Re: RFC 2370 Update and a Proposed Change to Stub Area Behavior
Russ White <riw@CISCO.COM> Mon, 15 August 2005 21:38 UTC
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Date: Mon, 15 Aug 2005 17:28:37 -0400
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From: Russ White <riw@CISCO.COM>
Subject: Re: RFC 2370 Update and a Proposed Change to Stub Area Behavior
To: OSPF@PEACH.EASE.LSOFT.COM
In-Reply-To: <200508150601.j7F6162i019151@sj-core-4.cisco.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 First, I'll comment that I believe stub areas are still useful.... > If an application requires an area flooding scope, typically its LSA will > have the U-bit set so that the LSA be flooded as if it was understood and > avoiding the requirement that all routers understand the new LSA. With the > current specification in 2740, we cannot define new LSA with area flooding > scope for Stub / NSSA unless the U-bit is clear therefore this cause two > issues > > - We cannot have incremental deployment for a given application > - We would be defining two LS type for the same application as U-bit will be > set for regular areas and U-bit will be clear for Stub/ NSSA where all > routers have to understand the new LSA Correct. I do see some merit in suggesting that an implemenation MAY filter unknowns at a stub area ABR, as long as the network implementor is willing to accept the possible negative consequences from this action. :-) Russ - -- riw@cisco.com CCIE <>< Grace Alone -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.0.2 (Build 2424) iQA/AwUBQwEJDBEdu7FIVPTkEQK5YQCffvjVDjTfbSjZq/NAxSpqgMG7RfQAoLOK c+Q2GrKYlQwY2zd1P3sfdDqD =hjsk -----END PGP SIGNATURE-----
- RFC 2370 Update and a Proposed Change to Stub Are… Acee Lindem
- Re: RFC 2370 Update and a Proposed Change to Stub… Acee Lindem
- Re: RFC 2370 Update and a Proposed Change to Stub… Acee Lindem
- Re: RFC 2370 Update and a Proposed Change to Stub… Erblichs
- Re: RFC 2370 Update and a Proposed Change to Stub… Dave Katz
- Re: RFC 2370 Update and a Proposed Change to Stub… Mike Fox
- Re: RFC 2370 Update and a Proposed Change to Stub… Andrew Smith
- Re: RFC 2370 Update and a Proposed Change to Stub… Acee Lindem
- Re: RFC 2370 Update and a Proposed Change to Stub… Acee Lindem
- Re: RFC 2370 Update and a Proposed Change to Stub… Erblichs
- Re: RFC 2370 Update and a Proposed Change to Stub… Acee Lindem
- Re: RFC 2370 Update and a Proposed Change to Stub… Sina Mirtorabi
- Re: RFC 2370 Update and a Proposed Change to Stub… Russ White
- Re: RFC 2370 Update and a Proposed Change to Stub… Acee Lindem