3com 3031 Instruccion De Instalación
Link Fragmentation and Interleaving on PPP
981
requires that end to end delay should not exceed 100 to 150ms. Link Fragment
and Interleave (LFI) divides the large data frame into small frames and then
transmits them to the front of the transmission queue and inserts the small
packets that are sensitive to delay between the fragments. In this way, the delay of
small real-time packet is reduced and fragments can be reassembled at the
destination.
and Interleave (LFI) divides the large data frame into small frames and then
transmits them to the front of the transmission queue and inserts the small
packets that are sensitive to delay between the fragments. In this way, the delay of
small real-time packet is reduced and fragments can be reassembled at the
destination.
The link fragment and interleave configuration includes:
■
Enable LFI
■
Configure maximum time delay of LFI fragment
■
Configure the bandwidth of the local interface on the interface
E
nabling LFI
Perform the following in the Virtual Template Interface View or the mp-group
Interface View.
Interface View.
LFI is not enabled by default.
Configuring Maximum
Time Delay of LFI
Fragment
The following command can be used to set the maximum time delay for
transmitting an LFI fragment.
transmitting an LFI fragment.
Perform the following in the Virtual Template Interface View or the mp-group
Interface View.
Interface View.
The default fragment delay is 10ms after LFI is enabled.
Configuring Bandwidth
of the Interface
This command can configure the physical bandwidth binding to the MP links. The
command indicates the available bandwidth of the active interface, providing the
information of the QoS module but not the actual bandwidth binding the MP
links.
command indicates the available bandwidth of the active interface, providing the
information of the QoS module but not the actual bandwidth binding the MP
links.
Perform the following in the Interface View.
The parameter
Kilobits
indicates the available bandwidth of the interface. It is in
Kbps and in the range of 1 to 1000000.
Table 1066 Enabling LFI
Operation
Command
Enable LFI on Virtual Template interface
ppp mp lfi
Disable LFI on Virtual Template interface
undo ppp mp lfi
Table 1067 Configuring maximum time delay of LFI fragment
Operation
Command
Configure maximum time delay of LFI fragment
ppp mp lfi delay-per-frag time
Restore the default maximum time delay of LFI
fragment
fragment
undo ppp mp lfi delay-per-frag
Table 1068 Configuring bandwidth of the interface
Operation
Command
Configure the bandwidth of the interface
qos max-bandwidth kilobits
Restore the default bandwidth
undo qos max-bandwidth