Setting The Irf Link Down Report Delay; Configuring Mad - HP 10500 Series Configuration Manual

Configuration procedure
To enable an IRF fabric to automatically synchronize software images of the master to the devices you are
adding to the IRF fabric:
Step
1. Enter system view.
2. Enable software
auto-update.

Setting the IRF link down report delay

Link flapping causes frequent IRF splits and merges during a short time. You can avoid this situation by
configuring the IRF ports to delay reporting link down events. An IRF port works as follows:
When the IRF link changes from up to down, the port does not immediately report the change to the
•
IRF fabric. If the IRF link state is still down when the delay time is reached, the port reports the
change to the IRF fabric.
When the IRF link changes from down to up, the link layer immediately reports the event to the IRF
•
fabric.
To set the IRF link down report delay:
Step
1. Enter system view.
2. Set the IRF link down report
delay.

Configuring MAD

The following MAD mechanisms are available for detecting multi-active collisions in different network
scenarios:
LACP MAD
•
• BFD MAD
LACP MAD handles collisions in a different way than BFD MAD. To avoid conflicts, do not enable LACP
MAD together with BFD MAD in an IRF fabric.
Table 1 provides a reference for you to make a MAD mechanism selection decision.
Command
system-view
irf auto-update enable
Command
system-view
irf link-delay interval
26
Remarks
N/A
By default, this function is
enabled.
Remarks
N/A
The default IRF link down report delay is 4000
milliseconds (4 seconds).
HP recommends setting the delay to 0 seconds
in one of the following situations:
•
The IRF fabric requires a quick
master/subordinate or IRF link switchover.
•
The BFD or GR feature is used.
If the CFD feature is used in the IRF fabric,
make sure the delay interval is shorter than the
maximum CCM lifetime. For more information
about CFD, see High Availability
Configuration Guide.