Mustapha Aissaoui wrote:
Stewart, see a question below. Mustapha. -------------- Stewart Bryant wrote:Here is the proposed change to 5.4.3 that was discussed at the WG meeting. Also here is the corresponding change to section 9. The arch draft will become informational, and I will post a pre-draft of the full document with all the 07 changes incorporated some time next week. Please consider this the start of a two week last call on this change. I will put together a draft for the CW text in the next few days. - Stewart --------------------------------------------------- 5.4.3. PW Packets Aliasing IP Packets To allow accurate packet inspection in an MPLS PSN, and/or to operate correctly over MPLS PSNs that have deployed equal-cost multiple-path load-balancing (ECMP), a PW packet must not alias an IP packet. IP packets are carried in MPLS label stacks without any protocol identifier. The method of packet discrimination must therefore be based on some unique characteristic of the IP packet header, which PWE3 must not mimic. This is the subject of work in progress.
MA> I am not clear about the impact of the above paragraph on the
rest of Section 5.4.3 and on Section 5.4.4. I understand that option
3 in your presentation Monday proposes a separate "PWE3 control word
registry" which will not allow values of 4 and 6. If so, why it that
not sufficient?
It replaces 5.4.3 and 5.4.4 gets deleted.
Why add that "the method of discrimination should be based on some
unique characteristic of the IP packet header"?
The plan is to make the Arch draft as uncontroversial as possible in this area so as to allow it to get though review and unblock the other drafts. Hence I was trying not to prejudge the solution here. Hence the non-specific language. - Stewart
----------------------------------------------------- 9. IANA considerations IANA considerations will be identified in the PWE3 documents that define the PWE3 encapsulation, control and management protocols. _______________________________________________ pwe3 mailing list pwe3@ietf.org https://www1.ietf.org/mailman/listinfo/pwe3
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