BGP Peers Settings
|
Setting |
Description |
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ASN |
Autonomous system number of the peer. If this autonomous system ins the same as that of the PortMaster, the peer is an internal peer. If it is different, the peer is an external peer. The autonomous system number is a 16-bit number ranging from 1 to 65535. |
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Easy Multihome |
A routing policy that combines the functions of acceptance, injection, and advertisement. Easy multihome enables an alternative method to policies for handling multihome paths from the PortMaster. It restricts the BGP routing table to accept only paths through the remote autonomous system and optionally through through one additional autonomous system. Otherwise, the PortMaster uses Assume Default. |
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Assume Default |
A policy that indicates that a default route to this external peer is created if the peer is up. You must assign a hop count value to the default routes of different peers to specify a preferred peer. |
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Hop Count |
A measurement of the distance between a source and destination that is used as a metric to compare routes. If a packet traverses six routers between source and destination nodes, the hop count for the packet will be 6 when it arrives at its destination node. |
|
State |
The state determines whether BGP peers are up or down. |
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Confederation Member |
Confederation member autonomous system (CMAS). A subdivision of an autonomous system that is recognized only by other peers within the confederation and not by peers external to the confederation. Within the confederation, each BGP peer treats only the peers in its own CMAS as internal peers. Peers in different CMASs are treated as external peers.
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Route Reflector Client |
A group of internal peers that share a common set of route reflectors. When specified, Route Reflector Client identifies a peer that is a member of the same confederation as the PortMaster. By default, this keyword is not specified. |
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Always Next Hop |
An option that identifies the PortMaster as the next hop in any update packed sent to it from the peer, even if the PortMaster determines that it is not always the best next hop choice for this peer. By default, always next hop is disabled. |
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Accept Policy |
A set of rules that determine the path and route information the PortMaster accepts from a BGP peer for further processing. Accept policy enables a BGP policy whose criteria must be met for the PortMaster to accept any IP prefix from this peer as a variable BGP route. |
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Inject Policy |
A set of rules that determine the path and route information the PortMaster takes from BGP and places into its routing table used to forward packets to their destination. The PortMaster uses the information to determine how packets it receives are forwarded to their ultimate destinations. Inject policy enables a BGP policy whose criteria must be met before the PortMaster to place any IP address prefix received from this peer in the routing table. |
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Advertise Policy |
A set of rules that determine the path and route information the PortMaster advertises to a BGP peer. Advertise policy enables a BGP policy whose criteria must be met for the PortMaster to advertise any IP address prefix to this peer. |