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RE: LVS and H.323

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: LVS and H.323
From: "kostas anagnopoulos" <kostas.anagnopoulos@xxxxxxxxxxxx>
Date: Sat, 29 Apr 2006 20:48:40 +0300
h323 has two modes of operation slow-start and fast start.
In slow-start mode it uses one tcp session on port 1720 a
second tcp session in the range 1024 to 65535 and a tcp session
in the range 16384 to 32764
In fast-start mode only the first tcp session on port 1720 and the udp
session is needed
If you manage to group slow-start's sessions fast-start will also work

this is an example tcp/udp trace from a client x.x.x.241 to a real server
x.x.x.242

1st tcp session on port 1720
TCP: Random local port generated 65380
TCP: sending SYN, seq 1459390984, ack 0
TCP0: Connection to x.x.x.242:1720, advertising MSS 1460
TCP0: state was CLOSED -> SYNSENT [65380 -> x.x.x.242(1720)]
TCP0: state was SYNSENT -> ESTAB [65380 -> x.x.x.242(1720)]

2nd tcp session on a dynamic port range
TCP: Random local port generated 21716
TCP: sending SYN, seq 1988082493, ack 0
TCP0: Connection to x.x.x.242:28380, advertising MSS 1460
TCP0: state was CLOSED -> SYNSENT [21716 -> x.x.x.242(28380)]
TCP0: state was SYNSENT -> ESTAB [21716 -> x.x.x.242(28380)]

and the udp session
voip_rtcp_create_session: callID=11, dstCallID=-1 localaddr=x.x.x.241,
localport=17404,remoteaddr=x.x.x.242, remoteport=19006, type=2, sig_tos=3,
ip_tos=5

thanks
Kostas

-----Original Message-----
From: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx
[mailto:lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Joseph Mack
NA3T
Sent: Saturday, April 29, 2006 3:13 PM
To: LinuxVirtualServer.org users mailing list.
Subject: RE: LVS and H.323


On Fri, 28 Apr 2006, kostas anagnopoulos wrote:

> have tryied that but the application didn't work. Strange
> because the application works pretty much like windows
> media player as described in
>
http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.services.multi-port.h
tml#streaming_media

it would be nice to find out the differences. Do you have a
list of ports/proto and whether they're listening or
callbacks?

Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

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