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420 CHAPTER 25: HDLC CONFIGURATION COMMANDS
You should set the same polling interval on both the local and remote devices.
Setting it to zero disables link status check.
Example # Set the link status polling interval to 100 seconds on interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] timer hold 100