[c-nsp] Improve VPN performance by reducing MTU via DHCP?

[Sridhar Ayengar]

Rodney Dunn wrote:
> True. The only drawback of that is that only applies to TCP so
> your udp still has the issue.
> 
> Personally, if I were designing it and had a way to force
> all my workstations down I would strongly consider it if their
> main data transport is over some form of tunneled infrastructure.

Of course, that would be optimal, and he did mention that the 
connections were VPNs.  That would lend itself to something like what 
you suggest fairly easily.

Peace...  Sridhar

> The performance loss by not being able to send the extra 20 bytes
> per frame on a local LAN would probably never be noticed.
> 
> Rodney
> 
> 
> 
> On Thu, Jun 07, 2007 at 11:05:00AM -0400, Sridhar Ayengar wrote:
>> Vincent De Keyzer wrote:
>>> Does that sound good to you? Anybody ever tried this? Can you think of any
>>> side effect of changing the MTU of all PCs?
>> A lot of people have to do something similar when using PPPoE, which 
>> uses an MTU of 1492.
>>
>> You also have the option of activating MSS-Clamping on the Cisco.  That 
>> way, you don't have to go around changing the MTU on all of your devices.