Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual page 59

Configure a loopback interface, and assign an IP address and mask to the
1.
interface.
host1(config)#interface loopback 0
host1(config-if)#ip address 10.1.1.1 255.255.255.255
host1(config-if)#exit
Configure Fast Ethernet port 4/0 with an unnumbered primary IP interface
2.
associated with the loopback interface configured in Step 1.
host1(config)#interface fastEthernet 4/0
host1(config-if)#ip unnumbered loopback 0
host1(config-if)#exit
Repeat Step 2 for Fast Ethernet port 4/1.
3.
host1(config)#interface fastEthernet 4/1
host1(config-if)#ip unnumbered loopback 0
host1(config-if)#exit
Define probe RTR 10 for Fast Ethernet interface 4/0.
4.
a. Assign an operation number to the RTR probe, and access RTR Configuration
mode. For information, see "Configuring the Probe Type" on page 66.
host1(config)#rtr 10
host1(config-rtr)#
b. Configure the RTR probe as an echo type, and set the IP destination address
and source interface.
You must configure the RTR probe as an echo type to use next-hop
verification. For information, see "Configuring the Probe Type" on page 66.
host1(config-rtr)#type echo protocol ipIcmpEcho 10.1.1.2
source fastEthernet 4/0
c. Specify the interface on which the RTR probe expects to receive responses.
You must set the receive-interface attribute when multiple RTR operations
use the same target address. For information, see "Setting the Receiving
Interface" on page 70.
host1(config-rtr)#receive-interface fastEthernet 4/0
d. (Optional) Configure optional probe characteristics, such as the frequency
and samples-of-history kept. For information, see "Configuring Optional
Characteristics" on page 67.
host1(config-rtr)#frequency 1
host1(config-rtr)#samples-of-history-kept 0
e. Exit RTR Configuration mode.
host1(config-rtr)#exit
Chapter 1: Configuring IP
35
IP Routing