Changing Nic Frame Size; Jumbo Frames - HP StoreVirtual 4000 User Manual

To change the speed and duplex
1. In the navigation window, select the 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 the combination of speed and duplex that you want.
7. Click OK.
A series of status messages appears. Then the changed setting appears in the TCP status
report.
NOTE:
"Setting the TCP speed, duplex, and frame size" (page

Changing NIC frame size

Network frame size affects management data traffic and replication. Use the same network frame
size in all storage systems in a cluster to ensure consistent data traffic and replication.
IMPORTANT:
Set up the end-to-end network before creating storage volumes.
Best practices
Change the frame size while the storage system is in the Available Systems pool and not in a
management group.
The frame size specifies the size of data packets that are transferred over the network. The default
Ethernet standard frame size is 1500 bytes. The maximum allowed frame size is 9000 bytes.
Increasing the frame size improves data transfer speed by allowing larger packets to be transferred
over the network and by decreasing the CPU processing time required to transfer data. However,
increasing the frame size requires that routers, switches, and other devices on your network support
that frame size.
NOTE: Increasing the frame size can cause decreased performance and other network problems
if routers, switches, or other devices on your network do not support frame sizes greater than 1500
bytes. If you are unsure about whether your routers and other devices support larger frame sizes,
keep the frame size at the default setting.
If you edit the frame size on a disabled or failed NIC, the new setting will not be applied until the
NIC is enabled or connectivity is restored.
To avoid potential connectivity and performance problems with other devices on your network,
keep the frame size at the default setting. The frame size on the storage system should correspond
to the frame size on Windows and Linux application servers. If you decide to change the frame
size, set the same frame size on all storage systems on the network, and set compatible frame
sizes on all clients that access the storage systems.
Consult with your network administrator for recommended storage system frame sizes and the
corresponding frame sizes in bytes for Windows and Linux clients in your environment.

Jumbo frames

Frame sizes that are greater than 1500 bytes are called jumbo frames. Jumbo frames must be
supported and configured on each Windows or Linux client accessing the storage system and also
on each network switch between the storage system and the Windows or Linux clients. Failure to
48 Managing the network
You can also use the Configuration Interface to edit the speed and duplex. See
The network settings must be the same for the switches, clients, and storage systems.
241).