On Fri, Apr 27, 2012 at 07:40:43AM -0500, Eric Helm wrote: > > > On 4/26/2012 4:32 PM, OBrien, Will wrote: > > We've been pushing out jumbo frames across our new core lately. Right now > > I've got multiple boxes from multiple vendors that all support different > > maximum MTUs. > > > > Example: Juniper MX960/480, Nexus 7009, Nexus 5k/2k, Catalyst 4900, > > Nortel/Avaya 8600.... All different maximums. > > > > Anyone have suggestions for a best practice MTU? (That is.... over 9000?!) > > I just ran across this the other day. Some good reading and looks like a > push to standardize 9000 byte MTU across the board. > > https://ripe64.ripe.net/presentations/139-Hurricane_Electric_-_Martin_Levy_-_IX_Jumbo_Frames_-_RIPE64_EIX-WG_-_Slovenia.pdf > http://www.ietf.org/id/draft-mlevy-ixp-jumboframes-00.txt
9000 for IP mtu provided to end users / customers is a nice round number. I have started using 9100 as the internal mtu as it leaves 100 bytes for any encap overhead you might want from mpls/gre/etc and is easy to remember. Colin -- Colin Whittaker +353 (0)86 8211 965 http://colin.netech.ie [email protected] _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
