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Re: [Lsr] Open issues with Dynamic Flooding

David Allan I <david.i.allan@ericsson.com> Tue, 05 March 2019 21:01 UTC

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From: David Allan I <david.i.allan@ericsson.com>
To: "tony.li@tony.li" <tony.li@tony.li>
CC: "ppsenak@cisco.com" <ppsenak@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>
Thread-Topic: [Lsr] Open issues with Dynamic Flooding
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Subject: Re: [Lsr] Open issues with Dynamic Flooding
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Got it,

thx

-----Original Message-----
From: Tony Li <tony1athome@gmail.com> On Behalf Of tony.li@tony.li
Sent: Tuesday, March 5, 2019 3:59 PM
To: David Allan I <david.i.allan@ericsson.com>
Cc: Peter Psenak <ppsenak@cisco.com>; lsr@ietf.org
Subject: Re: [Lsr] Open issues with Dynamic Flooding


Hi Dave,

> My understanding of this whole endeavor is that:
>
> - excessive flooding slows convergence
> - so we are seeking to define a reduced flooding topology
> - a failure that does not impact an FT adjacency is propagated throughout the topology and the effects of excessive flooding have been eliminated.... great.
> - a failure that does impact the flooding topology results in the topology trying to mend itself and slowing down convergence while at it.....potentially by a significant amount
> - And the current discussion is headed in the direction of what is the right heuristic to deal with this...
>
> Do I have this right?

Close.

More specifically, if there is a multiple failure that partitions the FT, how do we repair it?  Fast or safe? Choose one.

Tony

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