User Guide
Page 193
...connected with IP protocol Faulty ethernet cable Faulty port Faulty module Incorrect initial configuration Replace the cable Replace the module Replace the module Erase the connection and reconfigure the port Be sure the switch has a valid IP address, subnet mask and default gateway configured Check that... that the power cord is properly connected to the switch, and to manage the device If you cannot connect using Console connection Be sure the terminal emulator program is not readable Software settings Replace the serial cable Reconfigure the emulation software connection settings....
...connected with IP protocol Faulty ethernet cable Faulty port Faulty module Incorrect initial configuration Replace the cable Replace the module Replace the module Erase the connection and reconfigure the port Be sure the switch has a valid IP address, subnet mask and default gateway configured Check that... that the power cord is properly connected to the switch, and to manage the device If you cannot connect using Console connection Be sure the terminal emulator program is not readable Software settings Replace the serial cable Reconfigure the emulation software connection settings....
User Guide
Page 194
... Table 12 Troubleshooting Solutions (continued) Problems Possible Cause Device is reversed Change if necessary. Check Rx and Tx on fiber optic cable Bad cable Replace with a tested cable Wrong cable type Verify that all 10 Mbps connections use a Cat 5 cable Lost Password Check the port LED or zoom...versa, split pair (incorrect twisting of pairs) Solution Download and install a working or previous software version from the console Check pinout and replace if necessary Fiber optical cable connection is in the NMS application, and change setting if necessary Contact...
... Table 12 Troubleshooting Solutions (continued) Problems Possible Cause Device is reversed Change if necessary. Check Rx and Tx on fiber optic cable Bad cable Replace with a tested cable Wrong cable type Verify that all 10 Mbps connections use a Cat 5 cable Lost Password Check the port LED or zoom...versa, split pair (incorrect twisting of pairs) Solution Download and install a working or previous software version from the console Check pinout and replace if necessary Fiber optical cable connection is in the NMS application, and change setting if necessary Contact...
User Guide
Page 210
...of transmission cost. It uses IP as the underlying transport mechanism to provide access to RIP. Secure Shell (SSH) A secure replacement for subnet routing, authentication, and multicast transmissions. RIP-2 is useful when TCP would be discarded before reaching their targets. A loop...as a rough estimate of traffic conditions, including specific error types. Trivial File Transfer A TCP/IP protocol commonly used for packet-switched communications. Protocol (TFTP) User Datagram Protocol (UDP) UDP provides a datagram mode for software downloads. connection-less datagrams that ...
...of transmission cost. It uses IP as the underlying transport mechanism to provide access to RIP. Secure Shell (SSH) A secure replacement for subnet routing, authentication, and multicast transmissions. RIP-2 is useful when TCP would be discarded before reaching their targets. A loop...as a rough estimate of traffic conditions, including specific error types. Trivial File Transfer A TCP/IP protocol commonly used for packet-switched communications. Protocol (TFTP) User Datagram Protocol (UDP) UDP provides a datagram mode for software downloads. connection-less datagrams that ...
User Guide
Page 212
... telephone technical support, software upgrades, onsite assistance, or advanced hardware replacement. This query-based interactive tool is located at : http://eSupport.3com.com/ 3Com eSupport services are based on 3Com Extended Warranty and Professional Services, see: http://www.3com.com/ G OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS 3Com offers product registration, case management, and repair services through eSupport...
... telephone technical support, software upgrades, onsite assistance, or advanced hardware replacement. This query-based interactive tool is located at : http://eSupport.3com.com/ 3Com eSupport services are based on 3Com Extended Warranty and Professional Services, see: http://www.3com.com/ G OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS 3Com offers product registration, case management, and repair services through eSupport...