From: Sanjay Maljure (smaljure@xxxxxxxxxxxxxxxxx)
Date: Mon Jul 19 1999 - 14:15:59 GMT-3
Hi,
Regarding filtering zones/ networks from routing updates.
The Mac desktops learn the zones through a GET-ZONE-LIST request to the
router. So if you want to prevent the router from giving its full zone list
to the desktops, you would use the "getzonelist-filter" on the ethernet
interface (the interface on which the router receives GET-ZONE-LIST
requests) of the routers.
Routers learn of zones through a ZIP request to its neighbors. The neighbor
would respond with a ZIP reply. This ZIP reply packet would consist of zone
names known to the neighbor. If you want to prevent the router from
learning certain zones/networks from its neighbors, then you use a
"zip-reply-filter" on the neighbor router (the interface on which the
neighbor receives the ZIP request)
Hope this helps with your objective
Sanjay Maljure
Scott O'Donnell wrote:
> Regarding filtering zones/ networks from routing updates.
>
> I have three routers (RA, RB, RC) connected together in a row A->B->C.
> On A & C I have active serial connections with a common zone defined
> "WANLink"
> On RA & RC I have the following Access-list
> Access-list 607 deny zone WANLink
> Access-list 607 permit addtional-zones
> Access-list 607 permit other-access.
> Int E0
> Apple Distribute-list 607 out
>
> I shutdown Apple routing for 5 minutes and bring it back up. I see that
> RB has no route for either WANLink
> segment yet if I issue "Sho Apple Zone" the WANLink zone is present
> without a Net number associated to it.
>
> Is it correct? I would thing that if RB didn't learn about the network
> WANLink is running on it would never do
> a ZIP request for it and therefore would know anything about it?
>
> Scott
>
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