3Com S7906E - Switch, Configuration Manual

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IRF Configuration Examples
BFD-MAD Enabled IRF Configuration Example
Network requirements
As shown in Figure 1-8 , the number of PCs on the enterprise network is outgrowing the number of ports
available on the access switches. To accommodate to business growth, the number of ports at the
access layer must be increased while the present investments of the customer are protected. In
addition, the ease of management and maintenance must be ensured.
Figure 1-8 Network diagram for IRF (using BFD MAD detection)
XGE1/3/0/25
(IRF-port1/2) XGE2/3/0/25
(IRF-port2/1)
GE1/3/0/1
GE2/3/0/1
Device A Device B
IRF
Note: The solid orange line represents the IRF link; the solid magenta line represents
link used for LACP MAD detection; the solid black lines represent Ethernet links.
IP network
Configuration considerations
z
To increase the number of access ports, additional devices are needed. In this example, Device B
is added.
z
To address the requirements for high availability, ease of management and maintenance, use IRF2
technology to create an IRF with Device A and Device B at the access layer.
z
To offset the risk of IRF splits, configure MAD to detect multi-active IRF collisions. In this example,
BFD MAD is adopted because the downlinks of devices are PCs instead of aggregated networking.
Configuration procedure
1) Device A and Device B are not connected. Power them on and configure them separately.
# Configure Device A.
<Sysname> system-view
[Sysname] chassis convert mode irf
This command will convert the device to IRF mode and the device will reboot. Are you sure?
[Y/N]: y
The device reboots automatically to switch its operating mode. After logging in to the device again,
create IRF-port1/2 of the device, bind it to the physical IRF port Ten-GigabitEthernet 1/3/0/25, and then
save the configurations.
<Sysname> system-view