Hi Lizhong, This is a requirements draft and not a solutions draft where a detailed VNID format needs to be specified. The intent of the original sentence implies that either a global identifier or a local identifier (such as an MPLS label) can be used.
Are you asking for a specific change in wording - i.e. such as mentioning that a local identifier is typically exchanged via a control plane protocol? It is pretty implicit and since it is a data plane requirements draft, we did not want to get into control plane related aspects. If clarification is needed, we will be happy to be a bit more specific. Marc ________________________________ From: Lizhong Jin [mailto:[email protected]] Sent: Wednesday, May 23, 2012 4:29 PM To: LASSERRE, MARC (MARC); [email protected] Cc: [email protected] Subject: Re: New dataplane requirements draft Hi Marc, Nabil, In draft section 3.3.1.1, it describes the functions of VNID: "A VNID MUST be included in the overlay encapsulation header on the ingress NVE when encapsulating a tenant Ethernet frame or IP packet on the overlay tunnel. The egress NVE uses the VNID to identify the VN context in which the encapsulated frame should be processed. The VNID can be either a globally unique identifier (on a per-administrative domain) or a locally significant identifier. It MUST be easily parsed and processed by the data path and MAY be distributable by a control-plane or configured via a management plane." It does not implicit any format of the VNID. There are potentially two formats, one is like MPLS lable allocation which is implicit for dataplane and mapping with control plane information, the other is like VLAN format, which is explicit for dataplane and could work without control plane. In http://www.ietf.org/id/draft-kj-nvo3-pion-architecture-00.txt, section 5.3, it describes this. We should gather some requirement about this, and hope to see more comments. Lizhong
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