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From: kannan@oar.net (Kannan Varadhan)
Newsgroups: comp.sys.proteon
Subject: Implementing OSPF areas in a Proteon router
Keywords: Multiple questions...
Message-ID: <780@malgudi.oar.net>
Date: 30 Oct 90 21:57:41 GMT
Sender: kannan@oar.net
Organization: OARnet
Lines: 80


We are running OSPF with version 8.2 on our routers.  I have a few
questions on that score.

Problem 1:  A router has multiple static and other routes to various
networks.  How can one run OSPF on it and selectively import only
required routes into OSPF?  Note that the required routes will be/could
be/are a subset of all the static routes on that router.

Problem 2:
A router with multiple interfaces to a local network is running OSPF.
Each interface has a subnet address for the local network.  Pictorially,
this looks as


		   |  |  |	Each interface has addresses from
		  1| 2| 3|	131.183.0.0 subnet mask 255.255.255.0
		+-----------+	running RIP.
		| OSPF RTR. |
		+-----------+	Likewise, interfaces 4, 5, 6 are on
		  4| 5| 6|	131.187.0.0, mask 255.255.255.0,
				running OSPF.

The router is enables as a AS router, so that it can import RIP.

The router insists on sending the routes for all of the subnets of
131.183.0.0 through the OSPF backbone area of 131.187.0.0.  (well, we
convincing it, but we didn't have any more magic cookies we could bribe
it with).

We tried defining the 131.183.0.0 as a range, belonging to area 0.0.0.1,
but that didn't help at all.  We are wondering if we have missed out
anything. 

The OSPF documentation from Proteon says,
"Outside of the area, a single route is advertised for each address
range.  To add an address to a given area, use the following command.
This example would indicate that all subnets of the network 128.185.0.0
should belong to the area whose OSPF area ID is 128.185.0.0.

		OSPF Config> add range
		Area number [0.0.0.0]? 0.0.0.1
		IP Address [0.0.0.0]? 128.185.0.0
		IP Address mask [0.0.0.0]? 255.255.0.0".


Our OSPF configuration looks as

OSPF Config>lis all

                OSPF Protocol:          Enabled
                # AS ext. routes:       256
                Estimated # routers:    60
                External comparison:    Type 2
                AS boundary capability: Enabled
                Import EGP routes:      no
                Import RIP routes:      yes
                Import static routes:   yes
                Orig. default route:    No
                Default route type:     Type 2
                Default route cost:     1

Area ID:        0.0.0.0
Authentication: 0 (None)

Area ID:        0.0.0.1
Authentication: 0 (None)
Address ranges: (131.183.0.0     , 255.255.0.0     )


OSPF interfaces:
IP address        Cost  Rtrns  TrnsDly  Pri  Hello  Dead
131.187.40.6        10      5       1     1     10    60
131.187.48.6         1      5       1     1     10    60


Thanks,


Kannan