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•
When the IRF link changes from down to up, the link layer immediately reports the event to the
IRF fabric.
When you configure the IRF link down report delay, follow these restrictions and guidelines:
•
Make sure the IRF link down report delay is shorter than the heartbeat timeout settings of
upper-layer protocols (for example, CFD). The heartbeat timeout setting is the interval for a link
to be determined as down by an upper-layer protocol. If the report delay is longer than the
timeout setting of a protocol, unnecessary recalculations might occur.
•
Set the delay to 0 seconds in the following situations:
{
The IRF fabric requires a fast master/subordinate or IRF link switchover.
{
The BFD or GR feature is used.
{
You want to shut down an IRF physical interface or reboot an IRF member device. (After you
complete the operation, reconfigure the delay depending on the network condition.)
Examples
# Set the IRF link down report delay to 300 milliseconds.
<Sysname> system-view
[Sysname] irf link-delay 300
irf mac-address persistent
Use
irf mac-address persistent
to configure IRF bridge MAC persistence.
Use
undo irf mac-address persistent
to enable the IRF fabric to change its bridge MAC address as
soon as the address owner leaves.
Syntax
irf mac-address persistent
{
always
|
timer
}
undo irf mac-address persistent
Default
After the address owner leaves, the IRF bridge MAC address remains unchanged for 6 minutes. If
the address owner does not rejoin the IRF fabric within the time limit, the fabric uses the bridge MAC
address of the current master as the bridge MAC address.
Views
System view
Predefined user roles
network-admin
Parameters
always
: Enables the IRF bridge MAC address to be permanent. The IRF bridge MAC address does
not change after the address owner leaves.
timer
: Enables the IRF bridge MAC address to remain unchanged for 6 minutes after the address
owner leaves. If the address owner rejoins the IRF fabric within the time limit, the IRF bridge MAC
address does not change. If the address owner does not rejoin within the time limit, the IRF fabric
uses the bridge MAC address of the current master as the bridge MAC address.
Usage guidelines
The command setting takes effect only after the address owner leaves the IRF fabric. Events such as
active/standby or master/subordinate switchovers cannot trigger the command setting to take effect.
IRF bridge MAC persistence specifies the amount of time an IRF fabric can continue to use a bridge
MAC address as its bridge MAC address after the address owner leaves.
