Company business needs, the original Unicom line to switch to the mobile line, originally very simple problem, as long as the original line router on the Unicom Port Unplugged, plug in the mobile line on the line.
The other side feedback plug on the router network port is not lit
After landing the other router discovers that the port mode is half duplex mode
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Log in to the other router
#config
# (config) #
(config) #interface giabitehernet0/0
(config-if) #duplex full
wr
Problem solving
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Resolving the problem of switching into mobile leased line in Unicom line