Setting A Shortest Path First (Spf) Calculation Interval For Ospf; Disabling The Interface To Send Ospf Packets - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
Table 19-22 Configure whether the MTU field will be filled in when an interface
transmits DD packets
Enable an interface to fill in the MTU
field when transmitting DD packets
Disable the interface to fill the MTU field
when transmitting DD packets
By default, the interface does not fill in the MTU field when transmitting DD packets. In
other words, MTU in the DD packets is 0.

19.2.17 Setting a Shortest Path First (SPF) Calculation Interval for OSPF

Whenever the LSDB of OSPF takes changes, the shortest path requires recalculation.
Calculating the shortest path upon change will consume enormous resources as well
as affect the operation efficiency of the router. Adjusting the SPF calculation interval,
however, can restrain the resource consumption due to frequent network changes.
Perform the following configuration in OSPF view.
Table 19-23 Set the SPF calculation interval
Set the SPF calculation interval
Restore the SPF calculation interval
By default, the interval of SPF recalculation is five seconds.

19.2.18 Disabling the Interface to Send OSPF Packets

To prevent OSPF routing information from being acquired by the routers on a certain
network, use the silent-interface command to disable the interface to transmit OSPF
packets.
Perform the following configuration in OSPF view.
Table 19-24 Enable/Disable the interface to send OSPF packets
Disable the interface to send OSPF
packets
Enable the interface to send OSPF
packets
Operation
Operation
Operation
19-21
Chapter 19 OSPF Configuration
Command
ospf mtu-enable
undo ospf mtu-enable
Command
spf-schedule-interval seconds
undo spf-schedule-interval seconds
Command
silent-interface
silent-interface-number
undo silent-interface silent-interface-type
silent-interface-number
silent-interface-type