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Multipoint Wireless Support for the Cisco uBR7200 Series Universal Broadband Router
Configuration Tasks
8
Cisco IOS Release 12.1(5)XM
If a second antenna is employed, its receive path must also be tested. Use the following commands to
configure the second antenna. Issue the show running-configuration command to see the IF
configuration.
Configuring RF Loopback (Optional)
An RF loopback confirms that the wiring to the transverter is correct, that communication has been
established from the line card to the transverter, and that the transverter is operating correctly. (It does not
test the duplexer, which is the final stage before the signal is sent to the antenna.) Also, loopback does not
test forward error corrections (FEC) and MAC-layer interface of the line card; other tests must be done for
these portions of the line card. Because there is only one transmit path, the path to each transverter must be
tested separately. Use the following commands to configure the RF loopback.
Step 8
Router(config-if)# no loopback
Removes the loopback commands used up to this
point.
Step 9
Router(config-if)# no shut
Establishes link.
Command Purpose
Command Purpose
Step 1
Router(config-if)# shut
Stops the interface.
Step 2
Router(config-if)# loopback local if diversity 2
Configures the IF to loop the lower half of the
channel for antenna 2.
Step 3
Router(config-if)# no shut
Brings up the loopback mode.
Step 4
Router(config-if)# shut
Stops the interface.
Step 5
Router(config-if)# loopback local if diversity 3
Configures the IF to loop the upper half of the
channel for antenna 2.
Step 6
Router(config-if)# no shut
Brings up the loopback mode.
Step 7
Router(config-if)# shut
Stops the interface.
Step 8
Router(config-if)# no loopback
Removes the loopback commands used up to this
point.
Step 9
Router(config-if)# no shut
Establishes link.
Command Purpose
Step 1
Router(config-if)# shut
Stops the interface.
Step 2
Router(config-if)# loopback local rf main 2
Configures the RF to loop the lower half of the
channel.
Step 3
Router(config-if)# no shut
Brings up the loopback mode.
Step 4
Router(config-if)# shut
Stops the interface.
Step 5
Router(config-if)# loopback local rf main 3
Configures the RF to loop the upper half of the
channel.
Step 6
Router(config-if)# no shut
Brings up the loopback mode.
Step 7
Router(config-if)# shut
Stops the interface.