On (2014-02-24 12:47 +0200), Mark Tinka wrote: > TCP MSS adjustments generally affect traffic terminating on > the switch itself. > > Transit packets are affected by interface MTU. > > If you're able to affect TCP MSS of transit traffic, I > certainly haven't yet heard about it (which is not to say it > doesn't exist).
I think you're mixing system level setting and interface level setting. When configured in interface it indeed mangles transit packets. When in system level it affects local when interface it affects transit. IIRC JunOS does not support interface-level 'stateless' mangling, but will only do it in FW via flows. It's typically used to make tunneling optimal, instead of forcing TCP packet to always be split into one large and one tiny packet over tunnel, you curb MSS to maximum possible with tunnel over-head, essentially halving your PPS and improving BPS due to less overhead. There is no particular reason why Trio couldn't do this statelessly in interface level. But I don't think EX has hardware smart enough to do this. -- ++ytti _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
