UCC uplink (was Re: [tech] UCC<->Guild Bridge)

Nick Bannon nick at ucc.gu.uwa.edu.au
Wed May 16 22:17:28 WST 2001


On Wed, May 16, 2001 at 10:01:50AM +0800, James Devenish wrote:
> The fan in your bridge is no longer moving air. (It's an HP LANline
> 5220.) (Well, occasionally it doesn't and the rest of the time it does
> but makes a lot of noise doing it.)

If it should die, it's not a tragedy - it's mostly obsolete now that
everything's coming in through hydra. In fact, we should try
disconnecting it and see if our performance to the UWA LAN is limited
by it. Its purpose was to shorten the 10Base2 run and stop breakages
on our side from affecting the Guild.

Which reminds me... WaveLAN did not in fact get a solid go last Friday
because we got stuck trying to set up the Cisco as a backup router.

The important bits of the UCC network and uplink look like this:

     130.95.13.0/26
...-----------------.
     Machine room   |
          ,---------+------------.                       ,-------------
          |    130.95.13.3       |      Guild network    |
          |                      |     130.95.100.0/24   | ucsrouter
          |          130.95.13.1 +-----------------------+ 130.95.100.1
          |       hydra          |                       |
          |    130.95.13.65      |                       |
          `---------+------------'                       `-------------
       Clubroom     |
...-----------------'
     130.95.13.64/26

The trick to this setup is:
iface eth1 inet static
        address 130.95.13.1
        netmask 255.255.255.255
        up route add -net 130.95.100.0/24 dev eth1
        up route add default gw 130.95.100.1 dev eth1

...but try as we might, we could not make mudpuppy (the AGS+, running:
ROM: System Bootstrap, Version 11.0(21), SOFTWARE
ROM: GS Software (GS3-K-M), Version 11.0(21), RELEASE SOFTWARE (fc1)
) put anything smaller than a /28 (we wanted a /32, effectively a
point-to-point) on the interface we were going to make the uplink. Shig
recently suggested making it an ip unnumbered interface and adding
130.95.13.1 as a secondary IP on the 130.95.13.3 interface.

So... the sensible alternative to all this is to get assigned an IP on
the Guild network to use as a router interface, in 130.95.100.0/24 .

So - James - can we have an IP please? ::-)

Nick.

-- 
  Nick Bannon  | "I made this letter longer than usual because
nick at it.net.au | I lack the time to make it shorter." - Pascal




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