From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Fri Sep 13 2002 - 20:07:41 GMT-3
Now that the search engine work, please try it... there are some old
posts
regarding this. (One by myself :-)
Some comments:
DLSWv1 not equals DLSWv2 not equals DLSW+
Also, there is a quirck to be taken into account when using NAT in
between
two DLSWv2 (or DLSW+) peers because the one with the higher (or was it
lower ?)
IP tears down the write side. If NAT makes both ends believe they are
high end,
you get a flapping scenario ...
"Volkov, Dmitry (Toronto - BCE)" wrote:
>
> 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
> >
> > --------------------------------------------------------------
> > ----------
> >
> > MSN Photos is the easiest way to share and print your photos:
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-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
This archive was generated by hypermail 2.1.4 : Mon Oct 07 2002 - 07:43:51 GMT-3