From: Andrew Moriarty (amgroupstudy@hotmail.com)
Date: Fri Aug 05 2005 - 17:50:27 GMT-3
I reseached this topic on the list, and I couldn't find a solution. I had 60
switches I wanted to autoconfigure. I had the same problem last year, so
this time I put more time into it, and talked to cisco, and I got a
solution.
PROBLEM: If you try to use DHCP to map an IP address to the mac address of a
3550 switch, so that you can use autoconfigure to download a configuration,
it doesn't work. The reason: rather than using the mac address of the
switch, the client ID looks like this:
show ip dhcp bind
Bindings from all pools not associated with VRF:
IP address Client-ID/ Lease expiration Type
Hardware address/
User name
10.1.16.54 0100.0ded.24e4.1a Aug 04 2005 11:29 PM
Automatic
10.1.16.55 0100.0e38.6dd2.e5 Aug 05 2005 02:37 AM
Automatic
10.1.16.57 0100.0ded.23cf.a0 Aug 05 2005 11:20 AM
Automatic
10.1.16.58 0100.0ded.24e3.48 Aug 05 2005 11:19 AM
Automatic
10.1.16.60 0100.0e38.08ee.4e Aug 05 2005 11:17 AM
Automatic
10.1.16.61 0100.0dbc.d933.d2 Aug 05 2005 11:27 AM
Automatic
10.1.16.62 0100.12d9.84ba.f5 Aug 05 2005 03:18 AM
Automatic
10.1.16.63 0100.13c4.7289.20 Aug 05 2005 09:24 AM
Automatic
10.1.16.64 0100.1200.350e.ee Aug 05 2005 04:10 AM
Automatic
10.1.16.65 0100.0ded.24e3.e1 Aug 05 2005 10:41 AM
Automatic
10.1.16.66 0100.e075.24c0.85 Aug 05 2005 06:19 AM
Automatic
10.1.16.67 0100.127f.7c79.e0 Aug 05 2005 08:51 AM
Automatic
10.1.16.68 0063.6973.636f.2d30. Aug 04 2005 05:49 PM
Automatic
3031.342e.3661.3630.
2e32.6530.302d.566c.
31
10.1.16.69 0063.6973.636f.2d30. Aug 05 2005 06:09 AM
Automatic
3031.342e.3639.3737.
2e62.3338.302d.566c.
31
See the last two wierd ones? Those are the switches. But where do those
numbers come from? I had to ask cisco. The answer was that they are an ascii
representation of words and numbers combined together.
SOLUTION:
Here's the formula:
cisco-MAC address-Vl1
0063.6973.636f.2d30.3031.342e.3661.3630.2e32.6530.302d.566c.31
C I S C O - 0 0 1 4 . 6 A 6 0 . 2 E 0 0 - V
l 1
0063.6973.636f.2d30.3031.342e.3639.3737.2e62.3338.302d.566c.31
C I S C O - 0 0 1 4 . 6 9 7 7 . b 3 8 0 - V
l 1
So, as you can see from the above, the mac address of my switches were:
0014.6A60.2E00 and
0014.6977.B380
And since these are on the back of the switches, voila! Everything you need
to do autoconfigs with.
There you have it. Don't forget the . and - are represented as well.
am
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