RE: draft-dong-6man-enhanced-vpn-vtn-id-01

["Dongjie (Jimmy)" <[e-mail]>]

Hi Ron,

Thanks for your review and comment.

Your interpretation is in the right direction, while the relationship between VTN-ID and DSCP could be considered as in a hierarchical manner, and each is for different purpose. VTN-ID is used to consistently identify a virtual network with a group of network resources allocated from the network, there is no priority difference between VTNs. DSCP is used to provide class (priority) based traffic differentiation, which can be used within VTN.

Hope this helps.

Best regards,
Jie

From: ipv6 [mailto:[e-mail]] On Behalf Of Ron Bonica
Sent: Wednesday, July 29, 2020 1:45 AM
To: [e-mail]
Subject: draft-dong-6man-enhanced-vpn-vtn-id-01

Co-authors,

In Section 4.2, you say:

"There can be different implementations of reserving local network
   resources to the VTNs.  On each interface, the resources allocated to
   a particular VTN can be seen as a virtual sub-interface with
   dedicated bandwidth and other associated resources.  In packet
   forwarding, the IPv6 destination address of the received packet is
   used to identify the next-hop and the outgoing interface, and the VTN
   ID is used to further identify the virtual sub-interface which is
   associated with the VTN on the outgoing interface."

I interpret this as meaning:

-          The IPv6 destination address is solely responsible for identifying the IP next hop
-          The VTNI, along with the DSCP bits, determine how the packet is forwarded to the next-hop

So, I can think of the VTNI as "more DSCP bits".

Do I have that right?

                                                                  Ron




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