From the manual page 723, I guess I didn't look hard enough and dell support was able to find it for me.  ip mtu Use the ip mtu command in Interface Configuration mode to set the IP Maximum Transmission Unit (MTU) on a routing interface. The IP MTU is the size of the largest IP packet that can be transmitted on the interface without fragmentation. Use the no form of the command to return the MTU size to the default value. Software currently does not fragment IP packets. Packets forwarded in hardware ignore the IP MTU. Packets forwarded in software are dropped if they exceed the IP MTU of the outgoing interface. Packets originated on the router, such as OSPF packets, may be fragmented by the IP stack. The IP 724 IP Routing Commands stack uses its default IP MTU and ignores the value set using the ip mtu command. OSPF advertises the IP MTU in the Database Description packets it sends to its neighbors during database exchange. If two OSPF neighbors advertise different IP MTUs, they will not form an adjacency (unless OSPF has been instructed to ignore differences in IP MTU with the ip ospf mtuignore command). Syntax ip mtu integer • integer — Specifies the distance (preference) of an individual static route. (Range: 68-9198) Default Configuration 1500 bytes is the default configuration. Command Mode Interface Configuration (VLAN) mode
trying to find out if the 6248 switches support jumbo frames between intervlan routing? large packet pings in the same vlan work, but when trying to ping between vlans the largest packet size is 1582 where can i get info on the full support of jumbo frames and intervlan routing?    
powerconnect 6248 jumbo frames support intervlan routing