<ppvpn> <draft-shah-mpls-l2vpn-ext-00.txt>

["Shah, Himanshu" <hshah@tenornetworks.com>]

Bert and Scott
--------------------

NAME OF I-D:
	http://www.ietf.org/internet-drafts/draft-shah-mpls-l2vpn-ext-00.txt
 
SUMMARY
    The Provisioning of VPN based on Layer 2 circuits across MPLS-base 
    network has been described in draft-kompella-mpls-l2vpn-02.txt. The 
    draft describes how provider's edge routers distribute configured 
    VPN information amongst themselves. This information is then 
    processed to map layer 2 circuits of customer's edge devices to 
    remote customer devices of the same VPN through MPLS cloud via 
    adjoining provider's edge devices. The proposal requires a priori 
    guestimating of customer's growth needs for the VPN and accordingly 
    over provisioning of a contiguous set of (preferably per platform) 
    MPLS labels. 

    Unfortunately, when the actual needs exceed the already provisioned 
    and advertised labels, incrementing to higher range causes 
    disruptions in ongoing data traffic.

    This document proposes extension to draft-kompella-mpls-l2vpn-02.txt 
    such that range on provider's edge router can be increased for the 
    MPLS labels without requiring to being contiguous for all the 
    customer edge devices. Also, when the range is increased to 
    accommodate more customer edge devices into the existing VPN, the 
    processing of increased range advertisement does not disturb the 
    ongoing data traffic on existing layer 2 circuits.

 

RELATED DOCUMENTS

   http://www.ietf.org/internet-drafts/draft-kompella-mpls-l2vpn-02.txt
   http://www.ietf.org/internet-drafts/draft-shah-mpls-l2vpn-reduce-00.txt

 
WHERE DOES IT FIT IN THE PICTURE OF THE SUB-IP WORK

 
   PPVPN

 
WHY IS IT TARGETED AT THIS WG

   Other document that can be merged with this one to make one
   complete work item is -

    draft-kompella-mpls-l2vpn-02.txt
    draft-shah-mpls-l2vpn-reduce-00.txt

  
JUSTIFICATION

  The PPVPN WG has already identified L2VPN work as the justified charter
  of the work group. The base draft from draft-kompella-mpls-l2vpn-02.txt
  does not address unavaibility of contiguous label resources and the
  the mechanisms whereby new VPN clients can join without disturbing the
  ongoing traffic with existing members. This draft resolves these issues.

      

Himanshu Shah
Tenor Networks
Acton, MA