Cradlepoint IBR1100 User Manual page 60

User Manual / IBR1100/IBR1150
BGP
The latest version of BGP (Border Gateway Protocol) is version 4. BGP-4 is one of the Exterior Gateway
Protocols and de facto standard of Inter Domain routing protocol. BGP-4 is described in RFC1771, A Border
Gateway Protocol 4 (BGP-4). BGP is a distance vector
routing protocol, and the AS-Path framework provides
distance vector metric and loop detection to BGP
RFC1930.
BGP Editor
• Enabled: Click to enable/disable the policy. (Default:
enabled).
• Name: Unique name of the policy.
• Router-ID: This sets the router-ID of the BGP
process. The router-ID may be an IP address of the
router, but need not be – it can be any arbitrary 32-
bit number. However it *MUST* be unique within the
entire BGP domain to the BGP speaker: bad things
will happen if multiple BGP speakers are configured with the same router-ID.
• Cluster ID: Specify the cluster ID, used if the BGP cluster has more than one route reflector.
• ASN: The AS (Autonomous System) number is one of the essential elements of BGP.
• View Name: Specify a view to exchange BGP routing information without adding to the kernel routing
table.
• Distance: The Administrative Distance can be specified for each of External (EBGP), Internal (IBGP) and
Local routes, respectively. Defaults of 20, 200 and 200 will apply for any unspecified distance if any
distance is specified.
• Maximum Paths: Maximum Paths can be set greater than 1 to allow multipath routing. This setting limits
the number of paths; resources will be allocated to the limit specified whether or not all paths are used.
The first field sets a limit for both EBGP and IBGP. If desired, a different limit can be applied just to IBGP
using the second field.
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