[cisco-nas] Windows 10 with AS5400

[Aaron Leonard]

Joseph,

As a matter of course, I always just set adjust-mss to 1300 (or whatever 
my fancy is that day) on all edge routers, i.e. the routers that are 
clients' first-hop gateways.

You might not want to set it on your more core routers, because this 
could impact performance.  (On the other hand, it might benefit 
performance, if it allows you to avoid doing fragmentation [and even 
worse, reassembly, if your routers are tunnel endpoints that do that 
sort of thing.])

Now, if you *only* see this problem on your dialup clients, then I 
suppose you could be conservative and set it only on your 5400s.  But I 
can tell you that I absolutely see this problem affecting Windows 10 
Creators Update clients in other topologies (e.g. Wi-Fi, which is my 
bailiwick nowadays.)

Best regards,

Aaron

------------------------------------------------------------------------

On 6/8/2017 2:46 PM, mays at win.net (Joseph Mays) wrote:
> I meant to say they are all cisco routers.
> *From:* Joseph Mays
> *Sent:* Thursday, June 08, 2017 3:46 PM
> *To:* cisco-nas at puck.nether.net
> *Subject:* Re: [cisco-nas] Windows 10 with AS5400
> Thanks for the response! Trying all the client-side suggestions. WRT 
> this, though...
>
>   * on the infrastructure side, if a router in the affected network
>     path is a Cisco IOS router, then turn on TCP MSS Adjust (set it to
>     1250 or 1360 or so.)
>
> All the routers in the network path on our system are network routers. 
> Are you suggesting I turn this on for all of them, or just on the 
> AS5400 that answers the dialup connection?
>
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