeJ8617eFcgSOCZUMtopoT2Q+Iorzm1nVGLHNdI8F/vTutV0RDgSGKjhOqx9yK69
aoVLsuqzr8qVQolzNh3ZPOZh2a2YkvpgtMDVK5fsSxrqNc37/4C4aYBl
=6Zzr
-----END PGP SIGNATURE-----
