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What is a route reflector client?
The Quick Definition: Route reflectors are networking routing components specific to border gateway protocol, commonly known as BGP. Route reflectors are an alternative to the full-mesh requirement of internal BGP (IBGP), and act as a focal point for IBGP sessions.
What is a route reflector and why would you need one?
Route reflectors (RR) are one method to get rid of the full-mesh of IBGP peers in your network. The other method is BGP confederations. The route reflector allows all IBGP speakers within your autonomous network to learn about the available routes without introducing loops.
What is a route reflector cluster?
Route Reflector Cluster ID is a four-byte BGP attribute, and, by default, it is taken from the Route Reflector’s BGP router ID. If two routers share the same BGP cluster ID, they belong to the same cluster. Before reflecting a route, route reflectors append its cluster ID to the cluster list.
What is cluster list?
The Cluster List lists the clusters and related concepts in the mine along with the number of documents in that cluster. Clusters are in order by ID number, and the top three concepts within each cluster (based on importance or significance to the mine) appear in the Name column.
Where is the best place to install a router reflector?
From a topology perspective, the route-reflectors are best placed centrally. This helps to prevent sub-optimal routing. Regular BGP speakers may peer with Route Reflectors, or other non-RR’s. Ideally, it’s best to have all non-RR’s peering with route-reflectors.
How do you set next hop in BGP?
In an external BGP (eBGP) session, by default, the router changes the next hop attribute of a BGP route (to its own address) when the router sends out a route. The BGP Next Hop Unchanged feature allows BGP to send an update to an eBGP multihop peer with the next hop attribute unchanged.
What is the use of BGP cluster ID?
The BGP—Multiple Cluster IDs feature allows a route reflector (RR) to belong to multiple clusters, and therefore have multiple cluster IDs. An RR can have a cluster ID configured on a global basis and a per-neighbor basis. A single cluster ID can be assigned to two or more iBGP neighbors.