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Re: [NSIS] GIST peering concern
Hi,
I haven't seen any reply to this comment. Please do as I will not accept
outstanding issues when going forward with the doc.
Cheers
Magnus
Lauri J T Liuhto skrev:
> While implementing our own NSLPs and the API between GIST and NSLPs, we
> came across something in the current NTLP i-d we think might be a
> problem.
>
> In section 4.3.2 "Local Processing and Validation" it is stated that:
> "The first option (peering) MUST be chosen if the node is the final
> destination of the Query message, or if the GIST hop count has reached
> zero." We think this is problematic for at least two reasons.
>
> 1) This removes flexibility from the NSLP application and forces certain
> behaviour. Thus it complicates NSLP application logic, since the NSLP
> must be aware of this exception to its peering "wishes".
>
> 2) It could be possible to overload resources, such as memory and UDP
> send rate, of a GIST node. Sending Queries with an (intentionally)
> low GIST hop-count would lead to nodes being forced to peer, though
> it is stated in the same section (4.3.2), that a node can decline
> peering for "overload protection reasons".
>
> We suggest that an error message be defined for the case when a flow
> endpoint does not wish to peer, or that the definition of the "Endpoint
> Found" message be extended to include this case. Currently section 4.3.4
> seems to state, that "Endpoint Found" can only be sent when the NSLP is
> not present on the GIST node.
>
> Regards,
> Nuutti, Teemu and Lauri
>
--
Magnus Westerlund
IETF Transport Area Director & TSVWG Chair
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Multimedia Technologies, Ericsson Research EAB/TVM/M
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Ericsson AB | Phone +46 8 4048287
Torshamsgatan 23 | Fax +46 8 7575550
S-164 80 Stockholm, Sweden | mailto: magnus.westerlund at ericsson.com
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