Specifying The Preservation Time Of Irf Bridge Mac Address - 3Com S7906E Configuration Manual

To do...
Create an IRF port and enter
IRF port view
Bind physical IRF port(s) to an
IRF port
An IRF port that is bound with multiple physical IRF ports is an aggregation IRF port, which
increases the bandwidth and reliability on the IRF port.
You can bind multiple physical IRF ports to one IRF port by executing the port group interface
command for multiple times. In addition, the S7900E series allows you to bind multiple physical IRF
ports on different LPUs to one IRF port.
Before binding a physical IRF port to an IRF port or canceling such a binding, you must manually
disable the physical IRF port (that is, execute the shutdown command on the port). After finishing
your operation, you should manually enable the physical IRF port (that is, execute the undo
shutdown command on the port).
The mode keyword in the port group command specifies the working mode of a physical IRF port.
By default, the working mode of a physical IRF port is normal. An SC interface card does not
support configuration of the working mode of physical IRF ports as enhanced.
Physical IRF ports that connect two member devices in an IRF must be configured to work in the
same mode.
To use the virtual private LAN service (VPLS) function in an IRF, configure the working mode of
physical IRF ports as enhanced.

Specifying the Preservation Time of IRF Bridge MAC Address

A device uses the bridge MAC address when it communicates with the outside as a network bridge. A
bridge device on the network has its unique bridge MAC address. Some Layer 2 protocols (like LACP)
use bridge MAC addresses to identify different devices. During the forwarding of Layer 2 packets, if the
destination MAC address of a packet is the bridge MAC address of a device, it means that the packet is
sent to this device.
In an IRF, the bridge MAC address of a member device is called member bridge MAC address. The IRF
communicates with the outside as a single device; therefore, it also has a bridge MAC address, which is
called the IRF bridge MAC address. Typically, an IRF uses the bridge MAC address of the master
device as the IRF bridge MAC address.
You are recommended to configure the preservation time of IRF bridge MAC address properly,
otherwise, network problems will occur:
Use the command...
irf-port member-id/port-number
port group interface
interface-type interface-number
[ mode { enhanced | normal } ]
1-12
Remarks
Required
By default, no IRF port is
created on the device.
If the IRF port is already
created, this command enters
IRF port view.
Required
By default, no IRF port is
created on the device.