* [LARTC] OT: Latency issues with Satellite connections
@ 2002-09-30 9:07 Jaco van der Schyff
2002-09-30 9:15 ` Alexey Talikov
2002-09-30 9:23 ` John Bäckstrand
0 siblings, 2 replies; 3+ messages in thread
From: Jaco van der Schyff @ 2002-09-30 9:07 UTC (permalink / raw)
To: lartc
Hi Everyone,
Sorry for this OT post, but I wonder if there is someone out there
who can answer this question for me.
We are currently investigating the option of using VSAT Satellite
connections for some of our sites in remote areas of Africa. VSAT
has been critisized with regards to latency, and according to the
supplier, its about 560ms per satellite hop.
My question is the following:
Would this be 560ms both ways, for each packet sent/received?
Would it be 560ms for a packet to be received, then 560ms AGAIN
for the corresponding ACK to be sent? If this is the case,
even a fast 2Mb line would seem really slow.
Or am a reasoning at the wrong end?
Any ideas/input would be appreciated.
- Jaco
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* Re: [LARTC] OT: Latency issues with Satellite connections
2002-09-30 9:07 [LARTC] OT: Latency issues with Satellite connections Jaco van der Schyff
@ 2002-09-30 9:15 ` Alexey Talikov
2002-09-30 9:23 ` John Bäckstrand
1 sibling, 0 replies; 3+ messages in thread
From: Alexey Talikov @ 2002-09-30 9:15 UTC (permalink / raw)
To: lartc
Hello Jaco,
Monday, September 30, 2002, 2:07:46 PM, you wrote:
JvdS> Would this be 560ms both ways, for each packet sent/received?
JvdS> Would it be 560ms for a packet to be received, then 560ms AGAIN
JvdS> for the corresponding ACK to be sent? If this is the case,
JvdS> even a fast 2Mb line would seem really slow.
Not so good for interactive connection such as telnet ssh and for
interactive browsing. But 2mbit always 2mbit.
-----------------------------------
mailto:alexey_talikov@texlab.com.uz
BR
Alexey Talikov
FORTEK
-----------------------------------
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* Re: [LARTC] OT: Latency issues with Satellite connections
2002-09-30 9:07 [LARTC] OT: Latency issues with Satellite connections Jaco van der Schyff
2002-09-30 9:15 ` Alexey Talikov
@ 2002-09-30 9:23 ` John Bäckstrand
1 sibling, 0 replies; 3+ messages in thread
From: John Bäckstrand @ 2002-09-30 9:23 UTC (permalink / raw)
To: lartc
> Any ideas/input would be appreciated.
Tcp transfers should work out ok of you compensate by
setting large/huge windows, though interactive work
will probably not be that fun. Slashdot had a story
about a satellite connection, and the page regarding
that says their "ping-time" was around 650ms, I guess
thats round-trip then?
---
John Bäckstrand
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2002-09-30 9:07 [LARTC] OT: Latency issues with Satellite connections Jaco van der Schyff
2002-09-30 9:15 ` Alexey Talikov
2002-09-30 9:23 ` John Bäckstrand
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