SmartSwitch Router User Reference Manual 105Chapter 6: BGP Configuration GuideNotes on Using Route Reflection• Two types of route reflection are supported:– By default, all routes received by the route reflector from a client are sent to allinternal peers (including the client’s group, but not the client itself).– If the no-client-reflect option is enabled, routes received from a route reflectionclient are sent only to internal peers that are not members of the client's group. Inthis case, the client's group must itself be fully meshed.In either case, all routes received from a non-client internal peer are sent to all routereflection clients.• Typically, a single router acts as the reflector for a cluster of clients. However, forredundancy, two or more may also be configured to be reflectors for the same cluster.In this case, a cluster ID should be selected to identify all reflectors serving the cluster,using the clusterid option. Gratuitous use of multiple redundant reflectors is notadvised, since it can lead to an increase in the memory required to store routes on theredundant reflectors’ peers.• No special configuration is required on the route reflection clients. From a client'sperspective, a route reflector is simply a normal IBGP peer. Any BGP version 4 speakercan be a reflector client.• It is necessary to export routes from the local AS into the local AS when acting as aroute reflector.To accomplish this, routers SSR10 and SSR11 have the following line in theirconfiguration files:• If the cluster ID is changed, all BGP sessions with reflector clients will be dropped andrestarted.ip-router policy redistribute from-proto bgp source-as 64901 to-proto bgp target-as 64901
