Netgear M4300-24X24F (XSM4348S) - Stackable Managed Switch with 48x10G including 24x10GBASE-T and 24xSFP+ Layer 3 Guia Do Programa
Routing Commands
726
M4200 and M4300 Series ProSAFE Managed Switches
nsf helper strict-lsa-checking (OSPF)
The restarting router is unable to react to topology changes. In particular, the restarting router
will not immediately update its forwarding table; therefore, a topology change may introduce
forwarding loops or black holes that persist until the graceful restart completes. By exiting the
graceful restart on a topology change, a router tries to eliminate the loops or black holes as
quickly as possible by routing around the restarting router. A helpful neighbor considers a link
down with the restarting router to be a topology change, regardless of the strict LSA checking
configuration.
will not immediately update its forwarding table; therefore, a topology change may introduce
forwarding loops or black holes that persist until the graceful restart completes. By exiting the
graceful restart on a topology change, a router tries to eliminate the loops or black holes as
quickly as possible by routing around the restarting router. A helpful neighbor considers a link
down with the restarting router to be a topology change, regardless of the strict LSA checking
configuration.
Use this command to require that an OSPF helpful neighbor exit helper mode whenever a
topology change occurs.
topology change occurs.
no nsf [ietf] helper strict-lsa-checking
Use this command to allow OSPF to continue as a helpful neighbor in spite of topology
changes.
changes.
OSPFv2 Stub Router Commands
max-metric router-lsa (OSPFv2 Router Configuration)
To configure OSPF to enter stub router mode, use this command in Router OSPF Global
Configuration mode. When OSPF is in stub router mode, as defined by RFC 3137, OSPF
sets the metric in the nonstub links in its router LSA to LsInfinity. Other routers therefore
compute very long paths through the stub router, and prefer any alternate path. Doing so
eliminates all transit traffic through the stub router, when alternate routes are available. Stub
Configuration mode. When OSPF is in stub router mode, as defined by RFC 3137, OSPF
sets the metric in the nonstub links in its router LSA to LsInfinity. Other routers therefore
compute very long paths through the stub router, and prefer any alternate path. Doing so
eliminates all transit traffic through the stub router, when alternate routes are available. Stub
Format
nsf ietf helper disable
Modes
OSPF Router Configuration
Default
Enabled.
Format
nsf [ietf] helper strict-lsa-checking
Modes
OSPF Router Configuration
Parameter
Description
ietf
This keyword is accepted but not required.
Default
Enabled.
Format
nsf [ietf] helper strict-lsa-checking
Modes
OSPF Router Configuration