From: Joe (groupstudy@comcast.net)
Date: Tue Jan 07 2003 - 00:22:28 GMT-3
Having NOT seen this lab, it looks like they 'tried' to bitswap the MAC
address since it is on Ethernet but I come up with 0080.8888.8888 when I
bit swapp it. The mask should be obvious but remember that is is the
opposite of a wildcard mask, i.e. where there's a 1 it means a direct
match for the MAC filter. I disagree with the MAC address though. If
you reverse their MAC address and bitswap it back, you get
0001.aaaa.aaaa, not 0001.1111.1111.
Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jason Cash
Sent: Monday, January 06, 2003 9:35 PM
To: ccielab@groupstudy.com
Subject: MAC Address and subnet masks...
I am having trouble understanding MAC address filters. Working on a
Boson lab (6.4) and it instructs one to:
Configure a static definition pointing to R as the DSLSW peer to reach
an Eth. Attached device with MAC 0001.1111.1111
The answer is such:
Dlsw icanreach mac-address 0080.5555.5555 mask ffff.ffff.ffff
How did they get this mac address? Also is there a link available that
will demystify the MAC address ACLs and subnet masks? .
.
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