Static Route Tagging - Dell PowerConnect B-RX Configuration Manual

Dropping traffic sent to the null0 interface in hardware
Traffic sent to the null0 interface is done in hardware; that is, by programming the CAM to discard
traffic sent to the null0 interface. This improves forwarding efficiency and reduces the burden on
the device's CPU.
Hardware dropping for IP traffic sent to the null0 interface is supported.
You can optionally configure the device to drop traffic sent to the default IP route address in
hardware. To do this, enter the following commands.
BigIron RX(config)# ip route 0.0.0.0 0.0.0.0 null0
BigIron RX(config)# ip hw-drop-on-def-route
Syntax: [no] ip hw-drop-on-def-route
Configuring the device to drop traffic sent to the default IP route address in hardware causes the
device to program 32-bit host CAM entries for each destination address using the default route,
which could consume the CAM space. To prevent this from happening, you can enable the CAM
Default Route Aggregation feature. To do this, enter the following command:
BigIron RX(config)# ip dr-aggregate
Syntax: ip dr-aggregate

Static route tagging

Static routes can be configured with a tag value, which can be used to color routes and filter routes
during a redistribution process. When tagged static routes are redistributed to OSPF or to a protocol
that can carry tag information, they are redistributed with their tag values.
To add a tag value to a static route, enter commands such as the following:
BigIron RX(config)#ip route 192.122.12.1 255.255.255.0 192.122.1.1 tag 20
Syntax: ip route <dest-ip-addr> <dest-mask> | <dest-ip-addr>/<dest-mask>
The <dest-ip-addr> is the route's destination. The <dest-mask> is the network mask for the route's
destination IP address. Alternatively, you can specify the network mask information by entering a
forward slash followed by the number of bits in the network mask. For example, you can enter
192.0.0.0 255.255.255.0 as 192.0.0.0/.24. You can enter multiple static routes for the same
destination for load balancing or redundancy.
The <next-hop-ip-address> is the IP address of the next-hop router (gateway) for the route. In
addition, the <next-hop-ip-address> can also be a virtual routing interface (for example. ve 100), or
a physical port (for example, ethernet 1/1) that is connected to the next hop router.
Enter 0 – 4294967295 for tag <value>. The default is 0, meaning no tag.
Configuring load balancing and redundancy using multiple static
routes to the same destination
You can configure multiple static IP routes to the same destination, for the following benefits:
BigIron RX Series Configuration Guide
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<next-hop-ip-address> tag <value>
Configuring forwarding parameters
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