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Nonstop Forwarding Awareness - Cisco Catalyst 3750-E Software Configuration Manual

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Configuring BGP
Table 40-9
Default BGP Configuration (continued)
Feature
Neighbor
1
NSF
Awareness
Route reflector
Synchronization (BGP and IGP)
Table map update
Timers
1. NSF = Nonstop Forwarding
2. NSF Awareness can be enabled for IPv4 on switches with the IP services feature set by enabling Graceful Restart.

Nonstop Forwarding Awareness

The BGP NSF Awareness feature is supported for IPv4 in the IP services feature set. To enable this
feature with BGP routing, you need to enable Graceful Restart. When the neighboring router is
NSF-capable, and this feature is enabled, the Layer 3 switch continues to forward packets from the
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
40-48
Default Setting
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.
Version: BGP Version 4.
Weight: Routes learned through BGP peer: 0; routes sourced by the local router:
32768.
2
Disabled
. Allows Layer 3 switches to continue forwarding packets from a neighboring
NSF-capable router during hardware or software changes.
None configured.
Enabled.
Disabled.
Keepalive: 60 seconds; holdtime: 180 seconds.
Chapter 40
Configuring IP Unicast Routing
OL-9775-08

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