R0106-HP MSR Router Series Interface Command Reference(V7)

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Use undo timer-hold to restore the default.
Syntax
timer-hold seconds
undo timer-hold
Default
The keepalive interval is 10 seconds.
Views
AM interface view
E1-F/T1-F interface view
FCM interface view
ISDN BRI interface view
Serial interface view
Predefined user roles
network-admin
Parameters
seconds: Specifies the interval at which an interface sends keepalive packets, in the range of 0 to 32767
seconds.
Usage guidelines
On an interface encapsulated with PPP or HDLC, the data link layer sends keepalive packets at keepalive
intervals to detect the availability of the remote end. The data link layer considers the peer end as having
failed if it does not receive any keepalive messages within a specific number of keepalive intervals. The
data link layer then reports the link down event to the upper layer protocols.
On a slow link, increase the keepalive interval to prevent false shutdown of the interface. This situation
might occur when keepalive packets are delayed because a large packet is being transmitted on the link.
Examples
# Set the keepalive interval to 15 seconds for Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] timer-hold 15
Serial interface commands
async-mode
Use async-mode to set the operating mode of an asynchronous serial interface.
Use undo async-mode to restore the default.
Syntax
async-mode { flow | protocol }
undo async-mode