Netgear M5300-52G3 (GSM7352Sv2h2) - ProSAFE 48 ports managed L3 gigabit stackable switch Software Guide
Routing Commands
770
M5300, M6100, and M7100 Series ProSAFE Managed Switches
Command example:
Router# show interface dampening
Interface 0/2
Flaps Penalty Supp ReuseTm HalfL ReuseV SuppV MaxSTm MaxP Restart
0
0
FALSE
0
5
1000
2000
20
16000
0
Interface 0/3
Flaps Penalty Supp ReuseTm HalfL ReuseV SuppV MaxSTm MaxP Restart
6
1865
TRUE
18
20
1000
2001
30
2828
1500
OSPF Graceful Restart Commands
The OSPF protocol can be configured to participate in the checkpointing service, so that
these protocols can execute a graceful restart” when the management unit fails. In a graceful
restart, the hardware to continues forwarding IPv4 packets using OSPF routes while a
backup switch takes over management unit responsibility
these protocols can execute a graceful restart” when the management unit fails. In a graceful
restart, the hardware to continues forwarding IPv4 packets using OSPF routes while a
backup switch takes over management unit responsibility
Graceful restart uses the concept of helpful neighbors. A fully adjacent router enters helper
mode when it receives a link state announcement (LSA) from the restarting management unit
indicating its intention of performing a graceful restart. In helper mode, a switch continues to
advertise to the rest of the network that they have full adjacencies with the restarting router,
thereby avoiding announcement of a topology change and the potential for flooding of LSAs
and shortest-path-first (SPF) runs (which determine OSPF routes). Helpful neighbors
continue to forward packets through the restarting router. The restarting router relearns the
network topology from its helpful neighbors.
mode when it receives a link state announcement (LSA) from the restarting management unit
indicating its intention of performing a graceful restart. In helper mode, a switch continues to
advertise to the rest of the network that they have full adjacencies with the restarting router,
thereby avoiding announcement of a topology change and the potential for flooding of LSAs
and shortest-path-first (SPF) runs (which determine OSPF routes). Helpful neighbors
continue to forward packets through the restarting router. The restarting router relearns the
network topology from its helpful neighbors.
Graceful restart can be enabled for either planned or unplanned restarts, or both. A planned
restart is initiated by the operator through the initiate failover command. The
operator may initiate a failover in order to take the management unit out of service (for
example, to address a partial hardware failure), to correct faulty system behavior which
cannot be corrected through less severe management actions, or other reasons. An
unplanned restart is an unexpected failover caused by a fatal hardware failure of the
management unit or a software hang or crash on the management unit.
restart is initiated by the operator through the initiate failover command. The
operator may initiate a failover in order to take the management unit out of service (for
example, to address a partial hardware failure), to correct faulty system behavior which
cannot be corrected through less severe management actions, or other reasons. An
unplanned restart is an unexpected failover caused by a fatal hardware failure of the
management unit or a software hang or crash on the management unit.
The following switches support OSPF graceful restart:
•
M6100
•
M5300-28G3
•
M5300-52G3
•
M5300-28GF3
The following switches support OSPF graceful restart with an L3 license:
•
M5300-28G
•
M5300-52G
•
M5300-28G-POE+