395To do… Use the command… RemarksStep 3 Enter IPv6 address family view ipv6-family —Step 4 Configure the router as a routereflector and specify an IPv6peer or peer group as a clientpeer { ipv6-group-name | ipv6-address } reflect-clientRequiredNot configured by defaultStep 5 Enable route reflection betweenclients reflect between-clients OptionalEnabled by defaultStep 6 Configure the cluster ID of theroute reflector reflector cluster-id cluster-idOptionalBy default, a route reflectoruses its router ID as thecluster ID• In general, because the route reflector forwards routing information between clients, it is not required tomake clients of a route reflector fully meshed. If clients are fully meshed, it is recommended to disableroute reflection between clients to reduce routing costs.• If a cluster has multiple route reflectors, you must specify the same cluster ID for these route reflectors toavoid routing loops.Configuring 6PEA 6PE is a transition technology with which ISPs can use existing IPv4 backbone networks toprovide access capability for sparsely populated IPv6 networks, allowing CE routers in theseisolated IPv6 networks to communicate with IPv4 PE routers.Work mechanism of 6PEIPv6 routing information from users is converted into IPv6 routing information with labels and thenflooded into IPv4 backbone networks of ISPs through BGP sessions. When IPv6 packets areforwarded, they are labeled when entering tunnels of backbone networks. The tunnels can beGRE tunnels or MPLS LSPs.IGPs running on ISP networks can be OSPF or IS-IS. Static routing, IGP, or eBGP can be usedbetween CE and 6PE.Figure 112 Network diagram for 6PE
