R2511-HP MSR Router Series Interface Configuration Guide(V5)

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Step Command Remarks
1. Enter system view.
system-view N/A
2. Specify PPP or Ethernet
encapsulation on the 3G/4G
modem module.
card-mode slot slot-num { ppp |
ethernet }
N/A
3. Enter interface view.
• Enter cellular interface view:
interface cellular
interface-number
• Enter cellular Ethernet interface
view:
interface cellular-ethernet
interface-number
Use the interface cellular command
if PPP encapsulation is specified.
Use the interface cellular-ethernet
command if Ethernet encapsulation
is specified.
4. Enable 3G/4G modem
auto-reset.
modem auto-recovery enable Disabled by default.
5. Set the interval of waiting for
the response from the 3G/4G
modem after the system sends
an AT command and the
maximum times that the
3G/4G modem does not
respond.
modem response timer time
auto-recovery threshold
Optional.
By default, the response interval is
10 seconds and auto-recovery
threshold is 3.
Associating a cellular interface with a track entry and
configuring auto-recovery parameters of 3G/4G modem
You can associate a cellular interface with the detection module through the track module. For example,
the detection module uses NQA ICMP echo requests for tests and notifies the cellular interface of a
negative event through the track module if the destination host is unreachable. When NQA detects link
recovery, it notifies the cellular interface of a positive event through the track module.
With this function, the system determines whether a cellular interface has received a positive event after
the interface receives a negative event.
• If yes, the 3G/4G modem automatically recovers. If the interface receives no positive event within
the specified delay time, the 3G/4G modem recovers repeatedly.
• If not, it indicates that the 3G/4G modem fails possibly because of configuration errors. In this case,
the system performs no action.
To associate a cellular interface with a track entry and configure auto-recovery parameters of a 3G/4G
modem:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Specify PPP or Ethernet
encapsulation on the 3G/4G
modem module.
card-mode slot slot-num { ppp |
ethernet }
N/A