Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 316)

288 Multi-Service IronWare Routing Configuration Guide
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Configuring ISIS properties on an interface
Changing the hello interval
The hello interval controls how often an IS-IS interface sends hello messages to its IS-IS neighbors.
The default interval is 10 seconds for Level-1 and Level-2. You can change the hello interval for one
or both levels to a value from 1 – 65535 seconds.
To change the hello interval for Ethernet interface 2/8, enter commands such as the following.
Brocade(config)# interface ethernet 2/8
Brocade(config-if-e1000-2/8)# isis hello-interval 20
This command changes the hello interval to 20 seconds. By default, the change applies to Level-1
and Level-2.
Syntax: [no] isis hello-interval num [level-1 | level-2]
The num parameter specifies the interval, and can be from 1 – 65535 seconds. The default is 10
seconds.
The level-1 | level-2 parameter applies the change to only the level you specify. If you do not use
this parameter, the change applies to both levels.
Changing the hello multiplier
The hello multiplier is the number by which an IS-IS interface multiplies the hello interval to obtain
the hold time for Level-1 and Level-2 IS-to-IS hello PDUs. The default multiplier is 3. You can set the
multiplier to a value in the range 3 – 1000.
To change the hello multiplier for Ethernet interface 2/8, enter commands such as the following.
Brocade(config)# interface ethernet 2/8
Brocade(config-if-e1000-2/8)# isis hello-multiplier 50
This command changes the hello interval to 50. By default, the change applies to both Level-1 and
Level-2.
Syntax: [no] isis hello-multiplier num [level-1 | level-2]
The num parameter specifies the multiplier, and can be from 3 – 1000. The default is 3.
The level-1 | level-2 parameter applies the change to only the level you specify. If you do not use
this parameter, the change applies to both levels.
DIS hello interval
The DIS hello interval value is derived from the hello interval configured under the interface. The
default ISIS hellos interval is 10 sec. The default DIS hello interval is 10/3 = sec. The default values
of the DIS hello interval is not changed.
However, if you configure a hello interval of 20 for an interface, then the DIS hello interval for the
interface becomes 20/3 =6 sec.
The DIS hello multipler is the same as the hello multipler configured under the interface.
Changing the metric added to advertised routes
When the Brocade device originates an IS-IS route or calculates a route, the Brocade device adds a
metric (cost) to the route. Each IS-IS interface has a separate metric value. The default is 10.