About DR election after ospf graceful restart

Sanjay BM <sanjaybm@GMAIL.COM> Tue, 29 June 2004 21:25 UTC

Received: from cherry.ease.lsoft.com (cherry.ease.lsoft.com [209.119.0.109]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA22727 for <ospf-archive@LISTS.IETF.ORG>; Tue, 29 Jun 2004 17:25:06 -0400 (EDT)
Received: from vms.dc.lsoft.com (209.119.0.2) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <19.00DFDBE7@cherry.ease.lsoft.com>; Tue, 29 Jun 2004 17:25:06 -0400
Received: from PEACH.EASE.LSOFT.COM by PEACH.EASE.LSOFT.COM (LISTSERV-TCP/IP release 1.8e) with spool id 23728306 for OSPF@PEACH.EASE.LSOFT.COM; Tue, 29 Jun 2004 17:25:04 -0400
Received: from 216.239.56.248 by WALNUT.EASE.LSOFT.COM (SMTPL release 1.0i) with TCP; Tue, 29 Jun 2004 17:15:04 -0400
Received: by mproxy.gmail.com with SMTP id u22so447693cwc for <OSPF@PEACH.EASE.LSOFT.COM>; Tue, 29 Jun 2004 14:14:33 -0700 (PDT)
Received: by 10.38.81.1 with SMTP id e1mr17678rnb; Tue, 29 Jun 2004 14:14:33 -0700 (PDT)
Mime-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Message-ID: <60fc97be0406291414760748db@mail.gmail.com>
Date: Tue, 29 Jun 2004 14:14:33 -0700
Reply-To: Mailing List <OSPF@PEACH.EASE.LSOFT.COM>
Sender: Mailing List <OSPF@PEACH.EASE.LSOFT.COM>
From: Sanjay BM <sanjaybm@GMAIL.COM>
Subject: About DR election after ospf graceful restart
To: OSPF@PEACH.EASE.LSOFT.COM
Precedence: list
Content-Transfer-Encoding: 7bit

Hi,

I had couple of questions regarding DR election on helpers after a
OSPF graceful restart.

RFC3623 states the following:
---
When Router Y exits helper mode for X on a given network segment, it
   reoriginates its LSAs based on the current state of its adjacency to
   Router X over the segment.  In detail, Y takes the following actions:

      a) Y recalculates the Designated Router for the segment,

      b) Y reoriginates its router-LSA for the segment's OSPF area,

      c) if Y is Designated Router for the segment, it reoriginates the
         network-LSA for the segment and

      d) if the segment was a virtual link, Y reoriginates its router-
         LSA for the virtual link's transit area.
---

Question 1:
Should Router Y (helpers) recalculate the DR for the segment even when
it exits helper mode successfully i.e, when grace LSAs were flushed
before grace period expiry.

Question 2:
Assume Router X is of higher priority than Router Y and that Router X
was the BDR before going through a graceful restart. Should Router X
become the new DR for the segment when Router Y runs the DR election
after exiting helper mode?

Thanx,
Sanjay