How much use is IPTOS_LOWDELAY
David Holder
david.holder at erion.co.uk
Mon Jan 4 11:21:49 UTC 2016
Hi Richard,
Happy New Year!
I didn't see you get a response to this one so here are my thoughts.
IPTOS_LOWDELAY is historic. It refers to a time prior to Differentiated
Services (DiffServ) when the Type of Service field in the IP header had
bit flags indicating the quality of service required.
Today, with the advent of DiffServ, the Differentiated Services Code
Point (DSCP) value for the required level of service should be set
instead. The appropriate value will vary from network to network
depending on the network's QoS policy.
See RFC 2474 for DiffServ.
To set the DSCP field use the the IP_TOS socket option in legacy IPv4
(if you are still using v4) or the IPV6_TCLASS socket option in IPv6.
Hope that helps!
Best Regards,
David
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Dr David Holder CEng FIET MIEEE
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On 27/12/2015 19:02, Richard Sharpe wrote:
> Hi folks,
>
> I see a lot of noise out there on the internet about using
> IPTOS_LOWDELAY with Samba.
>
> Is there any data on how useful this is in terms of performance improvements?
>
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