RE: BACP problem? (Re: (PM) OSPF summaries, E2 vs. E1 type ASEOSPF routes)

James Courtier-Dutton (dutton@livingston-ent.co.uk)
Wed, 5 May 1999 02:09:26 +0100

Hello
Is the statement below actually correct?
I thought the ABR should only be aggregating if they are contiguous or
special user override configuration is done on the ABR to control the
summarisation.
Static user IP addresses are unlikely to be contiguous so they don't get
summarised.

The one thing I am not 100% sure on is the following: -
Can ABRs only summarise E1 LSAs and not E2 LSAs.

Cheers
James

> -----Original Message-----
> From: owner-portmaster-users@livingston.com
> [mailto:owner-portmaster-users@livingston.com]On Behalf Of Dick
> St.Peters
> Sent: Tuesday, May 04, 1999 09:49
> To: portmaster-users@livingston.com
> Subject: Re: BACP problem? (Re: (PM) OSPF summaries, E2 vs. E1 type
> ASEOSPF routes)
>
>
> > I also think that the routes towards adresses that fall in the
> area range
> > should be advertised as 'intra-area', but I did not start a fight, since
> > I already have quite a few other ones going without any result.
>
> I suspect that a lot of the fight about this is from Livingston people
> not paying enough attention and/or from people complaining about it
> not being explicit/emphatic enough, so in the hopes of clearing some
> of the fog:
>
> 1. Routes to addresses assigned from the POOL are advertised as
> intra-area routes if the pool IS in an area's range.
>
> 2. Routes to addresses assigned from the POOL are advertised as
> external type 2 routes if the pool is NOT in an area's range.
>
> 3. Routes to addresses assigned by RADIUS are advertised as external
> type 2 routes if the address IS in an area's range.
>
> 4. Routes to addresses assigned by RADIUS are advertised as external
> type 2 routes if the address is NOT in an area's range.
>
> #1, #2, and #4 are the Right Things To Do.
>
> #3 is the problem.
>
> Routes to the pool addresses are aggregated by the portmaster. Routes
> to radius-assigned addresses could be aggregated by an area border
> router if they were intra-area routes.
>
> --
> Dick St.Peters, stpeters@NetHeaven.com
> Gatekeeper, NetHeaven, Saratoga Springs, NY, 1-800-910-6671 (voice)
> Saratoga/Albany/Amsterdam/BoltonLanding/Cobleskill/Greenwich/
> GlensFalls/LakePlacid/NorthCreek/Plattsburgh/...
> Oldest Internet service based in the 518 area code
> -
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>

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