Backup Links
Configuring a Backup Link
Configuring a Backup Link
Configure the Monitoring Hub Only. All configuration of the backup links feature is performed from CiscoView or the ASCII console. On the “remote” device, you only need to make sure the ports used for the primary and backup links are both enabled.
Use the Backup Function. To configure this link, you use the Backup func- tion in the ASCII console. You provide the following information:
■the device and port to be used for the backup link
■the device and port to be used for the primary link
■the MAC address of the device at the remote end of the link
■how frequently (in seconds) test packets (used to check the status of the primary link) should be sent to the remote device
■how many consecutive response failures will trigger activation of the backup link
Configuration/Installation Sequence
If a hub is installed in a network that includes two connections to another hub, and the backup link has not yet been configured, a loop in the network now exists that will cause some network performance degradation. For this reason, it is better to configure the backup link on the hub before the hub is installed in the network. It is best to follow these steps:
1.Attach a PC running an ASCII terminal emulator to the hub and start the ASCII terminal emulator.
2.Use the Backup function to configure the backup link.
3.Complete the network cable connections between the monitoring hub and the remote device. For cabling instructions, see Appendix A, “Cables and Connectors,” in this manual.
4.On the remote device, make sure that the ports connected to both the primary and backup links are enabled. On the monitoring hub, the status of the primary and backup ports is controlled by the hub’s firmware; you do not need to explicitly enable the monitoring hub’s ports.
Backup Links
