Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 224)

206 Brocade ICX 6650 Layer 3 Routing Configuration Guide
53-1002603-01
Configuring OSPF
To disable the feature, enter the no default-information-originate command.
Brocade(config-ospf-router)#no default-information-originate
Syntax: [no] default-information-originate [always] [metric value] [metric-type type]
The always parameter advertises the default route regardless of whether the router has a default
route. This option is disabled by default.
The metric value parameter specifies a metric for the default route. If this option is not used, the
default metric is used for the route.
The metric-type type parameter specifies the external link type associated with the default route
advertised into the OSPF routing domain. The type can be one of the following:
• 1 – Type 1 external route
• 2 – Type 2 external route
If you do not use this option, the default redistribution metric type is used for the route type.
NOTE
If you specify a metric and metric type, the values you specify are used even if you do not use the
always option.
Modifying SPF timers
The Layer 3 Switch uses the following timers when calculating the shortest path for OSPF routes:
• SPF delay – When the Layer 3 Switch receives a topology change, the software waits before it
starts a Shortest Path First (SPF) calculation. By default, the software waits five seconds. You
can configure the SPF delay to a value from 0 through 65535 seconds. If you set the SPF delay
to 0 seconds, the software immediately begins the SPF calculation after receiving a topology
change.
• SPF hold time – The Layer 3 Switch waits for a specific amount of time between consecutive
SPF calculations. By default, the Layer 3 Switch waits ten seconds. You can configure the SPF
hold time to a value from 0 through 65535 seconds. If you set the SPF hold time to 0 seconds,
the software does not wait between consecutive SPF calculations.
You can set the delay and hold time to lower values to cause the Layer 3 Switch to change to
alternate paths more quickly in the event of a route failure. Note that lower values require more
CPU processing time.
You can change one or both of the timers. To do so, enter commands such as the following.
Brocade(config-ospf-router)#timers spf 10 20
The command in this example changes the SPF delay to 10 seconds and changes the SPF hold
time to 20 seconds.
Syntax: timers spf delay hold-time
The delay parameter specifies the SPF delay.
The hold-time parameter specifies the SPF hold time.
To set the timers back to their default values, enter a command such as the following.
Brocade(config-ospf-router)#no timers spf 10 20