Note: If you modify parameters and put the system into service before rebooting, you may experience configuration problems.

Perform this command to reboot the system:

#reboot

4.Verify the configuration changes.

Enter the following command and verify that the MTU size is set to 9000:

#ifconfig -a

Dual Homing

When two ITI-5100G/GF adapters are installed in the same server, they can be paired in a Dual Homing configuration. If traffic is not seen over the primary adapter connection due to loss of the adapter, cable, switch port, or switch (where the two adapters are attached to separate switches), the secondary adapter becomes active. When it becomes active, the secondary adapter uses the MAC and IP address originally assigned to the primary adapter. Sessions should be maintained, with minimum impact to network traffic.

Overview

The Dual Homing feature relies on the Spanning Tree Protocol. Adapters configured for Dual Homing allow Spanning Tree Protocol packets to pass between them. This causes the Spanning Tree Protocol to detect a loop in the network, forcing the switch port connected to one of the adapters to go into blocking mode. The blocked adapter becomes the secondary.

Both Connections Ready Spanning Tree Loop Detected: ACEnic #1 is active

ACEnic #2 is blocked at switch port

Primary Connection Failed Loop Resolved:

ACEnic #1 has dropped from service ACEnic #2 is active

Figure 7: Dual Homing with Spanning Tree

If the primary connection becomes disabled for any reason, the Spanning Tree Protocol will detect the loss of the loop, and will change the switch port connecting the secondary adapter from blocking mode to forwarding mode.

LSI Logic Corporation

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