Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 814)

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Configuring static routes
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• Statically configured route – You can add routes directly to the route table. When you add a
route to the IP route table, you are creating a static IP route. This section describes how to add
static routes to the IP route table.
Static route types
You can configure the following types of static IP routes:
• Standard – the static route consists of the destination network address and network mask,
and the IP address of the next-hop gateway. You can configure multiple standard static routes
with the same metric for load sharing or with different metrics to provide a primary route and
backup routes.
• Interface-based – the static route consists of the destination network address and network
mask, and the Brocade device interface through which you want the Brocade device to send
traffic for the route. Typically, this type of static route is for directly attached destination
networks.
• Null – the static route consists of the destination network address and network mask, and the
“null0” parameter. Typically, the null route is configured as a backup route for discarding traffic
if the primary route is unavailable.
Static IP route parameters
When you configure a static IP route, you must specify the following parameters:
• The IP address and network mask for the route’s destination network.
• The route’s path, which can be one of the following:
• The IP address of a next-hop gateway
• An Ethernet port
• A virtual interface (a routing interface used by VLANs for routing Layer 3 protocol traffic
among one another)
• A “null” interface. The Brocade device drops traffic forwarded to the null interface.
The following parameters are optional:
• The route’s metric – The value the Brocade device uses when comparing this route to other
routes in the IP route table to the same destination. The metric applies only to routes that the
Brocade device has already placed in the IP route table. The default metric for static IP routes
is 1.
• The route’s administrative distance – The value that the Brocade device uses to compare this
route with routes from other route sources to the same destination before placing a route in
the IP route table. This parameter does not apply to routes that are already in the IP route
table. The default administrative distance for static IP routes is 1.
The default metric and administrative distance values ensure that the Brocade device always
prefers static IP routes over routes from other sources to the same destination.