Configuring BGP
Table 42-9
Default BGP Configuration
Feature
Aggregate address
AS path access list
Auto summary
Best path
BGP community list
BGP confederation identifier/peers
BGP Fast external fallover
BGP local preference
BGP network
BGP route dampening
BGP router ID
Default information originate
(protocol or network redistribution)
Default metric
Distance
Distribute list
Internal route redistribution
IP prefix list
Multi exit discriminator (MED)
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Default Setting
Disabled: None defined.
None defined.
Enabled.
The router considers as-path in choosing a route and does not compare similar
•
routes from external BGP peers.
Compare router ID: Disabled.
•
Number: None defined. When you permit a value for the community number, the
•
list defaults to an implicit deny for everything else that has not been permitted.
Format: Cisco default format (32-bit number).
•
Identifier: None configured.
•
Peers: None identified.
•
Enabled.
100. The range is 0 to 4294967295 with the higher value preferred.
None specified; no backdoor route advertised.
Disabled by default. When enabled:
Half-life is 15 minutes.
•
Re-use is 750 (10-second increments).
•
Suppress is 2000 (10-second increments).
•
Max-suppress-time is 4 times half-life; 60 minutes.
•
The IP address of a loopback interface if one is configured or the highest IP address
configured for a physical interface on the router.
Disabled.
Built-in, automatic metric translations.
External route administrative distance: 20 (acceptable values are from 1 to 255).
•
Internal route administrative distance: 200 (acceptable values are from 1 to 255).
•
Local route administrative distance: 200 (acceptable values are from 1 to 255).
•
In (filter networks received in updates): Disabled.
•
Out (suppress networks from being advertised in updates): Disabled.
•
Disabled.
None defined.
Always compare: Disabled. Does not compare MEDs for paths from neighbors in
•
different autonomous systems.
Best path compare: Disabled.
•
MED missing as worst path: Disabled.
•
Deterministic MED comparison is disabled.
•
Chapter 42
Configuring IP Unicast Routing
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