Port Settings Window

This window appears when you take either of these actions:

You can also click here to launch it.

Begin by selecting a host from the Host Name list. Information about the host ports is on these tabs:

Configuration Settings

These instructions tell you how to modify the settings and how to enter interface descriptions on a host switch. If you need an explanation of the settings, see Settings Table.

If the host is a Long-Reach Ethernet (LRE) switch, you see two additional columns on the tab: LRE Upstream and LRE Downstream. These columns apply to the LRE link on the LRE ports. All the other columns apply to the CPE Ethernet link associated with the LRE ports. The LRE link represents the connection between a LRE switch and LRE customer-premises equipment (CPE) device such as the Cisco 575 LRE CPE. The CPE Ethernet link represents the connection between the CPE Ethernet port and a remote Ethernet device such as a PC. LRE port configuration and monitoring involves both links. Use the Modify Port Settings window to change the CPE Ethernet link settings. Use the LRE Profiles window to change the LRE link settings. To display the LRE Profiles window, choose Device > LRE Profiles. For information about profiles, see Assigning Profiles to LRE Ports. For more descriptions and considerations about configuring the LRE ports, see LRE Port Considerations.

Note: You can configure and monitor the Ethernet link on a Cisco 575 LRE CPE. However, you cannot configure the Ethernet links on a Cisco 585 LRE CPE. You can only monitor the Ethernet links on the Cisco 585 LRE CPE by using the show remote interfaces status user EXEC command.

To modify settings:

  1. Select one or more ports.
    To select several ports, hold down the Ctrl key and make your selections, or hold down the Shift key and select the first and last port in a range.
  2. Click Modify to display the Modify Port Settings window.
  3. Complete the window.
  4. Click OK to put your changes into effect and to close the window.
    Your new settings are displayed in the Port Settings window.
  5. Click OK to close the window.

To add or modify interface descriptions:

  1. Select one or more ports.
  2. Click Describe to display the Basic Port Description window.
  3. Complete the window.
    Note: From the Basic Port Description window, you can go to the Advanced Port Description window to specify automatic incrementation of up to three descriptors.
  4. Click OK to save your descriptions and to close the window.
    The descriptions appear in the Port Settings window.
  5. Click OK to close the window.

If you select multiple ports and specify a configuration setting that is not valid for a selected port, the current setting remains unchanged. For example, if you select a 10BaseT Ethernet, a Fast Ethernet, and a Gigabit port and then select a speed of 100 Mbps, the 10BaseT Ethernet port remains set to 10 Mbps, and the Gigabit port remains set to 1000 Mbps.

Runtime Status

This table explains the read-only information on this tab.

Note: You can configure and monitor the Ethernet link on a Cisco 575 LRE CPE. However, you cannot configure the Ethernet links on a Cisco 585 LRE CPE. You can only monitor the Ethernet links on the Cisco 585 LRE CPE by using the show remote interfaces status user EXEC command.

Column Explanation
Interface
Identifies the port: Fast Ethernet, Gigabit Ethernet, ATM, or FDDI, the module or slot number (0, 1, or 2), and the port number.
DescriptionThe description of the interface.
LRE Link

LRE switches only

The state of the LRE link between the switch LRE port and CPE RJ-11 wall port. If the LRE link state is down, no status is available in the other columns.

 

Ethernet Link The state of the port. The status of a port can be up, down, or administratively down.

Note:
On a LRE port, this is the state of the Ethernet port on a Cisco 575 LRE CPE. If a Cisco 585 LRE CPE is connected, "NA" appears in this column. To display the status of the Cisco 585 LRE CPE, use the show remote interfaces status user EXEC command.
Duplex The duplex state of the port.
For ATM ports, this field displays full.

Note: On a LRE port, this is the duplex mode of the Ethernet port on a Cisco 575 LRE CPE. If a Cisco 585 LRE CPE is connected, "NA" appears in this column. To display the status of the Cisco 585 LRE CPE, use the show remote interfaces status user EXEC command.
Speed

The speed of the port.
For Gigabit Ethernet ports, this field is read-only and displays 1000 (1000 Mbps).
For ATM ports, this field is read-only and displays 155 (155 Mbps).

Note:
On a LRE port, this is the speed of the Ethernet port on the Cisco 575 LRE CPE. If a Cisco 585 LRE CPE is connected, "NA" appears in this column. To display the status of the Cisco 585 LRE CPE, use the show remote interfaces status user EXEC command.

This setting does not show the upstream and downstream LRE link speeds, which are defined by the active profile on the LRE port. The Configuration Settings tab shows the LRE link speeds. For information about LRE ports and LRE profiles, see LRE Port Considerations and Assigning Profiles to LRE Ports.

LRE Port Considerations

The LRE switches use Long-Reach Ethernet (LRE) technology to transfer data, voice, and video traffic over categorized and noncategorized unshielded twisted-pair cable (Category 1, 2, and 3 structured and unstructured cable such as existing telephone lines). Connecting a switch LRE port to a remote Ethernet device (such as a PC) requires two types of connections:

The actual line speed in either direction between a switch LRE port and remote Ethernet device depends on the LRE link speed and the CPE Ethernet link speed. For example, if a PC Ethernet port is configured to 100 Mbps and the LRE port is configured with an upstream link speed of 5.69 Mbps, the actual upload rate provided to the PC user is 5.69 Mbps, not 100 Mbps.

LRE Links

The LRE link settings define the connection between the switch LRE port and the CPE RJ-11 wall port. The LRE link provides symmetric and asymmetric bandwidth for data, voice, and video traffic. Symmetric transmission is when the downstream and upstream bandwidths are the same. Asymmetric transmission is when the downstream and the upstream bandwidths differ. Downstream transmission refers to the traffic traveling from the LRE switch to the CPE. Upstream transmission refers to the traffic traveling from the CPE to the LRE switch.

The switch controls bandwidth on the LRE link by using configurations called profiles. A LRE profile configures the upstream and downstream rates on the LRE link. Depending on the profile, the upstream and downstream bands on a LRE link can range from approximately 1 Mbps to 15 Mbps. By default, all LRE ports on the switch are enabled with the LRE-10 private profile. This profile allows the upstream and downstream transmission rate on the LRE link to be 10 Mbps.

You can assign profiles on a per-port or switch-wide basis. When the LRE port establishes a link with the CPE, the switch downloads its profile settings to the CPE so that the CPE and switch port operate with the same configuration. For more information about profiles, see Assigning Profiles to LRE Ports.

CPE Ethernet Links

The CPE Ethernet link settings define the connection between the CPE Ethernet port and a remote Ethernet device, such as a PC. The Ethernet ports on the Cisco LRE CPEs support autonegotiation for port speed and duplex mode. The default speed is auto; the default duplex mode is half duplex with back pressure. (You cannot configure the flow-control setting on the CPE Ethernet ports. This setting is automatically disabled in half-duplex mode and automatically enabled in full-duplex mode.)

Note: You cannot configure the Cisco 585 LRE CPE Ethernet ports. However, you can configure the Cisco 575 LRE CPE Ethernet port to operate at 10 or 100 Mbps and at half- or full-duplex mode, depending on the capability of the remote Ethernet device.

When configuring the CPE Ethernet links, keep in mind the following guidelines: