Question on draft-shiomoto-ccamp-gmpls-addressing-00.txt

[<benjamin.niven-jenkins@bt.com>]

Colleagues,

I am trying to understand section 7.4 (Separation of Control and Data Plane Traffic) of draft-shiomoto-ccamp-gmpls-addressing-00.txt better.

The draft states:
"PSC-capable nodes implementing an OOB control plane (perhaps to communicate with an optical switch) MUST NOT use the OOB control plane for data traffic.  For example, in the case of MPLS service running on top of a GMPLS LSP, if the peer PSC device is reachable via both the control plane and the data plane, control protocols such as LDP MUST NOT form adjacencies over the control plane interfaces.  This may be provided by a combination of implementation features and deployment guidelines."

So, if the control plane is OOB why must control protocols (such as LDP) NOT form adjacencies over the control plane interfaces?  This implies that LDP (for e.g.) MUST form its adjacencies over the data plane interfaces and therefore LDP is not running OOB (and therefore the control plane is not entirely OOB).

Thanks
Ben


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Ben Niven-Jenkins
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