HP Integrity BL890c - i2 Server Manual page 158

Configuring Fast MAC Cache Failover
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When an uplink on a VC Ethernet Module that was previously in standby mode becomes active, it
can take several minutes for external Ethernet switches to recognize that the c-Class server blades
can now be reached on this newly active connection.
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Enabling Fast MAC Cache Failover forces Virtual Connect to transmit Ethernet packets on newly
active links, which enables the external Ethernet switches to identify the new connection (and update
their MAC caches appropriately). This transmission sequence repeats a few times at the MAC refresh
interval (five seconds is the recommended interval) and completes in about one minute.
Configuring the VC Module for Tunnel VLAN Tags via GUI (Ethernet settings)
Note: Flex-10 has also provided additional controls when configuring VC for mapped VLAN tags
(Multiple Networks over a single link) support. These features provide the ability to set a Custom or
Preferred network speed value for each NIC. These are VC domain settings and when configured will
limit the maximum configurable speed of a NIC.
Enable Tunnel VLAN Tags within Virtual Connect
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On the Virtual Connect Manager screen, Left pane, click Ethernet Settings, Advanced Settings
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Select Tunnel VLAN Tags
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Select Fast MAC Cache Fail-over with a refresh of 5
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Optionally, select a preferred/Maximum link speed
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Select Apply
Configuring the VC Module for VLAN Tunneling via CLI (Ethernet settings)
The following command can be copied and pasted into an SSH based CLI session with Virtual Connect
# Set Advanced Ethernet Settings to "Tunnel VLAN Tags" and Enable Fast MAC cache fail-over
set enet-vlan vlantagcontrol=Tunnel
set mac-cacheEnabled=True Refresh=5
Note: Do not set a Preferred or Max speed for this scenario. This example is provided for reference
only. For the purpose of this scenario, we will not be configuring the custom values for Preferred Link or
Maximum Connection speeds. However, the CLI commands are provided below for reference.
Selecting the Set a Customer value for Preferred Link Connection Speed and/or Set a Customer value for
Maximum Link Connection Speed, Sets the respective speed for all connections using multiple networks to
500Mb and maximum connection speed to 2.5Gb.
# Set Advanced Ethernet Settings to a Preferred speed of 500Mb and a Max Speed of 2500Mb
set enet-vlan PrefSpeedType=Custom PrefSpeed=500 MaxSpeedType=Custom MaxSpeed=2500
Scenario 2:4 - Flex-10 - VLAN Tagging (802.1Q) with Multiple Shared Uplink Sets (SUS) and Tunneled VLANs - ESX 4 158