* TCP Congestion Control Algorithms
[not found] <a45e9b40908311408l15d68088i459d6a1000cbca07@mail.gmail.com>
@ 2009-08-31 21:10 ` Lisong Xu
2009-08-31 22:07 ` Stephen Hemminger
0 siblings, 1 reply; 3+ messages in thread
From: Lisong Xu @ 2009-08-31 21:10 UTC (permalink / raw)
To: netdev
Hello,
Since there are multiple different TCP congestion control algorithms
available in Linux, a Linux server may use any of them.
Is it possible for a regular user to find out the exact TCP congestion
control algorithm used by a Linux server? For example, if I am
downloading a file from a remote Linux server using a TCP flow, can I
find out whether this flow is a TCP/CUBIC flow, or TCP/Newreno, or
some other TCP protocol?
Thanks! If I send this email to a wrong mailing list, I am sorry for that.
Lisong
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: TCP Congestion Control Algorithms
2009-08-31 21:10 ` TCP Congestion Control Algorithms Lisong Xu
@ 2009-08-31 22:07 ` Stephen Hemminger
2009-09-01 0:37 ` Lisong Xu
0 siblings, 1 reply; 3+ messages in thread
From: Stephen Hemminger @ 2009-08-31 22:07 UTC (permalink / raw)
To: Lisong Xu; +Cc: netdev
On Mon, 31 Aug 2009 16:10:59 -0500
Lisong Xu <lisongxu2@gmail.com> wrote:
> Hello,
>
> Since there are multiple different TCP congestion control algorithms
> available in Linux, a Linux server may use any of them.
>
> Is it possible for a regular user to find out the exact TCP congestion
> control algorithm used by a Linux server? For example, if I am
> downloading a file from a remote Linux server using a TCP flow, can I
> find out whether this flow is a TCP/CUBIC flow, or TCP/Newreno, or
> some other TCP protocol?
>
No. you might be able to some nmap style guessing, but no remote
API. You can see locally on the server through /proc/sys/net
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: TCP Congestion Control Algorithms
2009-08-31 22:07 ` Stephen Hemminger
@ 2009-09-01 0:37 ` Lisong Xu
0 siblings, 0 replies; 3+ messages in thread
From: Lisong Xu @ 2009-09-01 0:37 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: netdev
Thanks, Stephen!
Lisong
On Mon, Aug 31, 2009 at 5:07 PM, Stephen Hemminger<shemminger@vyatta.com> wrote:
> On Mon, 31 Aug 2009 16:10:59 -0500
> Lisong Xu <lisongxu2@gmail.com> wrote:
>
>> Hello,
>>
>> Since there are multiple different TCP congestion control algorithms
>> available in Linux, a Linux server may use any of them.
>>
>> Is it possible for a regular user to find out the exact TCP congestion
>> control algorithm used by a Linux server? For example, if I am
>> downloading a file from a remote Linux server using a TCP flow, can I
>> find out whether this flow is a TCP/CUBIC flow, or TCP/Newreno, or
>> some other TCP protocol?
>>
>
> No. you might be able to some nmap style guessing, but no remote
> API. You can see locally on the server through /proc/sys/net
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <a45e9b40908311408l15d68088i459d6a1000cbca07@mail.gmail.com>
2009-08-31 21:10 ` TCP Congestion Control Algorithms Lisong Xu
2009-08-31 22:07 ` Stephen Hemminger
2009-09-01 0:37 ` Lisong Xu
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