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JunosE 11.3.x IP, IPv6, and IGP Configuration Guide
interface fastEthernet
interface loopback
36
This command creates a static route and installs it in the routing table only if RTR 11
is currently reachable or if no other static route to IP destination address 10.1.1.2 is
usable.
host1(config)#ip route 10.1.1.2 255.255.255.255 10.1.1.2 fastEthernet 4/1 verify rtr 11
last-resort
When both RTR 10 and RTR 11 are unreachable, you can control which static route is
installed in the routing table by including the last-resort keyword in the ip route verify
rtr command only for the route that you want to install.
NOTE: For detailed information about the commands for configuring RTR
probes, see "Response Time Reporter" on page 62.
Use to select a Fast Ethernet (FE) interface on a line module or an SRP module.
Example
host1(config)#interface fastEthernet 1/0
Use the no version to remove IP from an interface or subinterface. You must issue the
no version from the highest level down; you cannot remove an interface or a subinterface
if the one above it still exists.
NOTE: For more details on use of this command, see the syntax description
in the JunosE Command Reference Guide.
See interface fastEthernet
Use to access and configure a loopback interface.
You can use a loopback interface to provide a stable IP address that can minimize the
impact if a physical interface goes down.
Example
host1(config)#interface loopback 10
host1(config-if)#ip address 100.20.32.1 255.255.255.255
You cannot shutdown a loopback interface.
BEST PRACTICE: We recommend that you configure a 32-bit subnet mask
for the loopback interface. For example, if you configure a loopback
interface with the IP address and mask as 1.1.1.1/16, the 1.1.0.0/16 route entry
is entered on the line module and all traffic destined to the to 1.1.0.0/16
subnet is forwarded to the SRP module by the line module. Although the
SRP module responds only to traffic destined to the 1.1.1.1 subnet and
Copyright © 2010, Juniper Networks, Inc.
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