Oam-pvc – Enterasys Networks X-Pedition XSR CLI User Manual
Page 521
Other ADSL Commands
XSR CLI Reference Guide 13-95
oam-pvc
This command enables end‐to‐end F5 (circuit) OAM cell procedures for ATM Permanent Virtual
Circuit (PVC) management. OAM cells and how they are used are as follows:
•
Alarm Indication Signal (AIS) – Received from the network to indicate a problem in the
forward‐to‐XSR data flow.
•
Continuity Check (CC) – Echoed to the sender when received. The XSR does not generate CC
cells for connectivity management but will respond to CC procedure negotiation cells.
•
Loopback – Echoed back to the sender when received. The XSR sends loopback cells to monitor
the end‐to‐end connectivity on the VC.
•
Remote Defect Indication (RDI) – Received from the network to indicate a problem in the
reverse‐from‐XSR data flow. Sent to the network to indicate a problem in the local node XSR
as well as in response to any AIS cells received.
The loopback cells monitor and declare the circuit up or down as follows:
•
The circuit is UP immediately after line training completes successfully.
•
The circuit is declared DOWN when down‐count consecutive loopback response cells are
missed.
•
The circuit is declared UP when up‐count consecutive loopback response cells are received.
This command requires a properly configured ATM sub‐interface.
Syntax
oam-pvc [manage][frequency]
Syntax of the “no” Form
The no form of this command disables all OAM procedures for this sub‐interface:
no oam-pvc
Mode
ATM Sub‐Interface configuration:
XSR(config-if
Defaults
•
OAM procedures: Disabled
•
Interval between loopback cells (frequency): 10 seconds
•
Initial down‐count value: 5
•
Initial up‐count value: 3
manage
Optional keyword.
frequency
Interval between sending end‐to‐end F5 OAM loopback cells when the
VC is in the UP state. Range: 1 to 3600 seconds.