17
To do…
Use the command…
Remarks
3.
Configure the port-
specific load sharing
criteria
irf-port load-sharing mode
{
destination-ip
|
destination-mac
|
source-ip
|
source-mac
} *
Required.
By default:
•
The A5800-48G Switch with 1
Interface Slot (JC105A), A5800-
48G TAA Switch with 1 Interface
Slot (JG258A), A5800-48G-PoE+
Switch with 1 Interface Slot
(JC104A), and A5800-48G-PoE+
TAA Switch with 1 Interface Slot
(JG257A) base load sharing
calculation on the incoming port
number.
•
Other models in the A5800 and
A5820X series use the
combination of source and
destination MAC addresses as the
load sharing criteria for Layer 2
packets, and the combination of
source and destination IP
addresses for Layer 3 packets.
Specifying the preservation time of bridge MAC address
CAUTION:
•
Bridge MAC address change can cause transient traffic interruption.
•
When deploying the ARP MAD with MSTP solution, you must enable the IRF virtual device to change
its bridge MAC address as soon as the master leaves.
An IRF virtual device uses the bridge MAC address of the master switch as its bridge MAC address. The
IRF virtual device uses bridge MAC address to identify the IRF virtual device by Layer 2 protocols such as
MSTP and LACP. It uses bridge MAC address for generating an MAC address for a Layer 3 interface.
As with any other node on a switched LAN, this bridge MAC address must be unique for proper
communication.
To avoid duplicate bridge MAC addresses, an IRF virtual device can change its bridge MAC address
automatically after its master leaves, but the change can cause temporary service interruption.
Depending on your network condition, you can enable the IRF virtual device to preserve or change its
bridge MAC address after the master leaves. The following lists available options:
•
irf mac-address persistent timer
—Preserves the bridge MAC address for 6 minutes after the master
leaves. If the master does not come back before the timer expires, the IRF virtual device uses the
bridge MAC address of the newly elected master as its bridge MAC address. This option avoids
unnecessary switching of bridge MAC address due to a device reboot or transient link failure.
•
irf mac-address persistent always
—Keeps the bridge MAC address even after the master leaves.
•
undo irf mac-address persistent
—Uses the bridge MAC address of the newly elected master to
replace the original one as soon as the master leaves.
