On Thu, 10 Mar 2016, Tassos Chatzithomaoglou wrote:
Mikael Abrahamsson wrote on 10/3/16 18:21:
However, I stand by my earlier statement that we need to include MTU/MRU in ND
messages, so that this can be negotiated on a LAN where not all devices support
large MTU.
Isn't this already supported?
https://tools.ietf.org/html/rfc4861#section-4.6.4
That is in RAs, and pertains to a prefix. Also, if a device can't use the
advertised MTU, they will keep lower MTU which might be causing MTU
mismatch.
For instance, if I announce 9000 as MTU and a device is bridged via wifi,
wifi chips generally only supports around 2300 in MTU, so you'll have MTU
mismatch with MTU blackholing within the same L2 network. This is bad.
--
Mikael Abrahamsson email: swm...@swm.pp.se
