[quagga-dev 4630] Re: OSPF on parallel Unnumbered PPP links

Paul Jakma paul at clubi.ie
Fri Mar 16 10:53:37 GMT 2007

On Fri, 16 Mar 2007, Daniel Ng wrote:

> There are at least 2 solutions:
> 1) Have OSPF enabled on *both* PPP links simultaneously. Because 
> the 2 PPP links will share the same IP addresses, make any 
> necessary changes to zebra and ospfd so that they will be able to 
> distinguish between interfaces given an IP address *as well as* the 
> interface name (ie. perhaps the 'ifindex'?).
> -OR-
> 2) Somehow have OSPF enabled on ppp3 as soon as ppp2 is cut. Quagga 
> knows they both go to the same remote node because they have been 
> allocated the same IP address.
> What do you think? Which would be easier to implement? Which would 
> be better to implement?

You want two things:

- Have zebra keep a table of addresses so it can flag unnumbered
   addresses (do it in zebra to avoid every client replicating this)

- modify ospfd to support OSPF unnumbered interfaces

It should be implementable in a couple of weeks.

Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
the router thinks its a printer.

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