From: Volkov, Dmitry (Toronto - BCE) (dmitry_volkov@ca.ml.com)
Date: Fri Sep 13 2002 - 17:49:23 GMT-3
2065 - read, 2067 write port
http://www.faqs.org/rfcs/rfc2166.html
Each Data Link Switch will maintain a list of DLSw capable routers
and their status (active/inactive). Before Data Link Switching can
occur between two routers, they must establish two TCP connections
between them. These connections are treated as half duplex data
pipes. A Data Link Switch will listen for incoming connections on
its Read Port (2065), and initiate outgoing connections on its
Write Port (2067). Each Switch is responsible for initiating one
of the two TCP connections. After the TCP connections are
established, SSP messages are exchanged to establish the
capabilities of the two Data Link Switches. Once the exchange is
complete, the DLSw will employ SSP control messages to establish
end-to-end circuits over the transport connection. Within the
transport connection, DLSw SSP messages are exchanged. The
message formats and types for these SSP messages are documented in
the following sections.
> -----Original Message-----
> From: Scott Morris [mailto:swm@emanon.com]
> Sent: Friday, September 13, 2002 4:31 PM
> To: 'warren perrett'; ccielab@groupstudy.com
> Subject: RE: DLSW port 2067
>
>
> 2067 is a READ port while 2065 is the WRITE port. So my local 2065
> talks to your local 2067 and visa-versa.
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of
> warren perrett
> Sent: Friday, September 13, 2002 3:56 PM
> To: ccielab@groupstudy.com
> Subject: DLSW port 2067
>
>
> Does anybody know what TCP port 2067 does in relation to DLSW. I have
> read and re - read my SNA notes and I cannot see any reference to this
> port . I know it has some part in DLSW ,if you issue a show
> ip socket on
> a router running DLSW you will see an open socket for 2067.
> see below
>
> fred#sh ip sock
>
> Proto Remote Port Local Port In Out Stat TTY OutputIF
>
> 17 0.0.0.0 0 133.13.2.2 67 0 0 1 0
>
> 88 0.0.0.0 0 133.13.2.2 13 0 0 0 0
>
> 17 0.0.0.0 123 133.13.2.2 123 0 0 1 0
>
> 17 255.255.255.255 0 133.13.2.2 2067 0 0 1 0
>
> rack13r2#
>
> Does any one actually know ? Thanks in advance
>
> --------------------------------------------------------------
> ----------
>
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