Dell PowerConnect B-RX Configuration Manual page 827

Router 2
The following configuration defines a null0 route to the specific next hop address. The next hop
address 199.199.1.1 points to 128.178.1.101, which gets blocked.
BigIron RX(config)#ip route 199.199.1.1/32 null0
BigIron RX(config)#router bgp
BigIron RX(config-bgp-router)#local-as 100
BigIron RX(config-bgp-router)#neighbor <router1_int_ip address> remote-as 100
BigIron RX(config-bgp-router)#neighbor <router3_int_ip address> remote-as 100
BigIron RX(config-bgp-router)#neighbor <router4_int_ip address> remote-as 100
BigIron RX(config-bgp-router)#neighbor <router5_int_ip address> remote-as 100
BigIron RX(config-bgp-router)#neighbor <router6_int_ip address> remote-as 100
BigIron RX(config-bgp-router)#neighbor <router7_int_ip address> remote-as 100
After configuring the null0 application, you can display the configuration using the show ip route
static, show ip bgp route, and show ip route commands.
For example, when you issue the show ip route static command on Router 6, you see the following
output.
BigIron RX# show ip route static
Type Codes - B:BGP
1
2
3
BigIron RX#
Entering a show ip route static on Router 1 and Router 2 displays the following.
BigIron RX# show ip route static
Type Codes - B:BGP
1
BigIron RX#
BigIron RX Series Configuration Guide
53-1001810-01
D:Connected
Destination
110.0.0.40/29
115.0.0.192/27
120.0.14.0/23
D:Connected
Destination
192.168.0.1/32
S:Static R:RIP O:OSPF;
Gateway Port
DIRECT eth 3/7
DIRECT eth 3/7
DIRECT eth 3/7
S:Static R:RIP O:OSPF;
Gateway Port
DIRECT drop
26
BGP Null0 routing
Cost - Dist/Metric
Cost Type
1/1 S
1/1 S
1/1 S
Cost - Dist/Metric
Cost Type
1/1 S
755