HP 6125G HP 6125G & 6125G/XG Blade Switches IRF Configuration Guide-R2 - Page 25

Setting the IRF link down report delay, Configuring MAD

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For the system software image and Boot ROM compatibility, see the release notes for the new software release. Setting the IRF link down report delay You can avoid IRF link flapping causing frequent IRF splits and merges during a short time 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. Command system-view 2. Set the IRF link down report delay. irf link-delay interval Remarks N/A By default, no IRF link down delay is configured. The recommended value range is 200 to 500 milliseconds. The greater the interval, the slower the service recovery. If your IRF fabric requires a fast master/subordinate or IRF link switchover or has deployed the BFD or GR feature, HP recommends setting the delay to zero seconds. Configuring MAD The switch supports the following MAD mechanisms for detecting multi-active collisions in different network scenarios: • LACP MAD • BFD MAD • ARP MAD These MAD detection mechanisms operate independently. You can configure all of them for an IRF fabric. Table 1 provides a reference for you to make a MAD mechanism selection decision. 21

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21
For the system software image and Boot ROM compatibility, see the release notes for the new software
release.
Setting the IRF link down report delay
You can avoid IRF link flapping causing frequent IRF splits and merges during a short time 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
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Set the IRF link down report
delay.
irf link-delay
interval
By default, no IRF link down delay is
configured.
The recommended value range is 200 to
500 milliseconds. The greater the interval,
the slower the service recovery.
If your IRF fabric requires a fast
master/subordinate or IRF link switchover or
has deployed the BFD or GR feature, HP
recommends setting the delay to zero
seconds.
Configuring MAD
The switch supports the following MAD mechanisms for detecting multi-active collisions in different
network scenarios:
•
LACP MAD
•
BFD MAD
•
ARP MAD
These MAD detection mechanisms operate independently. You can configure all of them for an IRF
fabric.
Table 1
provides a reference for you to make a MAD mechanism selection decision.