Thanks Donald. Will accept all your suggestions and will update it ASAP. weiguo
________________________________ From: Donald Eastlake [[email protected]] Sent: Tuesday, June 21, 2016 6:15 To: [email protected] Cc: [email protected] Subject: [trill] Shepherd's review of draft-ietf-trill-centralized-replication-05 Hi, As the document shepherd I have done a careful review of this document and have the following comments: This draft uses "CE" and expands it as "Classic Ethernet"; however, I believe we have decided to use the expansion "Customer Equipment" that, for example, is used in RFC 7379. The draft says that BUM traffic is unicast encapsulated and is sent to a central node that SHOULD be a tree root. It would be good to say a few words about why it "SHOULD". Perhaps something like "because distribution tree roots are normally chosen to be high capacity core RBridges with many high bandwidth adjacencies". At the bottom of page 5 there appears to be a small garble where some text was dropped. Looking back at version -04, it looks like most of the problem is one line of text being dropped. In TRILL it is possible for an RBridge to hold multiple nicknames and be the distribution tree root for multiple trees. The draft should say something about what to do in that case. Presumably, to avoid unnecessary re-ordering of BUM traffic each R-nickname should direct traffic to one distribution tree. Also, a centralized node could hold multiple nicknames that it advertised as R-nicknames so perhaps the spreading over centralized nodes in Section 8 should be a spreading over R-nicknames. This would enable a network manager to direct more traffic to one centralized node and less to other centralized nodes which they might want to do if one centralized node was larger and more capable than others. In Section 11, it says that the C-nickname is set on each edge RBridges which could be a bit confusing. It sounds a bit like they are setting it on their own nickname. Should this say something more like it is set on the psuedo-nickname for each edge group. I also have a number of minor editorial suggestions which I am sending to the authors. Thanks, Donald =============================== Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA [email protected]<mailto:[email protected]>
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