Hi Peter Alvaro,
On 3/20/20, 8:58 AM, "Peter Psenak" <[email protected]> wrote:
On 20/03/2020 11:59, Alvaro Retana wrote:
> On March 20, 2020 at 6:22:38 AM, Peter Psenak wrote:
>
>
> ...
>>> Besides the in-line comments, I want to point out here that this
>>> specification is incomplete. It needs to have (1) a formal description
of
>>> the new MSD-Type (similar to §5/rfc8491), and (2) a discussion of the
>>> interaction with the BMI-MSD.
>>
>> sorry, I missed it.
>>
>> Entropy Readable Label Depth is defined in rfc8662.
>>
>> I have modified the text as foolows:
>>
>> "A new MSD-type [RFC8491], called ERLD-MSD is defined to
>> advertise the ERLD [RFC8662] of a given router. A MSD-Type code 2
>> has been assigned by IANA for EARLD-MSD."
>>
>> Would that be good enough?
>
> Not quite. According to rfc8662, when a new MSD is defined, the
> document MUST indicate the meaning of the absence of the MSD
> advertisement. For example, it says this about the BMI-MSD: "The
> absence of BMI-MSD advertisements indicates only that the advertising
> node does not support advertisement of this capability."
ok, I will add that.
>
>
> Also, I need you to talk about the interaction between ERLD-MSD and
> BMI-MSD. If both are present, what should happen? Should one take
> precedence, should both be ignored, can they coexist without issues???
how are BMI-MSD and EARLD-MSD related?
BMI-MSD signals the total number of MPLS labels that can be imposed.
EARLD-MSD - is defined as the number of labels a router can both:
a. Read in an MPLS packet received on its incoming interface(s)
(starting from the top of the stack).
b. Use in its load-balancing function.
I don't really see why one would affect the other.
I agree. BMI-MSD is an egress capability and ERLD-MSD is an ingress capability.
While they may be related in the internal ASIC implementation, they are
independent from a capability perspective.
Thanks,
Acee
thanks,
Peter
>
>
> Thanks!
>
> Alvaro.
>
>
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