Re: (PM) OSPF over dialup link

Blaz Zupan (blaz@gold.amis.net)
Sat, 17 Jan 1998 18:56:18 +0100 (CET)

> > Just in case someone asks why this would be needed, how about a remote POP
> > connected with frame relay and the frame link going down? I have a bunch
> > of users using static IP's and subnets and they should be able to dial to
> > any of the POP's. RIP just won't work in this application and static
> > routing also won't, of course.
>
> While OSPF over dialup links might be a "cool thing", the specific reasons
> you cite in the last paragraph can ALREADY be done....by using appropriate
> RADIUS entries.
>
> First case: analog backup in case frame goes down: set up a radius entry
> called (e.g.) "frbackup" which routes the appropriate subnet(s) to the
> connection.

You have misread my message. Yes, I know about radius-added static routes
which are cool and everything and I of course use them myself to route
subnets to specific customers, but how would I propagate a dynamically
added route through my backbone to the other POP's?

Let's say we have 3 POP's and a central location like this:

CENTRAL-POP
/ | \
/ | \
POP1 POP2 POP3

A user can login to any of the 3 POP's (and also to the central POP) and
still use the same static subnet or IP. Can you please explain to me how
that could be accomplished without OSPF or other routing protocol?

> Similar things can be done to route subnets to dialup customers without
> requiring static routes all over the place :)

No, what I wan't can't be done without OSPF (or other routing protocols).

Blaz Zupan, blaz@amis.net, http://www.amis.net/staff/blaz
Medinet d.o.o., Linhartova 21, 2000 Maribor, Slovenia

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