Bgp Confederation Settings - D-Link xStack Reference Manual

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
Route Reflector
Cluster ID
Client to Client
Reflection
IP Address
Peer Group Name
State
Click the Apply button to accept the changes made for each individual section.

BGP Confederation Settings

This window is used to configure BGP confederation. A confederation, which is represented by an AS, is a group of
the sub AS. A confederation can be used to reduce the internal BGP (iBGP) mesh by dividing a large single AS into
multihop sub AS. External peers interact with the confederation as if it is a single AS. Each sub AS is fully meshed
within itself and it has connections to other sub ASes within the confederation. The next hop, Multi Exit
Discriminator (MED), and local preference information is preserved throughout the confederation, allowing users to
retain a single Interior Gateway Protocol (IGP) for all the autonomous systems.
To view the following window, click L3 Features > BGP > BGP Confederation Settings, as shown below:
The fields that can be configured are described below:
Parameter
Confederation Identifier
(0-4294967295)
Enter the IP address of the cluster ID. The route reflector and its clients together form a
cluster. When a single route reflector is deployed in a cluster, the cluster is identified by
the router ID of the route reflector. The BGP cluster ID command is used to assign a
cluster ID to a route reflector when the cluster has one or more route reflectors. Multiple
route reflectors are deployed in a cluster to increase redundancy and to avoid a single
point of failure. When multiple route reflectors are configured in a cluster, they must be
configured with the same cluster ID. This allows all route reflectors in the cluster to
recognize updates from peers in the same cluster and reduces the number of updates that
needs to be stored in BGP routing tables. Setting the cluster ID to 0.0.0.0 will remove
specifications of the cluster ID. The default value is 0.0.0.0.
Enable or disable client-to-client reflection. When Enabled, the reflector operates in
reflector mode. When Disabled, the reflector operates in non-reflector mode. This means
the router will not reflect routes from the route reflect client to other route reflect clients,
but it will still send routes received from a non-reflecting client to a reflecting client.
Click the radio button and use the drop-down menu to select the IP address of the
neighbor to be configured.
Click the radio button and use the drop-down menu to select the name of the peer group.
Use the drop-down menu to enable or disable the state. When Enabled, the specified
neighbor will become the router reflector client. By default, this state is Disabled.
Figure 6-160 BGP Confederation Settings window
Description
Enter an Autonomous System number which is used to specify a BGP
confederation. If it is set to zero, the BGP confederation number is deleted. By
default, this setting is zero.
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