Brocade BigIron RX Series Configuration Guide - Manual (Page 910)

832 BigIron RX Series Configuration Guide
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BGP Null0 routing
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Configuration examples
Router 6
The following configuration defines specific prefixes to filter.
BigIron RX(config)#ip route 110.0.0.40/29 ethernet 3/7 tag 50
BigIron RX(config)#ip route 115.0.0.192/27 ethernet 3/7 tag 50
BigIron RX(config)#ip route 120.0.14.0/23 ethernet 3/7 tag 50
The following configuration redistributes routes into BGP.
BigIron RX(config)#router bgp
BigIron RX(config-bgp-router)#local-as 100
BigIron RX(config-bgp-router)#neighbor 192.168.5.4 remote-as 100
BigIron RX(config-bgp-router)#neighbor 193.168.5.4 remote-as 100
BigIron RX(config-bgp-router)#neighbor 194.168.5.4 remote-as 100
BigIron RX(config-bgp-router)#neighbor 195.168.5.4 remote-as 100
BigIron RX(config-bgp-router)#neighbor 196.168.5.4 remote-as 100
BigIron RX(config-bgp-router)#neighbor 197.168.5.4 remote-as 100
BigIron RX(config-bgp-router)#redistribute static route-map blockuser
BigIron RX(config-bgp-router)#exit
The following configuration defines the specific next hop address and sets the local preference to
preferred.
BigIron RX(config)#route-map blockuser permit 10
BigIron RX(config-routemap blockuser)#match tag 50
BigIron RX(config-routemap blockuser)#set ip next-hop 199.199.1.1
BigIron RX(config-routemap blockuser)#set local-preference 1000000
BigIron RX(config-routemap blockuser)#set origin igp
BigIron RX(config-routemap blockuser)#exit
Router 1
The following configuration defines the 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
local-as 100
BigIron RX(config-bgp-router)#neighbor
<
router2_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
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