Re: Node and CC ID types in LMP

[Baktha Muralidharan <muralidb@cisco.com>]

Hi Dimitri,

          Thanks for pointing out that Node ID, per OIF UNI,
         needs to be either IPv4 or IPv6.  I probably got mixed
         up with connection end-point, which can be TNA
         (and hence NSAP).

         I am a bit confused however, about how a CC ID is
         then packed into LMP control messages; with just
         a c-type of 1, how will the neighbor interpret the
         CC ID?

Thanks,

/Baktha

At 09:56 PM 1/4/2002 +0100, Dimitri Papadimitriou wrote:
>Bakhta,
>
>OIF's UNI allows for (IP) CCID to be either unnumbered (Node ID &
>IF_Index) or numbered and allows for Node ID (ie UNI-C or UNI-N ID)
>to be either IPv4 (or IPv6 but let for next UNI version(s)). So I
>don't know where you found that the Node ID can be an NSAP in
>this doc...
>
>Per OIF UNI:
>"An IPCC may be numbered, in which case it is identified by an IPv4
>address at each end. If it is unnumbered then it is identified by the
>combination of the Node ID and an interface index at each end. In the
>case of numbered IPCC, migration to IPv6 addressing will depend on the
>proliferation of IPv6 capable UNI-C and UNI-N nodes."
>
>[...]
>
>"Under UNI 1.0, the Node ID is an IPv4 address, which must be unique
>within the domain of operation of the communicating UNI-C and UNI-N
>nodes." [...] "Migration to IPv6 addressing for the Node ID will depend
>on the proliferation of IPv6 capable UNI-C and UNI-N nodes".
>
>So numbered IPCC would have (for future UNI version) to encompass
>IPv6 addressing as well.
>
>However, in LMP I-D, one defines the CCID as follows:
>" Rather, a node-wide unique 32-bit non-zero integer control channel
>identifier (CCId) is assigned at each end of the control channel. This
>identifier comes from the same space as the unnumbered interface Id."
>
>Therefore only the Node_ID would need to allow IPv6 in addition to what
>is currently defined in LMP I-D.
>
>Cheers,
>- dimitri.
>
>Baktha Muralidharan wrote:
> >
> > Jonathan
> >         As you are preparing to update the LMP draft,  could please
> >         consider the following ?
> >
> >         Per the draft-ietf-ccamp-lmp-02 draft, CC ID and Node ID
> >         can only of  one type (c-type = 1). OIF's OUNI however allows
> >         for CC ID to be either unnumbered or numbered (IPv4, I assume)
> >         and allows for node IDs to be of one of  IPv4/IPv6/NSAP types.
> >
> >         Given that OUNI points to the CCAMP LMP, I would think that we
> >         would want to allow for them?
> >
> > Thanks
> >
> > /Baktha