Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 424)

cluster must be in the same AS. The cluster ID can be any number from 1 - 4294967295, or an IP
address. The default is the device ID expressed as a 32-bit number.
NOTE
If the cluster contains more than one route reflector, you need to configure the same cluster ID on all
the route reflectors in the cluster. The cluster ID helps route reflectors avoid loops within the cluster.
• A route reflector is an IGP device configured to send BGP4 route information to all the clients (other
BGP4 devices) within the cluster. Route reflection is enabled on all BGP4 devices by default but
does not take effect unless you add route reflector clients to the device.
• A route reflector client is an IGP device identified as a member of a cluster. You identify a device as
a route reflector client on the device that is the route reflector, not on the client. The client itself
requires no additional configuration. In fact, the client does not know that it is a route reflector client.
The client just knows that it receives updates from its neighbors and does not know whether one or
more of those neighbors are route reflectors.
NOTE
Route reflection applies only among IBGP devices within the same AS. You cannot configure a cluster
that spans multiple autonomous systems.
This is an example of a route reflector configuration. In this example, two devices are configured as
route reflectors for the same cluster, which provides redundancy in case one of the reflectors becomes
unavailable. Without redundancy, if a route reflector becomes unavailable, the clients for that device
are cut off from BGP4 updates.
AS1 contains a cluster with two route reflectors and two clients. The route reflectors are fully meshed
with other BGP4 devices, but the clients are not fully meshed and rely on the route reflectors to
propagate BGP4 route updates.
FIGURE 32 A route reflector configuration
Configuring BGP4 (IPv4)
424 FastIron Ethernet Switch Layer 3 Routing Configuration Guide
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