Pengo Computer Accessories UBR7200 manual Configuring RF Loopback Optional

Multipoint Wireless Support for the Cisco uBR7200 Series Universal Broadband Router

Configuration Tasks

	Command	Purpose
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.

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-configurationcommand to see the IF configuration.

	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.

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.

	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.

Cisco IOS Release 12.1(5)XM

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