Scramble - H3C MSR 20-20 Command Reference Manual

158 C 7: POS I
HAPTER NTERFACE
Example
mtu
Syntax
View
Parameter
Description
Related command:
Example

scramble

Syntax
C C
ONFIGURATION OMMANDS
n
If you enable loopback on a POS interface encapsulated with PPP, it is normal
■
that the state of the link layer protocol is reported up.
Loopback and clock slave cannot be set at the same time; otherwise, POS
■
interfaces cannot be connected successfully.
# Enable internal loopback on interface POS 1/0.
<Sysname> system-view
[Sysname] interface pos 1/0
[Sysname-Pos1/0] loopback local
mtu size
undo mtu
POS interface view
size: Size (in bytes) of the maximum transmission unit (MTU). MTU range and the
default value vary with device.
Use the command to set the MTU size of the POS interface.
mtu
Use the
undo mtu
The MTU setting of the POS interface can affect the assembly and fragmentation
of IP packets on it.
In QoS, the length of queues is limited. If MTU on the interface is too small, there
is likelihood for a large packet to be fragmented into so many fragments that the
queue cannot hold them and as such discard them. To avoid this situation, you can
extend the queue length by using the qos fifo queue-length command in
interface view. The default queuing mechanism on the interface is FIFO. For more
information on how to configure queuing, refer to "FIFO Queuing Configuration
Commands" on page 1809.
display interface pos.
# Set MTU of POS interface 0/0/0 to 1492.
<Sysname> system-view
[Sysname] interface pos 1/0
[Sysname-Pos1/0] mtu 1492
scramble
undo scramble
command to restore the default.