R0106-HP MSR Router Series Layer 2 - WAN Command Reference(V7)

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Predefined user roles
network-admin
Parameters
size: Specifies the MP sort buffer size factor in the range of 1 to 64.
Usage guidelines
The MP sort buffer size = the number of channels in the current MP bundle × size. You can use the display
ppp mp command to view the number of member channels in an MP bundle. If the calculated MP sort
buffer size is 20, the MP sort buffer can sort 20 packets.
When MP is used, the received packets might be out of order. The sort buffer is used to re-sort packets.
A large sort buffer results in better re-sorting but increases delay. For voice packets, the transmission
delay should be minimized.
Examples
# Configure the MP sort buffer size factor as 64.
<Sysname> system-view
[Sysname] interface mp-group 1
[Sysname-MP-group1] ppp mp sort-buffer-size 64
ppp mp timer lost-fragment
Use ppp mp timer lost-fragment to configure the timer for MP to wait for the expected fragments.
Use undo ppp mp timer lost-fragment to restore the default.
Syntax
ppp mp timer lost-fragment seconds
undo ppp mp timer lost-fragment
Default
The timer for MP to wait for the expected fragments is 30 seconds.
Views
VT interface view, dialer interface view, MP-group interface view
Predefined user roles
network-admin
Parameters
seconds: Specifies the timer for MP to wait for the expected fragment, in the range of 1 to 255 seconds.
Usage guidelines
When the receiving end receives the first fragment of a packet, it starts the timer. When the timer expires,
the system checks whether or not all fragments have arrived:
• If they have all arrived, the system reassembles the fragments.
• If they have not all arrived, the system discards all received fragments to release the buffer space.
Examples
# Configure the timer for MP to wait for the expected fragment as 20 seconds.
<Sysname> system-view