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DES-7200 Configuration Guide Chapter 2 Configuring BGP IP VPN
2-24
Setting Up an MP-EBGP Session Between ASBRs
Configuring Route Map Rules to Filter VPN Routes (Optional)
Configuring Route Exchanging Between PEs and CEs
This procedure is similar to Configuring Route Exchanging Between PEs and CEs and is not
described here.
Configuring an IGP and MPLS Signaling Protocol in an AS
This procedure is similar to Configuring an MPLS Network and is not described here.
Configuring an ASBR to Cancel the Default RT Filtering Function
This procedure is similar to Configuring an ASBR to Cancel the Default RT Filtering Funtion in
Scheme 1 and is not described here.
Setting Up an MP-IBGP Session Between an ASBR and PE and Modifying the Next Hop Address as its Own
Address
By default, an ASBR does not modify the next hop of the VPN route received from an MP-EBGP
peer when the ASBR sends the route to the MP-IBGP peer. You can configure the ASBR to
forcibly modify the next hop of the VPN route to the ASBR address in the local AS. In this manner,
the PEs in the local AS are not required to learn the address of the peer ASBR. This is the major
difference with Scheme 1 (Next Hop Unchanged Scheme).
Enter the privilege mode and perform the following configuration procedure:
Command Function
DES-7200# configure terminal
Enter the global configuration mode.
DES-7200(config)# router bgp
asn-num
Enable BGP and enter the BGP configuration mode.
DES-7200(config-router)#
neighbor pe-address remote-as
asn-num
Set up an IBGP session with a PE.
DES-7200(config-router)#
neighbor pe-address
update-source interface-name
Specify the local loopback interface as the source
address to set up an IBGP session.
DES-7200(config-router)#addres
s-family vpnv4
Enter the BGP VPN address family configuration
mode.