18By 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 F5loopback cells to 12 seconds, set the retransmission detection up-count to 4, down-count to 4, andretransmission period to 1 second. 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 1oamping interfaceSyntaxoamping interface atm { interface-number | interface-number.subnumber } pvc { pvc-name | vpi/vci }[ number timeout ]ViewATM interface viewDefault level2: Monitor levelParametersinterface-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 namecannot 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 shortfor virtual channel identifier; its value ranges from 0 to 1023. As VCIs from 0 to 31 are reserved forspecial 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 is5.timeout: OAM response timeout period in seconds, in the range of 1 to 30. The default is 2.DescriptionUse the oamping interface command to send OAM cells over the specified PVC on the current ATMinterface so as to check the link state. If no response is received within the specified time, this means thatthe 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 responsetimeout period to one second. system-view[Sysname] interface Atm 3/1/1[Sysname-Atm3/1/1] oamping interface Atm 3/1/1 pvc 1/32 3 1Ping interface Atm3/1/1,pvc 1/32, with 3 of 53 bytes of ATM OAM F5 end-to-end
