Cisco Router 800 Series Software Configuration Guide
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9-9 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 9 Troubleshooting ATM Troubleshooting Commands show atm interface Command To display ATM-specific information about an ATM interface, use the show atm interface atm0 privileged EXEC command. Following is the command syntax: show atm interface atm0 The following is an example of output from the show interface atm command: tw_820#sh atm int atm 0 Interface ATM0: AAL enabled: AAL5 , Maximum VCs:11, Current VCCs:0 Maximum Transmit...
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Chapter 9 Troubleshooting ATM Troubleshooting Commands 9-10 Cisco 800 Series Software Configuration Guide 78-5372-06 Avail bw = 640 Config. is ACTIVE Ta b l e 9 - 3 describes the fields shown in the command output. debug atm Commands This section describes how to use the debug atm commands with additional keywords to troubleshoot the router. Before Using Debug Commands You can use the debug commands to troubleshoot configuration problems that you might be having on your network. Debug commands...
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9-11 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 9 Troubleshooting ATM Troubleshooting Commands CautionDebugging is assigned a high priority in your router CPU process, and it can render your router unusable. For this reason, use debug commands only to troubleshoot specific problems. The best time to use debug commands is during periods of low network traffic so that other activity on the network is not adversely affected. debug atm errors Command Use the debug atm errors...
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Chapter 9 Troubleshooting ATM Troubleshooting Commands 9-12 Cisco 800 Series Software Configuration Guide 78-5372-06 debug atm events Command Use the debug atm events command to display ATM events. The no form of this command disables debugging output. Following is the command syntax: debug atm events no debug atm events This command displays ATM events that occur on the ATM interface processor and is useful for diagnosing problems in an ATM network. It provides an overall picture of the...
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9-13 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 9 Troubleshooting ATM Troubleshooting Commands 00:02:57: DSL: Sent command 0x5 00:02:57: DSL: Received response: 0x26 00:02:57: DSL: Unexpected response 0x26 00:02:57: DSL: Send ADSL_OPEN command. 00:02:57: DSL: Using subfunction 0xA 00:02:57: DSL: Using subfunction 0xA 00:02:57: DSL: Sent command 0x5 00:03:00: DSL: 1: Modem state = 0x8 00:03:00: DSL: 1: Modem state = 0x8 00:03:00: DSL: 1: Modem state = 0x8 00:03:00: DSL: 1:...
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Chapter 9 Troubleshooting ATM Troubleshooting Commands 9-14 Cisco 800 Series Software Configuration Guide 78-5372-06 Below is sample debug atm packet output. Router# 01:23:48:ATM0(O): VCD:0x1 VPI:0x1 VCI:0x64 DM:0x0 SAP:AAAA CTL:03 OUI:000000 TYPE:0800 Length:0x70 01:23:48:4500 0064 0008 0000 FF01 9F80 0E00 0010 0E00 0001 0800 A103 0AF3 17F7 0000 01:23:48:0000 004C BA10 ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD 01:23:48:ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD ABCD...
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9-15 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 9 Troubleshooting Troubleshooting Telephone Interfaces Troubleshooting Telephone Interfaces Ta b l e 9 - 6 describes possible problems that your router might be experiencing and solutions for solving the problems. Ta b l e 9 - 7 describes the applicable debug commands. Table 9-6 Symptoms of Telephone Interfaces Trouble Symptom Possible Problem Solution Even though you have devices connected to ports 1 and 2, all calls are...
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Chapter 9 Troubleshooting Troubleshooting Serial Line Problems 9-16 Cisco 800 Series Software Configuration Guide 78-5372-06 Troubleshooting Serial Line Problems This section describes how to troubleshoot problems in the following areas: Synchronous channel service unit/data service unit (CSU/DSU) clocking Synchronous leased lines Asynchronous dial-up lines Frame Relay X.25 Synchronous CSU/DSU Clocking Problems Clocking conflicts in serial connections can lead to either chronic loss of...
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9-17 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 9 Troubleshooting Troubleshooting Serial Line Problems Detecting Problems Use the following steps to detect clocking conflicts on your serial interface: Step 1Enter the show interfaces serial 0 privileged EXEC command on the routers at both ends of the link. Step 2Examine the output for cyclic redundancy check (CRC) or framing errors and aborts. If the number of CRC or framing errors exceeds an approximate range of 0.5 to 2.0...
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Chapter 9 Troubleshooting Troubleshooting Serial Line Problems 9-18 Cisco 800 Series Software Configuration Guide 78-5372-06 Ta b l e 9 - 8 describes possible CSU/DSU clocking problems your router might be experiencing and the solutions for solving those problems. Table 9-8 Synchronous CSU/DSU Clocking Problems Symptom Solution Incorrect CSU configuration Perform the following tasks in the following order: Determine whether the CSUs at both ends of the serial line agree on the clock source...