From: Snow, Tim (timothy.snow@eds.com)
Date: Tue Jul 15 2003 - 00:49:24 GMT-3
I just labbed up the same scenario as you (basically)
r8---r9
r8 is advertising 0200.4556.1140 via the "dlsw icanreach mac-add
0200.4556.1140"
r9#sh dlsw reac
DLSw Local MAC address reachability cache list
Mac Addr status Loc. port rif
DLSw Remote MAC address reachability cache list
Mac Addr status Loc. peer
0200.4556.1140 UNCONFIRM REMOTE 98.98.98.8(2065)
The previos was seen on r9. If a host wants to communicate with the mac
0200.4556.1140, won't the local dlsw router know to use the DLSW peer at
98.98.98.8 to get to this MAC. Why does it need to be bit swapped? I
thought when you advertise reachability, the only time you need to do the
bitswap is when your going between TR and Ethernet. In either case, if the
remote peer learns the MAC, why would it have to bitswap either way if it
knows it wants to communicate with 0200.4556.1140?
Tim
-----Original Message-----
From: Jonathan V Hays [mailto:jhays@jtan.com]
Sent: Monday, July 14, 2003 9:33 PM
To: 'Biondino, Joseph'
Cc: ccielab@groupstudy.com
Subject: RE: Ethernet-to-Ethernet DLSW ICANREACH
http://www.cisco.com/warp/public/697/dlswts8.html
"Remember that entries in show dlsw reach appear in non-canonical format
..."
So let's try an experiment:
-----
r1#sh run | include dlsw icanreach
dlsw icanreach mac-address 00e0.b05a.e74d mask ffff.ffff.ffff
r1#
r2#sh dlsw reachability
DLSw Local MAC address reachability cache list
Mac Addr status Loc. port rif
DLSw Remote MAC address reachability cache list
Mac Addr status Loc. peer
00e0.b05a.e74d UNCONFIRM REMOTE 10.1.1.1(2065)
DLSw Local NetBIOS Name reachability cache list
NetBIOS Name status Loc. port rif
DLSw Remote NetBIOS Name reachability cache list
NetBIOS Name status Loc. peer
r2#
-----
Note that the "sh dlsw reachability" output is displaying what it thinks
is a non-canonical address. This mac address is exactly the same as the
one I configured on r1. IOS did *not* do any conversion. From this we
have to conclude the engineer must do the conversion, if necessary.
If the mac address is from a token ring interface, no conversion is
necessary.
If the mac address is from an ethernet interface (canonical) then you
must convert it to non-canonical format prior to using it in a DLSW
filter.
HTH,
Jonathan
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of Biondino, Joseph
> Sent: Monday, July 14, 2003 7:50 PM
> To: Richard L. Pickard
> Cc: ccielab@groupstudy.com
> Subject: RE: Ethernet-to-Ethernet DLSW ICANREACH
>
>
> I have had some conflicting answers regarding this question,
> does anybody
> know the answer for sure??
>
> Kind regards,
>
> Joseph Biondino
> Network Specialist
> UNISYS
> Network Command Centre
>
> 115 - 117 Wicks Rd
> North Ryde NSW 2113
> Phone: 02 9857 3149
> Group: 02 9390 1107
> Fax: 02 9857 3122
>
> -----Original Message-----
> From: Richard L. Pickard [mailto:nettable_walker@comcast.net]
> Sent: Monday, 14 July 2003 2:12 PM
> To: Biondino, Joseph
> Subject: RE: Ethernet-to-Ethernet DLSW ICANREACH
>
> If it's ethernet to ethernet cisco's own example does not
> show the bit
> swap.
>
> Richard
>
> //
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Biondino, Joseph
> Sent: Sunday, July 13, 2003 6:19 PM
> To: ccielab@groupstudy.com
> Subject: Ethernet-to-Ethernet DLSW ICANREACH
>
>
> Hi;
>
> I was asked to configure an Ethernet LAN to Ethernet LAN SNA
> connection with
> DLSW running over a Frame Relay WAN yesterday. One of the
> requirements was
> to get one router to announce in the capabilities exchange
> that it can reach
> a specified MAC address. (1111.2222.3333)
>
> I configured the following:
>
> Dlsw icanreach 1111.2222.3333
>
> I then had a thought that I needed to bit swap as the host
> was Ethernet
> connected. Can somebody please advise on whether the bit swap
> is required in
> the dlsw icanreach command for Ethernet connected devices??
>
> Kind regards,
>
> Joseph Biondino
> Network Specialist
> UNISYS
> Network Command Centre
>
> 115 - 117 Wicks Rd
> North Ryde NSW 2113
> Phone: 02 9857 3149
> Group: 02 9390 1107
> Fax: 02 9857 3122
>
>
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