On 11/7/11 8:45 AM, Deric Kwok wrote: > When I setup the server mtu as 9100. why I have to configure the > switch mtu 9300 to make it working? > > What this extra 200 bytes is for what purpose? ls it standard?
MTUs above 2000 bytes are nonstandard. The most recent Ethernet spec, 802.3-2008, defines a maxBasicFrameSize of 1518 octets and a maxEnvelopeFrameSize size of 2000 octets to accommodate various encap mechanisms. > What is disadvantage of setting our all internal networks (host / > equipment) mtu more than 1500? In a single data center at 1-Gbit/s rates or above, probably none, provided all devices support and use the same MTU. In other scenarios jumbos can lead to the various problems Iljitsch mentioned. dn
