396The P (Provider) router in Figure 112 refers to a backbone router in the network of a service provider. P isnot directly connected with a CE, and is required to have the basic MPLS capability.When an ISP can use the existing IPv4/MPLS network to provide IPv6 traffic switching capability,only the PE routers must be upgraded. It is, therefore, a highly efficient solution. Furthermore, theoperation risk of the 6PE technology is very low.Prerequisites• Configure the MPLS basic capability for the IPv4 MPLS backbone.• Configure the IPv6 BGP peer on the PE switches.• If a peer group is to be specified, you must create the peer group beforehand in BGP view.Configuring basic 6PE capabilitiesTo do… Use the command… RemarksStep 1 Enter system view system-view —Step 2 Enable BGP and enter BGPview bgp as-number RequiredDisabled by defaultStep 3 Specify the AS number forthe 6PE peer or peer grouppeer { ipv4-group-name | ipv4-address | ipv6-address } as-numberas-numberRequiredNot specified by defaultStep 4 Enter IPv6 address familyview ipv6-family —Step 5 Enable the 6PE peer orpeer grouppeer { ipv4-group-name | ipv4-address } enableRequiredNot enabled by defaultStep 6 Enable the router toexchange labeled IPv6routes with the 6PE peer orpeer grouppeer { ipv4-group-name | ipv4-address } label-route-capabilityRequiredNot enabled by defaultConfiguring optional 6PE capabilitiesTo do… Use the command… RemarksStep 1 Enter system view system-view —
