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Catalyst 3750 Switch Command Reference
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Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
nsf
nsf
Use the nsf router configuration command on the switch stack or on a standalone switch to enable and
configure Cisco nonstop forwarding (NSF) for Open Shortest Path First (OSPF) or Enhanced Interior
Gateway Routing Protocol (EIGRP) routing. Use the no form of this command to disable NSF.
nsf [enforce global]
no nsf
Syntax Description
Defaults NSF is disabled.
The enforce global option is enabled (OSPF only)
Command Modes Router configuration (OSPF or EIGRP)
Command History
Usage Guidelines The nsf command is a router configuration command and affects all interfaces that are covered by the
designated routing process. The switch supports Cisco NSF for OSPF and EIGRP protocols.
When NSF is enabled and a stack master switchover is detected, the NSF-capable routers rebuild routing
information from NSF-aware or NSF-capable neighbors and do not wait for a restart.
Examples This example shows how to enable OSPF NSF:
Switch(config)# router ospf 100
Switch(config-router)# nsf
Use the show ip ospf privileged EXEC command to verify that OSPF NSF is enabled.
This example shows how to enable EIGRP NSF:
Switch(config)# router eigrp 1
Switch(config-router)# nsf
Use the show ip protocols privileged EXEC command to verify that EIGRP NSF is enabled.
Related Commands
enforce global (Optional) Cancel OSPF NSF restart when non-NSF-aware neighbors are
detected. These keywords are visible only in OSPF router configuration
mode.
Release Modification
12.2(35)SE This command was introduced.
Command Description
router protocol-id number Enables a routing process.
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