Tim, The IXF440 will process packets upto the size programmed into the 'Maximium Packet Size' register, although this accepts values upto 15 bits, you should limit this to Jumbo packet length. Rgds Mick -----Original Message----- From: ixp1200-bounces@lists.cs.princeton.edu [mailto:ixp1200-bounces@lists.cs.princeton.edu] On Behalf Of Tim Stevens Sent: 04 March 2004 15:27 To: ixp1200@lists.cs.princeton.edu Subject: [ixp1200] IXP1200 or IXF440 maximum MTU Hi, Can anyone tell me whether the IXP1200 boards (ours=ENP-2505) are capable of processing ethernet frames larger than 1500 bytes? Or is the IXF440 the limiting factor? I'm asking this because it might be practical to implement VLAN tagging 802.1Q (this adds 4 bytes to an ethernet frame) or other layer 2 features. Thanks. Kind regards, Tim _______________________________________________ ixp1200 mailing list ixp1200@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/ixp1200