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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter32 Configuring IP Unicast Routing
Configuring BGP
Enabling BGP Routing
To enable BGP routing, you establish a BGP routing process and define the local network. Because BGP
must completely recognize the relationships with its neighbors, you must also specify a BGP neighbor.
BGP supports two kinds of neighbors: internal and external. Internal neighb ors are in th e sam e AS;
external neighbors are in different autonomous systems. External neighbors are usually adja cent to each
other and share a subnet, but internal neighbors can be anywhere in the same AS.
Neighbor •Advertisement interval: 30 seconds for external peers; 5 seconds for internal peers.
•Change logging: Enabled.
•Conditional advertisement: Disabled.
•Default originate: No default route is sent to the neighbor.
•Description: None.
•Distribute list: None defined.
•External BGP multihop: Only directly connected neighbors are allowed.
•Filter list: None used.
•Maximum number of prefixes received: No limit.
•Next hop (router as next hop for BGP neighbor): Disabled.
•Password: Disabled.
•Peer group: None defined; no members assigned.
•Prefix list: None specified.
•Remote AS (add entry to neighbor BGP table): No peers defined.
•Private AS number removal: Disabled.
•Route maps: None applied to a peer.
•Send community attributes: None sent to neighbors.
•Shutdown or soft reconfiguration: Not enabled.
•Timers: keepalive: 60 seconds; holdtime: 180 seconds.
•Update source: Best local address.
•Vers io n: B GP Ve rs ion 4.
•Weight: Routes learned through BGP peer: 0; routes sourced by the local router:
32768.
Route reflector None configured.
Synchronization (BGP and IGP) Enabled.
Table map update Disabled.
Timers Keepalive: 60 seconds; holdtime: 180 seconds.
Table32-9 Default BGP Configuration (continued)
Feature Default Setting