about: L2 VPN over MPLS

To: "ietf at ietf.org" <ietf at ietf.org>
Subject: about: L2 VPN over MPLS
From: xiaolee <net.lee at 163.net>
Date: Thu, 4 Oct 2001 21:6:47 +0800
Sender: owner-ietf at ietf.org

hi,

    i have some doubts about when we implement L2 VPN over MPLS we SHOULD keep loop free. See draft-lasserre-tls-mpls-00.txt. why?

    why not just use such a simple algorithm described below? 

    1. if the L2 frames are received from a interface connecting to a CE, forward the frames to all other local interfaces in the same VPN, and also to all other remote PEs which sites within the same VPN are connecting to.

    2. if the L2 frames are received from other PE, just forward the frames to all local interfaces in the same VPN with the frame.

    is it like the full mesh topology for the IBGP peers?

    and what will happen, if protocol operations in this way?

    thanks.

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about: L2 VPN over MPLS

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