Configuring Mad Detection - 3Com S7906E Configuration Manual

handles the problem accordingly. Use this function to avoid adding additional overhead to the system
caused by the frequent link state changes of an interface in a short time.
Follow these steps to set the delay time for the link layer to report a link-down event of an IRF:
To do...
Enter system view
Set the delay time for the link
layer to report a link-down
event of an IRF
Do not set the time interval to a very long time; otherwise, the IRF system will not be aware of the IRF
topology changes in time and thus the service will be recovered slowly.

Configuring MAD Detection

IRF of distributed devices supports two MAD approaches: BFD MAD detection and LACP MAD
detection. The LACP MAD detection requires intermediate devices, which must be capable of
identifying and processing LACPDU protocol packets carrying Active ID values; the BFD MAD detection
requires either direct connection or intermediate devices.
Network diagram for LACP MAD detection and BFD MAD detection are shown in
1-7 respectively.
Figure 1-6 Network diagram for LACP MAD detection
Device A
LACP MAD detection link
IRF link
Use the command...
system-view
irf link-delay interval
IRF
Device C
（Intermediate device）
Device B
1-14
Remarks
—
Optional
The default value is 200 ms.
Figure 1-6 and Figure