Transmit-Interface Command

To assign a transmit interface to a receive-only interface, use the transmit-interface command in interface configuration mode

The following example specifies Ethernet interface 0 as a simplex Ethernet interface:

interface ethernet 1 

 ip address 128.9.1.2 

 transmit-interface ethernet 0

Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services, Release 12.3 - IP Addressing and Services Commands: T through W [Cisco IOS Software Releases 12.3 Mainline] - Cisco Systems