Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 66)

This feature allows the Layer 3 switch to adjust to changes in network topology. The Layer 3 switch
does not continue trying to use routes on unavailable paths but instead uses routes only when their
paths are available.
The static route is configured on Switch A, as shown in the CLI example following the figure.
FIGURE 4 Example of a static route
The following command configures a static route to 10.95.7.0, using 10.95.6.157 as the next-hop
gateway.
device(config)# ip route 10.95.7.0/24 10.95.6.157
When you configure a static IP route, you specify the destination address for the route and the next-
hop gateway or Layer 3 switch interface through which the Layer 3 switch can reach the route. The
Layer 3 switch adds the route to the IP route table. In this case, Switch A knows that 10.95.6.157 is
reachable through port 1/2, and also assumes that local interfaces within that subnet are on the same
port. Switch A deduces that IP interface 10.95.7.188 is also on port 1/2.
The software automatically removes a static IP route from the IP route table if the port used by that
route becomes unavailable. When the port becomes available again, the software automatically re-
adds the route to the IP route table.
Configuring a static IP route
To configure an IP static route with a destination address of 10.0.0.0 255.0.0.0 and a next-hop router
IP address of 10.1.1.1, enter a command such as the following.
device(config)# ip route 10.0.0.0 255.0.0.0 10.1.1.1
To configure a static IP route with an Ethernet port instead of a next-hop address, enter a command
such as the following.
device(config)# ip route 10.128.2.69 255.255.255.0 ethernet 4/1
The command in the previous example configures a static IP route for destination network
10.128.2.69/24. Since an Ethernet port is specified instead of a gateway IP address as the next hop,
the Layer 3 switch always forwards traffic for the 10.128.2.69/24 network to port 4/1. The command in
the following example configures an IP static route that uses virtual interface 3 as its next hop.
device(config)# ip route 10.128.2.71 255.255.255.0 ve 3
The command in the following example configures an IP static route that uses port 2/2 as its next hop.
device(config)# ip route 10.128.2.73 255.255.255.0 ethernet 2/2
Syntax: ip route dest-ip-addr dest-mask { next-hop-ip-addr | ethernet [ slotnum/]portnum | venum } [
metric ] [ distance num ]
or
Syntax: ip route dest-ip-addr/mask-bits { next-hop-ip-addr | ethernet [ slotnum/]portnum | venum } [
metric ] [ distance num ]
Configuring a static IP route
66 FastIron Ethernet Switch Layer 3 Routing Configuration Guide
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