Cisco Catalyst 3550 Series User Manual

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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 31 Configuring IP Unicast Routing
Configuring BGP
For detailed descriptions of BGP configuration, refer to the “Configuring BGP” chapter in the Cisco IOS
IP and IP Routing Configuration Guide. For details about specific commands, refer to the Cisco IOS IP
and IP Routing Command Reference for Release 12.1. For a list of BGP commands that are visible but
not supported by the switch, see Appendix C, “Unsupported CLI Commands in Cisco IOS Release
12.1(19)EA1.”
Default BGP Configuration
Table 31-11 shows the basic default BGP configuration. For the defaults for all characteristics, refer to
the specific commands in the Cisco IOS IP and IP Routing Command Reference for Release 12.1.
Table 31-11 Default BGP Configuration
Feature Default Setting
Aggregate address Disabled: None defined.
AS path access list None defined.
Auto summary Enabled.
Best path
• The router considers as-path in choosing a route and does not compare similar
routes from external BGP peers.
• Compare router ID: Disabled.
BGP community list
• 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).
BGP confederation identifier/peers
• Identifier: None configured.
• Peers: None identified.
BGP Fast external fallover Enabled.
BGP local preference 100. The range is 0 to 4294967295 with the higher value preferred.
BGP network None specified; no backdoor route advertised.
BGP route dampening 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.
BGP router ID The IP address of a loopback interface if one is configured or the highest IP address
configured for a physical interface on the router.
Default information originate
(protocol or network redistribution)
Disabled.
Default metric Built-in, automatic metric translations.
Distance
• 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).

Cisco Catalyst 3550 Series Specifications

General

Brand	Cisco
Model	Catalyst 3550 Series
Category	Network Router
Language	English