Hi,
As Linda noted in her agenda slot today, draft-dunbar-bess-bgp-sdwan-usage
version 08 introduced a new paragraph in the Introduction that says:
- The Application Routing can also be based on specific
performance criteria (e.g. packets delay, packet loos, jitter)
to provide better application performance by choosing the right
underlay that meets or exceeds the specified criteria.
Firstly, s/loos/loss/ 😊
But I am concerned by the concept of "application routing" and I note that the
term is not used elsewhere in the document nor is the concept expanded upon.
As will be seen from the Application Aware Networking (APN) effort, the concept
of traffic flows being routed according to the identity of the application is
made complicated by various privacy and security concerns, not to mention
issues of registering application identities.
Fortunately, I suspect that this draft wants to do something similar to APN:
that is, to classify the service that a particular application-sourced flow
wants to receive from the network. This may be considerably more complex than
DSCP, but the concept is the same that either a tunnel/pipe/flow is negotiated
and established for use by the application, or the packets are 'coloured' for
routing and treatment in the network.
I would suggest two things:
1. Be a lot more clear about what is meant by "application routing" possibly
even using a different term
2. Have a look at the APN work - side meeting on Thursday; see
https://github.com/APN-Community/IETF108-Side-Meeting-APN for all the details
Best,
Adrian
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