Re: [mpls] working group last call on draft-ietf-mpls-spring-entropy-label

Stewart Bryant <stewart.bryant@gmail.com> Sun, 01 May 2016 17:54 UTC

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From: Stewart Bryant <stewart.bryant@gmail.com>
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Subject: Re: [mpls] working group last call on draft-ietf-mpls-spring-entropy-label
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> On 1 May 2016, at 13:05, Carlos Pignataro (cpignata) <cpignata@cisco.com> wrote:
> 
> 
>> On May 1, 2016, at 04:59, Stewart Bryant <stewart.bryant@gmail.com> wrote:
>> 
>> The per network approximation of course massively simplifies things.
> 
> If this is used, there's also non insignificant implications. You either:
> 1. Need the whole network to be upgraded in order to use this feature, or
> 2. Need to make network-wide assumptions about node's capabilities. 
> 

In an SDN network it's pretty simple of course, since the controller should know all the equipment types and hence parameters.

With a distributed routing system, the change is limited to the control plane - one new TLV - which is not great but reasonably tractable.

- Stewary