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By default, OAM F5 Loopback cell transmission is disabled, but if an OAM F5 Loopback cell is received,
it should be responded.
Examples
# Enable OAM F5 Loopback detection on PVC 1/32 and set the transmission interval of OAM F5
loopback cells to 12 seconds, set the retransmission detection up-count to 4, down-count to 4, and
retransmission period to 1 second.
<Sysname> system-view
[Sysname] interface Atm 3/1/1
[Sysname-Atm3/1/1] pvc 1/32
[Sysname-atm-pvc-Atm3/1/1-1/32] oam frequency 12 up 4 down 4 retry-frequency 1
oamping interface
Syntax
oamping interface atm { interface-number | interface-number.subnumber } pvc { pvc-name | vpi/vci }
[ number timeout ]
View
ATM interface view
Default level
2: Monitor level
Parameters
interface-number: Number of an ATM main interface.
interface-number.subnumber: Number of an ATM subinterface, in the range of 0 to 1023.
interface-number is the number of the ATM main interface of the subinterface.
pvc-name: PVC name, a unique case-insensitive string of 1 to 16 characters on ATM interface. The name
cannot be the same as any valid VPI/VCI pair. For example, the name 1/20 is not allowed.
vpi/vci: VPI/VCI pair. VPI is short for virtual path identifier; its value ranges from 0 to 255. VCI is short
for virtual channel identifier; its value ranges from 0 to 1023. As VCIs from 0 to 31 are reserved for
special purposes, do not use them in normal cases.
number: Number of OAM cells to be transmitted consecutively, in the range of 1 to 1000. The default is
5.
timeout: OAM response timeout period in seconds, in the range of 1 to 30. The default is 2.
Description
Use the oamping interface command to send OAM cells over the specified PVC on the current ATM
interface so as to check the link state. If no response is received within the specified time, this means that
the link is disconnected or so busy that packets are lost.
Examples
# Check the link state of PVC 1/32 on interface ATM 3/1/1 by sending three cells. Set the response
timeout period to one second.
<Sysname> system-view
[Sysname] interface Atm 3/1/1
[Sysname-Atm3/1/1] oamping interface Atm 3/1/1 pvc 1/32 3 1
Ping interface Atm3/1/1,pvc 1/32, with 3 of 53 bytes of ATM OAM F5 end-to-end
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