Configuring Transparent Bridging
Transparent and SRT Bridging Configuration Task List
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Cisco IOS Bridging and IBM Networking Configuration Guide
Note If you plan to use a PA-12E/2FE interface to boot from a network (TFTP), ensure that the
interface is configured for a loop-free environment, an IP address is configured for the
interface’s bridge-group virtual interface, and system boot image 11.2(10)P is installed on
your router (use the show version command to view your router’s system boot image).
Then, before booting from the network server, use the bridge-group bridge-group number
spanning-disabled command to disable the Spanning-Tree Protocol configured on the
interface to keep the TFTP server from timing out and closing the session.
For detailed information about boot from a network (TFTP), loading a system image from
a network server, and configuring the Spanning-Tree Protocol on your Cisco7200 series
router, refer to the PA-12E/2FE Ethernet Switch10BASE-T and 100BASE-TX Port Adapter
Installation and Configuration that accompanies the hardware and to the Cisco IOS
Configuration Fundamentals Configuration Guide and Cisco IOS Bridging and IBM
Networking Configuration Guide publications.
For information on other commands that can be used to configure a PA-12E/2FE port adapter, refer to
the “Configuring Interfaces” chapter in the Cisco IOS Configuration Fundamentals Configuration
Guide.
For PA-2E/2FE port adapter configuration examples, see “Configuration of Transparent Bridging for
PA-12E/2FE Port Adapter Example” and “Configuration of IRB for PA-12E/2FE Port Adapter Example”
in the Transparent and SRT Bridging Configuration Examples section.
Configuring the PA-12E/2FE Port Adapter
This section provides instructions for a basic configuration. You might also need to enter other
configuration commands depending on the requirements for your system configuration and the protocols
you plan to route on the interface.
To configure the interfaces on the PA-12E/2FE port adapter, perform the following tasks in global
configuration mode:
Command Purpose
Step1 bridge bridge-group protocol ieee Specifies the type of Spanning-Tree Protocol. The PA-12E/2FE port
adapter supports DEC and IEEE Spanning-Tree Protocols; however,
we recommend using the IEEE protocol when configuring bridge
groups.
Step2 interface fastethernet slot/port
(for ports 0 and 1)
interface ethernet slot/port
(for ports 2 through 13)
Enters the interface you want to configure.
Step3 bridge-group bridge-group Assigns a bridge group to the interface.
Step4 cut-through [receive | transmit]Optionally, configures the interface for cut-through switching
technology. The default is store-and-forward.
Step5 full-duplex Optionally, if an attached device does not support autosensing or
autonegotiation, configures the transmission mode for full-duplex.
The default is half-duplex.
Step6 no shutdown Changes the shutdown state to up.
Step7 exit Returns to configuration mode.