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Using RouteOptions

The RouteOptions attribute is useful only when the default gateway is your own host.

For example, if the default gateway and lan0 are both set to 11.236.99.248, the output of the netstat -rn command from the routing table resembles:

    Destination     Gateway         Flags  Refs  Interface  Pmtu

    127.0.0.1       127.0.0.1       UH     0     lo0        4136

    11.236.99.248   11.236.99.248   UH     0     lan0       4136

    11.236.98.0     11.236.99.248   U      2     lan0       1500

    127.0.0.0       127.0.0.1       U      0     lo0           0

    default         11.236.99.248   UG     0     lan0          0

If the RouteOptions attribute is not set and lan0 fails, the MultiNICA agent migrates the base IP address to another NIC (such as lan1). The default route is no longer configured because it was associated with lan0. The display from the routing table resembles:

    Destination     Gateway         Flags  Refs  Interface  Pmtu

    127.0.0.1       127.0.0.1       UH     0     lo0        4136

    11.236.99.161   11.236.99.161   UH     0     lan2       4136

    11.236.98.0     11.236.99.161   U      2     lan2       1500

If the RouteOptions attribute defines the default route, the default route is reconfigured on the system. For example:

    RouteOptions@sysa = "default 11.236.99.248 0"

    RouteOptions@sysb = "default 11.236.99.249 0"