The metric parameter species the cost of the route and can be a number from 1 - 16. The default is 1.
NOTE
If you specify 16, RIP considers the metric to be innite and thus also considers the route to be
unreachable.
The tag num parameter species the tag value of the route. Possible values: 0 - 4294967295. Default: 0.
The distance num parameter species the administrative distance of the route. When comparing otherwise equal routes to a destination,
the Brocade device prefers lower administrative distances over higher ones, so make sure you use a low value for your default route.
Possible values: 1 - 255. Default: 1.
NOTE
The Brocade device will replace the static route if it receives a route with a lower administrative distance.
The name string parameter species the name assigned to a route. The static route name is descriptive and an optional feature. It does
not aect the selection of static routes.
Conguring a "null" route
You can
congure the Brocade device to drop IP packets to a specic network or host address by conguring a "null" (sometimes called
"null0") static route for the address. When the Brocade device receives a packet destined for the address, the Brocade device drops the
packet instead of forwarding it.
To congure a null static route to drop packets destined for network 209.157.22.x, enter the following commands.
device(config)# ip route 209.157.22.0 255.255.255.0 null0
device(config)# write memory
Syntax: [no] ip route { ip-addr ip-mask | dest-ip-addr /mask-bits } null0 [ metric ] [ tag num ] [ distance num ]
To display the maximum value for your device, enter the show default values command. The maximum number of static IP routes the
system can hold is listed in the ip-static-route row in the System Parameters section of the display. To change the maximum value, use
the system-max ip-static-route command at the global CONFIG level.
The ip-addr parameter
species the network or host address. The Brocade device will drop packets that contain this address in the
destination eld instead of forwarding them.
The ip-mask parameter species the network mask. Ones are signicant bits and zeros allow any value. For example, the mask
255.255.255.0 matches on all hosts within the Class C subnet address specied by ip-addr . Alternatively, you can specify the number
of bits in the network mask. For example, you can enter 209.157.22.0/24 instead of 209.157.22.0 255.255.255.0.
The null0 parameter indicates that this is a null route. You must specify this parameter to make this a null route.
The metric parameter adds a cost to the route. You can specify from 1 - 16. The default is 1.
The tag num parameter species the tag value of the route. Possible values: 0 - 4294967295. Default: 0.
The distancenum parameter congures the administrative distance for the route. You can specify a value from 1 - 255. The default is 1.
The value 255 makes the route unusable.
The last three parameters are optional and do not aect the null route, unless you congure the administrative distance to be 255. In this
case, the route is not used and the trac might be forwarded instead of dropped.
Adding a static IP route
FastIron Ethernet Switch Layer 3 Routing
144 53-1003627-04
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