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The ATM OAM Ping feature sends an ATM Operation, Administration, and Maintenance (OAM) packet to confirm the connectivity of a specific permanent virtual circuit (PVC). The status of the PVC is displayed when a response to the OAM packet is received. The ATM OAM Ping feature allows the network administrator to verify PVC integrity and facilitates ATM network troubleshooting.
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
A PVC corresponding to the virtual path identifier (VPI) and virtual channel identifier (VCI) values entered with the ping command should already exist.
The ATM OAM Ping feature does not support pings based on the following criteria:
The ATM OAM Ping feature modifies the pingcommand, which can be used to send an OAM packet to verify PVC connectivity. The status of the PVC is displayed when a response to the OAM packet is received. This is a common method for testing the accessibility of devices.
The ping atm interface atm command provides two ATM OAM ping options:
The ping atm interface atm command is used to determine the following:
The simpler ping command provides an interactive mode for testing ATM network connectivity. The ping command first sends an OAM command loopback cell to the destination and then waits for an OAM response loopback cell. The ping is successful only when the following criteria are met:
Perform this task to test the network connectivity by using the ping atm interface atm command in normal mode; that is, by entering all values for the ping test on the command line.
Perform this task to test network connectivity by using the ping command; that is, by providing values for the ping test by typing the value after the prompts displayed and pressing the Enter key. Press the Enter key without supplying a value to use the default.
To terminate a ping session, type the escape sequence--by default, Ctrl-Shift-6.
The following example verifies the connectivity of a specific PVC by sending an ATM OAM packet and confirms the connectivity when it is successful:
Router# show atm pvc 10/100
ATM1/1/0.100: VCD: 3, VPI: 10, VCI: 100
UBR, PeakRate: 100000 (235850 cps)
AAL5-LLC/SNAP, etype:0x0, Flags: 0x40, VCmode: 0x0, Encapsize: 12
OAM frequency: 0 second(s), OAM retry frequency: 1 second(s)
OAM up retry count: 3, OAM down retry count: 5
OAM Loopback status: OAM Disabled
Last cell looped No
Loop detect state 0, Last cell looped 0, OAM Retries 0, Loop Retries 0
OAM VC Status: Not Managed
ILMI VC status: Not Managed
InARP frequency: 15 minutes(s)
Transmit priority 3
InPkts: 78310, OutPkts: 78310, InBytes: 218651435, OutBytes: 218651435
InPRoc: 0, OutPRoc: 16, Broadcasts: 15
InFast: 0, OutFast: 0, InAS: 78310, OutAS: 78281
InPktDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0
Out CLP=1 Pkts: 0
OAM cells received: 315
F5 InEndloop: 310, F5 InSegloop: 5, F5 InAIS: 0, F5 InRDI: 0
OAM cells sent: 315
F5 OutEndloop: 310, F5 OutSegloop: 5, F5 OutAIS: 0, F5 OutRDI: 0
OAM cell drops: 0
Status: UP
VC 10/100 doesn't exist on 2 of 3 ATM interface(s)
Router#
The following example shows sample output for the ping atm interface atmcommand in normal mode:
Router# ping atm interface atm1/1/0.1 500 Type escape sequence to abort. Sending 5, 53-byte end-to-end OAM echoes, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 4/16/52 ms Router# ping atm interface atm1/1/0.1 0 500 seg-loopback Type escape sequence to abort. Sending 5, 53-byte segment OAM echoes, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms Router# ping atm interface atm1/1/0.1 0 500 end-loopback 100 25 Type escape sequence to abort. Sending 100, 53-byte end-to-end OAM echoes, timeout is 25 seconds: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! Success rate is 100 percent (100/100), round-trip min/avg/max = 4/13/180 ms Router# ping atm interface atm1/1/0.1 0 500 seg-loopback 50 20 Type escape sequence to abort. Sending 50, 53-byte segment OAM echoes, timeout is 20 seconds: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Success rate is 100 percent (50/50), round-trip min/avg/max = 1/1/4 ms Router# show atm pvc 10/100 ATM1/1/0.100: VCD: 3, VPI: 10, VCI: 100 UBR, PeakRate: 100000 (235850 cps) AAL5-LLC/SNAP, etype:0x0, Flags: 0x40, VCmode: 0x0, Encapsize: 12 OAM frequency: 10 second(s), OAM retry frequency: 1 second(s) OAM up retry count: 3, OAM down retry count: 5 OAM Loopback status: OAM Received Last cell looped No Loop detect state 0, Last cell looped 0, OAM Retries 0, Loop Retries 0 OAM VC Status: Verified ILMI VC status: Not Managed VC is managed by OAM. InARP frequency: 15 minutes(s) Transmit priority 3 InPkts: 78310, OutPkts: 78310, InBytes: 218651435, OutBytes: 218651435 InPRoc: 0, OutPRoc: 16, Broadcasts: 15 InFast: 0, OutFast: 0, InAS: 78310, OutAS: 78281 InPktDrops: 0, OutPktDrops: 0 CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0 Out CLP=1 Pkts: 0 OAM cells received: 331 F5 InEndloop: 326, F5 InSegloop: 5, F5 InAIS: 0, F5 InRDI: 0 OAM cells sent: 331 F5 OutEndloop: 326, F5 OutSegloop: 5, F5 OutAIS: 0, F5 OutRDI: 0 OAM cell drops: 0 Status: UP VC 10/100 doesn't exist on 2 of 3 ATM interface(s) Router#
The following is sample output for the pingcommand in the interactive mode:
router# ping
Protocol [ip]: atm
ATM Interface: atm1/1/0.100
VPI value [0]: 10
VCI value [1]: 100
Loopback - End(0), Segment(1) [0]:
Repeat Count [5]:
Timeout [2]:
Type escape sequence to abort.
Sending 5, 53-byte end-to-end OAM echoes, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
Router#
Related Topic |
Document Title |
---|---|
Cisco IOS commands |
|
ATM commands |
Cisco IOS Asynchronous Transfer Mode Command Reference |
ATM Overview |
|
Configuring ATM OAM traffic reduction |
"ATM OAM Traffic Reduction" |
Detecting failures when using OAM cells and PVC management |
"Troubleshooting PVC Failures When Using OAM Cells and PVC Management" |
Standard |
Title |
---|---|
ITU-T Specification I.610 (ITU-T specification for B-ISDN operation and maintenance principles and functions). |
I.610 Series I: Integrated Services Digital Network Maintenance principles |
MIB |
MIBs Link |
---|---|
None |
To locate and download MIBs for selected platforms, Cisco IOS XE software releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFC |
Title |
---|---|
None |
-- |
Description |
Link |
---|---|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1 | Feature Information for ATM OAM Ping |
Feature Name |
Releases |
Feature Information |
---|---|---|
ATM OAM Ping |
Cisco IOS XE Release 2.3 |
The ATM OAM Ping feature sends an ATM OAM packet to confirm the connectivity of a specific PVC. The status of the PVC is displayed when a response to the OAM packet is received. The ATM OAM Ping feature allows the network administrator to verify PVC integrity and facilitates ATM network troubleshooting. The following command was introduced or modified: ping atm interface atm. |
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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.