Hitachi Compute Blade 2000 User Manual page 866

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This uplink failover function handles the external network

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failure where linkdown occurs in the physical layer.
This uplink failover function switches paths when
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detecting the following linkdown as failure.
- The shutdown command is executed to the target port;
- The primary LAN switch module or the external
network device connected to the primary LAN switch
module is powered off; and
- Reboot.
When the channel group for link aggregation is targeted

for this uplink failover function, the communication path
will not be switched unless all ports belonging to the
channel group link down.
 Failure recovery
When all target ports for this function are linked up in the primary LAN switch module,
inactive connection ports for server blades will be activated. When the channel group
for link aggregation is targeted for this function, linkup of a single port, which belongs to
the channel group, will activate those server blade connection ports. Server blades
detect that those server blade connection ports are activated, and then redundancy
configuraiton will be restored. With NIC teaming set as described in the previous page,
the primary communication path will be recovered.
This function cannot be set with spanning tree, Gigabit Switch Redundancy

Protocol (GSRP), or Virtual Router Redundancy Protocol (VRRP).
When setting this function to the port of a link aggregation, set this the channel

group to which the port belongs.
Set this function only when the target external port and the link aggregation

channel group have linked up.
See "Configuration Command" in the Firmware & Accessory CD for Compute Blade
Built-in LAN Switch Module that is attached to the device for the uplink failover function
setting.
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You can specify any uplink port and port for connection to the
Tip
server blade and then use the uplink failover function on the
target port.
See Configuration Settings in the Firmware & Accessory CD
for Compute Blade Built-in LAN Switch Module attached to
the device.
NOTICE
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