nanog mailing list archives
Re: Internet Exchanges supporting jumbo frames?
From: Chris Woodfield <rekoil () semihuman com>
Date: Thu, 17 Mar 2016 10:49:37 -0700
I think that’s the problem in a nutshell…until every vendor agrees on the size of a “jumbo” packet/frame (and as such, allows that size to be set with a non-numerical configuration flag). As is, every vendor has a default that results in 1500-byte IP MTU, but changing that requires entering a value…which varies from vendor to vendor. The IEEE *really* should be the ones driving this particular standardization, but it seems that they’ve explicitly decided not to. This is…annoying to say the least. Have their been any efforts on the IETF side of things to standardize this, at least for IPv4/v6 packets? -C
On Mar 9, 2016, at 10:38 PM, Frank Habicht <geier () geier ne tz> wrote: Hi, On 3/10/2016 9:23 AM, Tassos Chatzithomaoglou wrote:Niels Bakker wrote on 10/3/16 02:44:* nanog () nanog org (Kurt Kraut via NANOG) [Thu 10 Mar 2016, 00:59 CET]:I'm pretty confident there is no need for a specific MTU consensus and not all IXP participants are obligated to raise their interface MTU if the IXP starts allowing jumbo frames.You're wrong here. The IXP switch platform cannot send ICMP Packet Too Big messages. That's why everybody must agree on one MTU.Isn't that the case for IXP's current/default MTU? If an IXP currently uses 1500, what effect will it have to its customers if it's increased to 9200 but not announced to them?none. everyone has agreed on 1500. it is near impossible to get close to everyone to agree on 9200 (or similar number) and implement it (at the same time or in a separate VLAN) (Nick argues, and i see the problem). The agreement and actions of the (various) operators of L3 devices connected at the IXP is what matters and seems not trivial. They are not under one control. Frank
Current thread:
- Re: Internet Exchanges supporting jumbo frames?, (continued)
- Re: Internet Exchanges supporting jumbo frames? Mikael Abrahamsson (Mar 09)
- Re: Internet Exchanges supporting jumbo frames? joel jaeggli (Mar 09)
- Re: Internet Exchanges supporting jumbo frames? Joel Maslak (Mar 10)
- Re: Internet Exchanges supporting jumbo frames? Mark Andrews (Mar 12)
- Re: Internet Exchanges supporting jumbo frames? Mikael Abrahamsson (Mar 09)
- Re: Internet Exchanges supporting jumbo frames? Kurt Kraut via NANOG (Mar 09)
- Re: Internet Exchanges supporting jumbo frames? Niels Bakker (Mar 09)
- Re: Internet Exchanges supporting jumbo frames? Tassos Chatzithomaoglou (Mar 09)
- Re: Internet Exchanges supporting jumbo frames? Frank Habicht (Mar 12)
- Re: Internet Exchanges supporting jumbo frames? Chris Woodfield (Mar 17)
- Re: Internet Exchanges supporting jumbo frames? Nikolay Shopik (Mar 17)
- Re: Internet Exchanges supporting jumbo frames? Baldur Norddahl (Mar 17)