RE: DLSw reachability; Ethernet MAC addresses

That is because the MAC's are transposed. You need to convert from
non-canonical to canonical.

Here is an old archive that shows how to do this process.

http://www.mail-archive.com/cisco@groupstudy.com/msg11230.html

Regards,
 
Tyson Scott - CCIE #13513 R&S, Security, and SP
Technical Instructor - IPexpert, Inc.
Mailto: tscott_at_ipexpert.com
Telephone: +1.810.326.1444, ext. 208
Live Assistance, Please visit: www.ipexpert.com/chat
eFax: +1.810.454.0130

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Dale
Shaw
Sent: Wednesday, February 10, 2010 7:58 PM
To: Cisco certification
Subject: OT: DLSw reachability; Ethernet MAC addresses

Hi all,

This one's for the old guys on list who know how DLSw works. Hey, old
guys, stop stroking your grey beards and thinking about old times, put
down the ol' pipe and put on your favourite plaid cardigan and
slippers, I need your help.

We have a DLSw configuration that provides connectivity between
SNA-speaking devices over a WAN. The devices using the DLSw circuit
are connected via Ethernet at each site (no Token Ring).

I'm just trying to figure out exactly where the devices at each end
plug into our layer 2 network (i.e. which switchport). The 'show dlsw
reachability' command gives me output like so:

switch#sh dlsw reachability
DLSw Local MAC address reachability cache list
Mac Addr status Loc. port rif
0010.25ed.2600 FOUND LOCAL TBridge-007 --no rif--
0040.cd05.1f73 FOUND LOCAL TBridge-007 --no rif--
00b0.0698.5d6a FOUND LOCAL TBridge-007 --no rif--
00b0.0698.5dea FOUND LOCAL TBridge-007 --no rif--
00b0.0698.7d2e FOUND LOCAL TBridge-007 --no rif--
[...]

The thing is, I can't trace those MACs using the usual "show
mac-address-table address .." method.

switch#sh mac-address-table address 00b0.0698.5d6a
Legend: * - primary entry
        age - seconds since last seen
        n/a - not available

  vlan mac address type learn age ports
------+----------------+--------+-----+----------+--------------------------
No entries present.

The DLSw config is pretty simple:

interface Loopback0
 ip address 10.0.0.1 255.255.255.255
!
dlsw local-peer peer-id 10.0.0.1
dlsw remote-peer 0 tcp 10.0.0.200
dlsw bridge-group 7
!
interface Vlan6
 ip address 192.168.108.1 255.255.255.0
 bridge-group 7
 bridge-group 7 spanning-disabled
!
interface Vlan60
 ip address 192.168.109.1 255.255.255.0
 bridge-group 7
 bridge-group 7 spanning-disabled
!
end

Why is it so? How can I find the endpoints using the DLSw circuit?

Cheers,
Dale

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Received on Wed Feb 10 2010 - 20:21:35 ART