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DES-7200 Configuration Guide Chapter 2 Configuring BGP IP VPN
2-110
2.5.7 Inter-AS VPN OptionC:
Enabling IPv4 Label Exchange
Between Both EBGP and IBGP
Neighbors
Requirement: One VPN user has sites at both ASs. It is required that the VPN sites in different
ASs access each other.
Figure 18 OptionC: enabling IPv4 label switching between both EBGP and IBGP neighbors
The configuration scheme is as follows:
PE1-AS1:
# Configure the loopback interface.
DES-7200# configure terminal
DES-7200(config)# interface loopback 0
DES-7200(config-if-Loopback 0)# ip address 1.1.1.1 255.255.255.255
# Configure the VRF.
The configuration procedure is similar to that of PE1-AS1 in Inter AS VPN OptionB: Next Hop
Unchanged and is not described here.