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DES-7200 Configuration Guide Chapter 2 Configuring BGP IP VPN
2-60
Establish a GRE tunnel between Ps
Fig 23 Scenario II: P-P
As shown in Fig 23, PE1 and PE2 are in two MPLS domains. P1 and P2 are interconnected
through IP network. The GRE tunnel is established between P1 and P2. The public-network LSP
between PE1 and PE2 goes through P1 and P2, and the GRE tunnel between P1 and P2 is one
hop of LSP.
Establish a GRE tunnel between P and PE
Fig 24 Scenario III: P-PE