[1107] in linux-net channel archive

home help back first fref pref prev next nref lref last post

Using Linux as a SLIP router

daemon@ATHENA.MIT.EDU (Raj Mathur)
Sat Sep 16 08:57:16 1995

Date: Sat, 16 Sep 95 07:24 IST(+0530)
From: raju@gratis.xgroup.ernet.in (Raj Mathur)
To: linux-net@vger.rutgers.edu
Reply-To: raju@xgroup.ernet.in

Hi,

We're running KA9Q MS-DUH boxes as SLIP routers which I would like to
replace with a Linux machine with a multi-port serial card for
dedicated leased terrestrial data circuits. We need something like 10
ports at one site. Modem speeds range from uncompressed 4800 bps to 24
kbps with compression (serial port speeds correspondingly ranging from
4800 bps to 57.6 or 115.2 kbps).

A few questions:

- Has anyone tried a similar setup? Does it look viable? We're willing
to splurge (!) on fast machines (P90? Faster?) so that the routing and
serial comms do not suffer.

- What's a good multi-port card with stable drivers under Linux? From
first impressions the Stallion and Comtrol (and perhaps Cyclom) cards
look promising. Unfortunately, the issue may just be decided by which
of these companies has representatives in India :-(

- In initial tests gated keeps rejecting RIP routes which come with a
metric of zero. Many of our existing KA9Q boxes send routes for the
local Ethernet with this metric as the default. I'm using gated-3_0_3.
Have got hold of the latest alpha version also, but errhm, you know
alpha versions :-) IAC, the new gated also rejects these routes. Is
there any solution other than reconfiguring all the KA9Q boxes? (If
not, I'll miss you guys for quite some time -- I'll be too busy
touring India!)

- I finally decided to use slattach for setting up the SLIP rather
than DIP & co; the reason is that the occasional outages on the data
line cause the modem to drop carrier, which in turn causes DIP to
exit. That's OK for a dial-up connection, but for leased circuits we
need a program which will hang onto the interface regardless. Even
slattach has problems: unless the circuit is up at the time it starts,
setting the line to SLIP mode fails. I could (and will) hack it a bit
so that it just keeps trying to set SLIP mode until it succeeds, but
is there a more elegant solution?

Any and all help gratefully accepted.

Regards,

-- Raju
-- 
 Raj Mathur           The X Group           New Delhi           India
  PGP: Fingerprint: F2 D4 4A 21 27 B0 63 FF  15 97 9D AE 9D 40 BC B8
                 2.6.i Key: finger raju@arbornet.org
                      It is the mind that moves.

home help back first fref pref prev next nref lref last post