Subject: Query regarding LSP

From: "Dua, Vivek" <[email-masked]>
Date: Tue, 10 Apr 2001 07:17:48 -0700

Hi!,
      I have a query regarding MPLS LSPs:
      
     Consider a Scenario:

                                          |
                                          | In1
        ---------------              -----|-----------
-----------------
 In0  |             |     L1      |                |    L2       |
| Out0
 ->-- |  LERA  |------>------- |  LSR       |-------->----|  LERB
|---->----
       |             |               |                |              |
| 
       --------------                -----------------
-----------------

If a LSP is configured between LERA and LERB with LERA as the ingress router
and LERB as egress router for a particular FEC, from Ino to Out0. L1 is the
incoming label for that FEC  
to LSR and L2 is the incoming label to LERB.

Now consider a case that a IP packet arrives at interface In1 with the
Destination IP address 
belonging to the above FEC, then the question is:

SHOULD LSR PUSH label 'L2' to the IP Packet and forward it to the LERB ???

Thanks
Vivek 
--------------------------------------------------------------
Vivek Dua
Intel , Bangalore
5th Floor, Prestige Meridian I
29, M.G.Road,Bangalore-560 001
INDIA
Phone: (+91)-(80)-5550888
Fax:     (+91)-(80)-5550718

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