From: Nate Cielieska (ncielieska@gmail.com)
Date: Tue Jul 08 2008 - 14:19:32 ART
Marvin,
That makes sense, appreciate the feedback. Just needed some reassurance
Regards,
Nate
On Tue, Jul 8, 2008 at 1:12 PM, Marvin Greenlee <mgreenlee@ipexpert.com>
wrote:
> You're not expected to have "instantaneous convergence". Obviously if
> there
> is a failure it may take some period of time before the other path is
> learned.
>
> However, if things never converge, or if the networks become unstable/start
> flapping due to route loops, etc, it could cause problems. If they want
> things to stabilize within a certain period of time, they would tell you in
> the section.
>
> Marvin Greenlee, CCIE #12237 (R&S, SP, Sec)
> Senior Technical Instructor - IPexpert, Inc.
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: mgreenlee@ipexpert.com
>
> Progress or excuses, which one are you making?
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Nate
> Cielieska
> Sent: Tuesday, July 08, 2008 1:08 PM
> To: Cisco certification
> Subject: Backup or Redundant routing question (General)
>
> All,
>
> So as the lab date draws near, conspiracy theories and thinking way to much
> about the day itself comes into play.
>
> Say i have a situation where a fault tolerant link is required to come up
> on
> failure of a primary link. With that link coming up, the routing domain
> changes and things start to move. For instance, say i have a backup
> interface kicking up and eigrp routes flowing to/from it. At an upstream
> point that EIGRP is being redistributed into RIP (which was the primary
> links routing protocol). Further upstream RIP is being redistributed into
> OSPF.
>
> Requirement being to allow the OSPF speaking routers to be able to route to
> a particular network in case of a failure.
>
> My question is this: If a primary link and subsequently an interface
> speaking a routing protocol dies.. how long is acceptable if a failure
> occurs to meet the requirement that the OSPF network "has connectivity" to
> the networks affected by the failed link? Is there a general concensus on
> this.
>
> Dont break the NDA please but more of an interpretation thing. In your mind
> does "have connectivity" mean immediate communication or does "have
> connectivity" mean after the primary routing protocol times out?
>
> Hope this makes sense, it barely makes sense to me but its the best i could
> do to formulate the thought.
>
>
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