Cisco Systems IC-23 Configuring PA-12E/2FE Port Adapter, Duplex Command, Speed Command, duplex

Configuring LAN Interfaces

Configuring an Ethernet or Fast Ethernet Interface

Table 3	Relationship Between Duplex and Speed Command Options
Duplex Command		Speed Command	Resulting System Actions
duplex auto		speed auto	Autonegotiates both speed and
			duplex modes.
duplex auto		speed 100 or speed 10	Autonegotiates both speed and
			duplex modes.
duplex half		speed auto	Autonegotiates both speed and
or			duplex modes.
duplex full
duplex half		speed 10	Forces 10 Mbps and half duplex.
duplex full		speed 10	Forces 10 Mbps and full duplex.
duplex half		speed 100	Forces 100 Mbps and half
			duplex.
duplex full		speed 100	Forces 100 Mbps and full
			duplex.

Configuring PA-12E/2FE Port Adapter

The PA-12E/2FE Ethernet switch port adapter provides Cisco 7200 series routers with up to twelve 10-Mbps and two 10/100-Mbps switched Ethernet (10BASE-T) and Fast Ethernet (100BASE-TX) interfaces for an aggregate bandwidth of 435 Mbps, full-duplex. The PA-12E/2FE port adapter supports the Ethernet, IEEE 802.3, and IEEE 802.3u specifications for 10-Mbps and 100-Mbps transmission over UTP cables.

The PA-12E/2FE port adapter offloads Layer 2 switching from the host CPU by using store-and-forward or cut-through switching technology between interfaces within the same virtual LAN (VLAN) on the PA-12E/2FE port adapter. The PA-12E/2FE port adapter supports up to four VLANs (bridge groups).

Note The PA-12E/2FE port adapter is a dual-width port adapter, which means it occupies two horizontally aligned port adapter slots when installed in a Cisco 7200 series router. (Single-width port adapters occupy individual port adapter slots in a Cisco 7200 series router.)

All interfaces on the PA-12E/2FE port adapter support autosensing and autonegotiation of the proper transmission mode (half-duplex or full-duplex) with an attached device. The first two PA-12E/2FE interfaces (port 0 and port 1) also support autosensing and autonegotiation of the proper connection speed (10-Mbps or 100-Mbps) with an attached device. If an attached device does not support autosensing and autonegotiation of the proper transmission mode, the PA-12E/2FE interfaces attached to the device automatically enter half-duplex mode. Use the show system:running-configcommand to determine if a PA-12E/2FE interface is autosensing and autonegotiating the proper transmission mode with an attached device. Use the full-duplexand the half-duplexcommands to change the transmission mode of a PA-12E/2FE interface. After changing the transmission mode, use the show interfaces command to verify the interface’s transmission mode.

Cisco IOS Interface Configuration Guide

IC-28