3Com S7906E - Switch, Руководство по настройке

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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… Use the command… Remarks
Enter system view system-view —
Set the delay time for the link
layer to report a link-down
event of an IRF
irf link-delay interval
Optional
The default value is 200 ms.
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 Figure 1-6 and Figure
1-7 respectively.
Figure 1-6 Network diagram for LACP MAD detection
LACP MAD detection link
Device A Device B
IRF link
Device C
（
Intermediate device
）
IRF