Dell PowerConnect 6248 User's Guide - Page 602
Loopbacks, Loopbacks Configuration
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Loopbacks The PowerConnect 6200 Series provides for the creation, deletion, and management of loopback interfaces. They are dynamic interfaces that are created and deleted through user-configuration. The PowerConnect 6200 Series supports multiple loopback interfaces. A loopback interface is always expected to be up. As such, it provides a means to configure a stable IP address on the device that may be referred to by other switches. This interface provides the source address for sent packets and can receive both local and remote packets. It is typically used by routing protocols. The loopback does not behave like the network port on Switching systems. In particular, there are no neighbors on a loopback interface. It is a pseudo-device for assigning local addresses so that the router can be communicated with by this address, which is always up and can receive traffic from any of the existing active interfaces. Thus, given reachability from a remote client, the address of the loopback can be used to communicate with the router through various services such as telnet and SSH. In this way, the address on a loopback behaves identically to any of the local addresses of the router in terms of the processing of incoming packets. The Loopbacks menu page contains links to web pages that configure and display loopback parameters and data. To display this page, click Routing →Loopbacks in the tree view. Following are the web pages accessible from this menu page: • Loopbacks Configuration • Loopbacks Summary Loopbacks Configuration Use the Loopbacks Configuration page to create, configure, or remove loopback interfaces. You can also set up or delete a secondary address for a loopback. To display the page, click Routing →Loopbacks →Configuration in the tree view. Figure 9-55. Loopback Configuration The Loopbacks Configuration pages contain the following fields: 602 Configuring Routing