11.0 HP StoreVirtual Storage User Guide (AX696-96275, December 2013)

configure jumbo frames on each client and each network switch may result in data unavailability
or performance degradation.
Jumbo frames can co-exist with 1500 byte frames on the same subnet if the following conditions
are met:
• Every device downstream of the storage system on the subnet must support jumbo frames.
• If you are using 802.1q virtual LANs, jumbo frames and nonjumbo frames must be segregated
into separate VLANs.
NOTE: The frame size for a bonded logical interface must be equal to the frame size of the
NICs in the bond.
Editing the NIC frame size
1. In the navigation window, select a storage system and log in.
2. Open the tree, and select Network.
3. Click the TCP Status tab.
4. Select the interface to edit.
5. Click TCP Status Tasks, and select Edit.
6. Select Set To in the Frame Size section.
7. Enter a value between 1500 and 9000 bytes in the Set To box.
8. Click OK.
A series of status messages display. Then the changed setting appears in the TCP status report.
NOTE: You can also use the Configuration Interface to edit the frame size. See “Setting the TCP
speed, duplex, and frame size” (page 249).
Changing NIC flow control
Flow control on the NICs prevents data transmission overruns that result in packets being dropped.
With flow-control enabled, network packets that would otherwise be dropped will not have to be
retransmitted. Auto-negotiate is the default setting for NIC flow control. You can change the setting
to manually choose the transmit and receive settings for the NIC.
IMPORTANT: The VSA does not support changing flow control settings.
Requirements
• These settings must be configured before creating NIC bonds.
• All NICs should have (or must have, if they are bonded) the same flow control settings. You
can bond NICs with different flow control settings. However, the bond changes both NICs to
the same flow control settings, using the settings of the preferred NIC.
• Flow control cannot be changed when the port is disabled.
IMPORTANT: The network settings must be the same for the switches, clients, and storage systems.
Set up the end-to-end network before creating storage volumes.
Changing NIC flow control settings
1. In the navigation window, select a storage system, and log in.
2. Open the tree, and select the Network category.
3. Click the TCP Status tab.
4. Select the interface to edit.
5. Click TCP Status Tasks, and select Edit.
50 Managing the network