From: Volkov, Dmitry (Toronto - BCE) (dmitry_volkov@ca.ml.com)
Date: Fri Sep 13 2002 - 20:37:09 GMT-3
Carlos,
What do You think about access-list bellow for defining all dlsw flavours
whe we talk about
queuing list ?
queue-list 1 protocol ip 1 list 100
access-list 100 permit tcp any eq 2067 any
access-list 100 permit tcp any any eq 2067
access-list 100 permit udp any eq 2067 any
access-list 100 permit udp any any eq 2067
access-list 100 permit tcp any eq 2065 any
access-list 100 permit tcp any any eq 2065
access-list 100 permit tcp any eq 1981 any
access-list 100 permit tcp any any eq 1981
access-list 100 permit tcp any eq 1982 any
access-list 100 permit tcp any any eq 1982
access-list 100 permit tcp any eq 1983 any
access-list 100 permit tcp any any eq 1983
Thanks,
Dmitry
> -----Original Message-----
> From: Carlos G Mendioroz [mailto:tron@huapi.ba.ar]
> Sent: Friday, September 13, 2002 7:08 PM
> To: Volkov, Dmitry (Toronto - BCE)
> Cc: 'Scott Morris'; 'warren perrett'; ccielab@groupstudy.com
> Subject: Re: DLSW port 2067
>
>
> 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
> > >
> > > --------------------------------------------------------------
> > > ----------
> > >
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>
> --
> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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