You should follow certain guidelines when configuring clients for jumbo frames:
- Configure jumbo frames on the client as well as on your storage
system. Find out how to configure jumbo frames on your client by
checking the network adapter documentation for your client.
- Enlarge the client's TCP window size. The minimum value for the client's window size should be two
times the MTU size, minus 40, and the maximum value can be the
highest value your system allows. Typically, the maximum value you
can set for your client's TCP window is 65,535. If your storage system is configured to support jumbo frames and
the client is not, the communication between the storage system and
the client occurs at the client's frame size.
- Ensure that the User Datagram Protocol (UDP) clients are
configured with the same MTU size as your storage system. UDP clients do not communicate their MTU size. Therefore, your
storage system and the client should be configured with the same
MTU size, or the storage system might send packets that the clients
cannot receive.
- Check the MTU of any intermediate subnets if your storage
system and the client are on different subnets. If the storage system and the client (both configured to use
jumbo frames) are on different subnets and an intermediate subnet
does not support jumbo frames, the intermediate router fragments
the IP packets and the advantages of using jumbo frames are
lost.
