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Troubleshooting
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Summary of Contents for FS D710 Series
- Page 1 18M2C2 TROUBLESHOOTING GUIDE 18M2C2 Troubleshooting Guide Models: D710 Series...
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Page 2: Table Of Contents
3.3. Interface Frequent Up/Down....................... 14 4. Management Packet IP Forwarding and Routing Fault Handling........16 4.1. PING Failure............................16 4.2. Traceroute Failure..........................18 4.3. Inability to Learn Peer ARP Entries................19 5. Appendix ........................... 23 5.1. Terminology......................... 23 5.2. Abbreviations ......................24 www.fs.co... -
Page 3: Troubleshooting Overview
Problem tracking when failures occur; ● Relevant output information when a fault occurs; ● Relevant alarm information when a fault occurs; ● Relevant log information when the fault occurs; ● Actions taken after a failure occurs; ● Equipment networking status; ● www.fs.com... -
Page 4: Fault Diagnosis
Troubleshooting refers to the process of using the correct troubleshooting methods to eliminate the fault and restore the normal operation of the system after correctly locating the fault, such as repairing lines, replacing, modifying configurations, switching systems, resetting the entire machine, etc. www.fs.com... -
Page 5: Fault Summary
The document is a summary of valuable troubleshooting experience and an important reference for future ● troubleshooting. The document records all operations and configuration changes during the troubleshooting process, which is also ● the basis for troubleshooting next time. 1.3. Troubleshooting Approaches Figure 3-1 shows the troubleshooting process. Figure 3-1 Troubleshooting Approaches www.fs.com... -
Page 6: Signal Flow Analysis
The communication between the equipment network management computer and the equipment is completely dependent on ● normal communication. Once the communication between the network management computer and the equipment fails, the ability to obtain fault information through this channel will be greatly reduced, or even completely lost. www.fs.com... -
Page 7: Indicator Light Analysis
Therefore, this method can only be used as an emergency measure and should be used with caution when it is absolutely necessary. www.fs.com... -
Page 8: Replacement
The potential causes for Telnet login issues include: Routing issues that prevent the establishment of a TCP connection. ● The number of users logged into the device has reached its maximum limit. ● Incorrect username or password configuration. ● Fault Diagnosis Process Omitted www.fs.com... - Page 9 5 } The password command creates or modifies the username and password of a login user. Step 4: Check whether the user name and password are set correctly. If the above steps cannot solve the problem, please collect the following information and contact FS for technical support.
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Page 10: Ssh Login Failure
Log into the device via the console interface and use the command `show sshd` to check the SSH server configuration information. fscom#show sshd SSH protocol version: 2.0 sshd running status: running sshd current connection number: 0 hostkey RSA status: loaded hostkey DSA status: unloaded www.fs.com... - Page 11 Log in to the device via the console and execute the `show sshd connection` command to check if all SSH channels are occupied. fscom# show sshd connection ssh connection information ssh-conn1 status: disconnect ssh-conn2 status: disconnect ssh-conn3 status: disconnect ssh-conn4 status: disconnect ssh-conn5 status: disconnect www.fs.com...
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Page 12: Interface Los
18M2C2 TROUBLESHOOTING GUIDE Step 7: Check whether the user name and password are set correctly. If the above steps cannot solve the problem, please collect the following information and contact FS for technical support. The results of executing the above steps. - Page 13 When using physical loopback, you can see that the both ends of the link fiber. modules at both ends. interface indicator is off and there is no LoS alarm. www.fs.com...
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Page 14: Interface Physical Layer Down
Step 3 Check whether the hardware of the local and peer devices is faulty. Try connecting the cable to another interface, and if the issue persists, proceed to step 5 Step 4 If the above steps cannot solve the problem, please collect the following information and contact FS for technical support. - Page 15 If the fault persists after replacing whether there is any fault at the cable, try replacing the optical When a physical loopback is used, you can see that the both ends of the link fiber modules at both ends. interface is Up. www.fs.com...
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Page 16: Interface Frequent Up/Down
Step 3 Check whether the hardware of the local and peer devices is faulty. Try connecting the cable to another interface, and if the issue persists, proceed to step 5 Step 4 If the above steps cannot solve the problem, please collect the following information and contact FS for technical support. - Page 17 If the fault persists after replacing whether there is any fault at the cable, try replacing the optical When a physical loopback is used, you can see that the both ends of the link fiber. modules at both ends. interface is Up. www.fs.com...
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Page 18: Management Packet Ip Forwarding And Routing Fault Handling
Step 3 Check whether the hardware of the local and remote devices is faulty. Try connecting the cable to another port. If the fault persists, proceed to step 4. Step 4 If the above steps cannot solve the problem, please collect the following information and contact FS for technical support The results of executing the above steps. - Page 19 Internet address: 172.16.125.121 Netmask: 255.255.255.0 Inet6: FE80::20E:5EFF:FE00:AA prefixLen 64 Ethernet address: 00:0e:5e:00:00:aa Duplex:full-duplex Speed:100baseT Autonegotiation:enable If it is displayed as Down, refer to "5.2 Interface Physical Layer Down" for troubleshooting. ● If it is displayed as Up, proceed to step 2. ● www.fs.com...
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Page 20: Traceroute Failure
If the ARP or neighbor table entry for the peer IP address has been learned, proceed to Step 5. ● Step 5 If the above steps cannot solve the problem, please collect the following information and contact FS for technical support. -
Page 21: Inability To Learn Peer Arp Entries
For detailed steps, please refer to the positioning idea in "6.1 PING problem". Step 2: Check whether UDP message transmission is prohibited in the network. Step 3: If the above steps cannot solve the problem, please collect the following information and contact FS for technical support. - Page 22 Log in to the device and execute the show interface command in the Client interface mode to view the physical layer status of the interface. fscom# config fscom(config)# interface client 1 fscom(config-client/1)# show interface The current Port mapping lan10glan: link status : link up ALARM status: auto negotiation status enable : disable www.fs.com...
- Page 23 Step 2: Check whether the number of entries in the ARP mapping table has reached the maximum specification. Execute the command show arp in privileged mode to view the current number of ARP entries in the device, and check whether it reaches the specified number of entries for the device. www.fs.com...
- Page 24 If the PING is normal, please proceed to step 4. ● Step 4 If the above steps cannot solve the problem, please collect the following information and contact FS for technical support. The results of executing the above steps.
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Page 25: Appendix
Detect and analyze possible faults in the ring network . A device that uses external energy to maintain population Light Amplification by Stimulated Emission inversion, provides positive feedback in an optical resonant cavity, of Radiation and produces coherent light radiation through stimulated emission and amplification . www.fs.com... -
Page 26: Abbreviations
. The device log complies with the Syslog protocol format defined in Syslog RFC3164 . 5.2. Abbreviation Address Resolution Protocol Electro Static Discharge Internet Protocol www.fs.com... - Page 27 18M2C2 TROUBLESHOOTING GUIDE Relative Humidity RMON Remote Network Monitoring Secure Shell SSHv2 Secure Shell version 2 Transmission Control Protocol User Datagram Protocol VLAN Virtual Local Area Network www.fs.com...
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