[j-nsp] GRE on MX - weird performance issue

[叶雨飞]

Sounds like a MSS issue have you tried this?

http://kb.juniper.net/InfoCenter/index?page=content&id=KB24352&cat=MX_SERIES&actp=LIST

On Mon, Dec 17, 2012 at 7:57 PM, Luca Salvatore <Luca at ninefold.com> wrote:
> Hi All,
>
> I have a MX5 and a MX10 router connected over the Internet via a GRE tunnel.  When I do a file transfer between the two sites that these routers connect it looks like there is some form of rate-limiting going on.  My transfer speed flat lines at about 300KB.
>
> However I know it is not a bandwidth issue because I can have multiple file transfers going on at once and they all sit at about 300KB.  So this shows me that I have enough bandwidth to push lots of traffic at once, but each single stream of traffic never gets much faster than 300KB.
>
> I've tried different MTU settings on the GRE interface without much change, was thinking of adjusting the MSS but can't seem to figure that out on the MX.
>
> Any thoughts here?  I don't have any form for shaping/policing/rate limiting anywhere, and it seems strange that I can push lots of data slowly, but I can't have one transfer going fast!
> Seems like there is some type of 'per session' rate limiting going on but it's not me!
>
> Thanks as always.
> Luca
>
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