Re: (ASCEND) Suppress host routes

[John Coy <jcoy@anc.net>]

My suggestion is to suppress host routes, and do NOT perform
pool summary, but instead define a static route in the
Ethernet->Static Rtes menu, and then route it dynamically using
RIPv2 .

Pool summaries sometimes pick the wrong subnet mask (as you've
found).  This has happened for a while, and it even does it
in 7.0.26.

You can define the static route and route it to the reject
interface like:

Name=192.0.0.0/24
Active=Yes
Dest=192.0.0.0/24
Gateway=127.0.0.2
Metric=8
Preference=60
Private=No

Then turn on RIPv2 routing in your Ethernet->Mod Config menu.

John


John

At 01:18 PM 2/24/00 +0100, you wrote:
>I donīt know, if that is a classic, - sorry if so.
>
>Until yesterday, we see all 240 host routes of our dial-in-users (modem
>and ISDN) in our whole routers and switches-routers on the LAN. (Because
>these host routes are quite dynamic, it can be worse for modern
>route-caches-concepts, which may have to rebuild the cache, if routing
>changes.)
>
>So we decided to suppress those host-routes in our MAX-equipment
>(2x [MAX4k, 7.0.22, 2x E1]; 1x [MAX-TNT, 7.0.22, 4x E1]) with the
>"pool-summary"-option, which itself needs network-aligned address pools.
>
>We have found, that if we were using network-aligned address pools, a
>static route is advertised to the LAN, which is wrong:
>
>For example:    pool xxx.xxx.248.129 ... xxx.xxx.248.254 with
>                 pool-base-address = xxx.xxx.248.129 and
>                 assign-count = 126      (=pool-boundary -2)
>
>creates static route: xxx.xxx.248.128/32 -> Ascend-Router, which can not
>work because of the "/32". It should be "/25". So we turn RIP off at the
>Ascend and do the correct static route:
>
>xxx.xxx.248.128/25 -> Ascend-Router
>
>(and Ascend-Router -> default-gateway)
>
>which works.
>
>Now the question: Is this behavior due to 7.0.22 (is it a bug) and if, is
>it fixed in a later release?
>
>Peter Tscherner
>
>--
>Peter Tscherner                        |  Tel.:  +931/888-5847
>Universitaet Wuerzburg, Rechenzentrum  |  Fax:   +931/888-7006 oder 
>+931/707012
>Am Hubland, 97074 Wuerzburg, Germany   |  tscherner@rz.uni-wuerzburg.de
>URL: http://www.rz.uni-wuerzburg.de/mitarbeiter/tscherner/
>
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