Cisco MWR 1941-DC - 1941 Mobile Wireless Router, Software Configuration Manual

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Cisco MWR 1941-DC Mobile Wireless Edge Router Software Configuration Guide
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Chapter 4 Configuring the MWR 1941-DC in an IP-RAN
Configuring Fast Ethernet Interfaces
To configure HSRP support, do the following while still in interface configuration mode:
Step 1
Specify the name of the standby group.
Router(config-if)# standby group name group-name
Note
The standby group names must be “one” and “two.” For FE 0/0, the command must be
standby 1 name one . For FE 0/1, the command must be standby 2 name two .
Tips
If you omit the group-name or if you enter a group name that doesn’t begin with one or two, the
configuration will fail and there will be a mismatch in the information displayed by the show
redundancy and show standby commands.
Step 2
Enable HSRP and assign an IP address to the virtual router. This address is the same for both the active
and standby routers.
Router(config-if)# standby group ip address
Step 3
Configure the time between hello packets and the time before other routers declare the active Hot
Standby or standby router to be down.
Router(config-if)# standby group timers [ msec ] hellotime [ msec ] holdtime
Note
You must use 1 for the hello time and 3 for the hold time.
Step 4
Indicate that the router can become the active router when its priority is higher than all other
HSRP-configured routers. Without preemption, a standby router will only transition to the active state
if HSRP “hello messages” cease. In the CDMA IP-RAN solution, there may be situations in which you
want a switchover to occur in the absence of a router or FE failure, therefore, preemption is required.
Router(config-if)# standby group preempt
Step 5
Specify other interfaces on the router for the HSRP process to monitor in order to alter the HSRP
priority for a given group. When using the MWR 1941-DC router in the CDMA IP-RAN solution, you
must configure each FE interface to track the multilink interface, the loopback interfaces, and the
other
FE interface.
Router(config-if)# standby group track multilink number decrement_value
Router(config-if)# standby group track loopback number decrement_value
Router(config-if)# standby group track fastethernet number decrement_value
Note
In redundant configurations, you should issue standby track commands for both the health
interface (loopback101) and the revertive interface (loopback102) as well as for the backhaul
interface (multilink1). The decrement values
must be as follows: 10 for the multilink, FE,
and health interfaces; 5 for the revertive interface.