On Fri, Oct 1, 2010 at 4:10 AM, Wojciech Owczarek <wojci...@owczarek.co.uk> wrote: > This is just the way Juniper do things, just that it's not consistent > across all of their platforms. I've once been told by a Juniper > engineer that 1514 vs. 1518 MTU value is displayed (on the EX > platform at least) because the 4 bytes of CRC are not taken into > account as the CRC is not part of the media MTU (which kind of makes > sense). Excerpt from "Configure the Media MTU" in Juniper docs: > > "The actual frames transmitted also contain cyclic redundancy check > (CRC) bits, which are not part of the media MTU. For example, the > media MTU for a gigabit Ethernet interface is specified as 1500 bytes, > but the largest possible frame size is actually 1504 bytes; you need > to consider the extra bits in calculations of MTUs for > interoperability." > > So while not really a problem, this does cause some confusion. > > HTH, > > Cheers, > Wojciech
Thanks Felix and Wojciech, As you mentioned that is display problem and causes some confusion. I checked other Cisco Catalyst switches and I found similar "display" problem (or feature :p ). The switch interfaces no matter access or trunk are displayed with MTU 1500. I assume that is common display behavior on the switch interface in both Cisco and Juniper. Regards, -- Michel~ _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp