R2511-HP MSR Router Series Layer 2 - WAN Command Reference(V5)

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Interface type Value range
Virtual-Ethernet 46-1500
Usage guidelines
The MTU only influences the packet assembly and disassembly at the IP layer at the ATM interface. Due
to the limit of QoS queue length, MTU that is too small might cause numerous fragments. Thus, it might
be dropped by the QoS queue. The length of the QoS queue can be increased appropriately. The default
queue dispatching mechanism used by PVC is FIFO. You can use the qos fifo queue-length command in
the PVC view to change its queue length.
This command applies to ATM main interface and subinterface simultaneously.
Examples
# Set the MTU to 1492 bytes for interface ATM 1/0.
<Sysname> system-view
[Sysname] interface atm 1/0
[Sysname-Atm1/0] mtu 1492
oam ais-rdi
Use oam ais-rdi to set the parameters related to AIS/RDI alarm cell detection.
Use undo oam ais-rdi to restore the default.
Syntax
oam ais-rdi up up-seconds down down-count
undo oam ais-rdi
Default
A PVC goes down when an AIS/RDI alarm cell is received and goes up if no AIS/RDI alarm cells are
received in the last three seconds.
Views
PVC view, ATM class view
Default command level
2: System level
Parameters
up up-seconds: Specifies that the PVC goes up if no AIS/RDI alarm cells are received in a period
specified by the up-seconds argument (in seconds). The value range for the up-seconds argument is 3 to
60, and the default is 3.
down down-count: Specifies that the PVC goes down when the number of successive AIS/RDI alarm cells
received reaches the value specified by the down-count argument. The value range for the down-count
argument is 1 to 60, and the default is 1.
Usage guidelines
The oam ais-rdi command is not applicable to the secondary PVCs of a PVC group.
The primary PVC of a PVC group is the PVC based on which the PVC group is created.
Second PVCs are created in PVC groups.