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CE dual-homing in VPN

  • From: Ali <allal_l@yahoo.fr>
  • Date: Mon, 18 Oct 2004 18:52:24 +0200 (CEST)
  • Resent-Date: Mon, 18 Oct 2004 13:19:03 -0400

 
I appreciate your help on the following topic. a CEa is dual homed to 2 PEs. How PE3 chooses among PE1 and PE2 to send packets to addresses on CEa.
                    ________________________________
                    |                                                       |
                    |                                                       |
CEa ----------- PE1                                                  PE3
  |                                                                         |
  |                                      MPLS NETWORK         |
  -----------------PE2                                                   |
                     |                                                       |
                     |                                                       |
                     --------------------------------------------------------
 
CEa is dual-Homed on PE1 and PE2.
CEa advertises the route for prefix 10.1/16 (to PE1 and PE2)
PE1 and PE2 install a local route to 10.1/16 in their VRF.
 
PE1 advertises the route for 10.1/6 to PE3, and
PE2 does the same
 
PE3 establishes 2 LSPs: LSP1:  PE3 to PE1   and  LSP2: PE3 to PE2
 
When PE3 needs to send packets to the corresponding address, how would PE3 choose between the two PEs: PE1 and PE2. i.e, how would PE3 chosse between the 2 LSPs, LSP1 and LSP2.
 
Thank you.
Allal.

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