The MPLS WG Archive

[Dimitrios Pendarakis <dpendarakis@tellium.com>]

YTR,

COPS is intended to provide two main benefits:
 - The ability to outsource policy decisions to an external PDP.
 - To allow a PEP to communicate with third party, COPS compliant, PDPs.

To decide whether you need COPS, you should evaluate the relevance of these
benefits to your network, taking into account the complexity of implementing COPS.
In general, an external PDP is necessary if processing requirements of policy
decisions are too high for your LSR, if your LSR lacks the intelligence or the
flexibility to provide the functionality, or if the information needed to make the
decisions is not available locally at the PEP.

If you have already decided you need an external PDP, COPS is certainly a
valid option, if not the most appropriate. However, if you are planning to develop
the PDP on your own, you could also consider other options, such as SNMP
(as pointed out by Ping's earlier mail), LDAP,  etc. In any case, policy decisions
need only be taken at the ingress and egress nodes of an administrative domain.

Regards,

Dimitrios Pendarakis
Tellium, Inc.


"Y.T. Ramanjaneyulu" wrote:

> HI,
>
> If already discussed these things then please provide pointers to mail
> archives
>
> I am currently working on a Project which involves developing a Label
> Switched router in a MPLS domain.The core protocols which are used in this
> work are MPLS as the forwarding mechanism  and  RSVP-TE as the signalling
> Protocol.Main intention of ours is to provide Qos services to the end users in MPLS
> domain.
>
> I thought of having a Resource manager inside each LSR to manage the
> resources locally. We have policies to allow user to consume only certain amount of
> bandwidth etc.
>
> PDP generally situated in some remote machine and collecting statistics
> from allclients and making descisions .
>
>   So in our scenario is it necessary to have a PEP and a PDP (COPS
> Protocol) inside the network ???
>
>
>  Thanx in advance
>
> --
> Regards
> YTR
>
> NOTE:
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