05-06-2016 04:57 AM
Dear Ciscos,
Good Day...
i've noticed something wrong on a network i was assigned to tshoot.
the network is connected as follows using a wireless p2p .. all access switches are Cisco SG300-28 , top 2 cores are Cisco 3560
when issuing the "show mac address-table" command, i see mac address being copied to vlan 1 which may indicate a Layer 2 loop.
i've tried everything , STP works fine , switch no2 is the root on all other switches. but, problem still exists...
Thank for help
07-04-2016 10:55 AM
Greetings,
can you provide more information about this scenario? which mac address is duplicated? if there any loop?
07-04-2016 12:39 PM
thank you for your reply, as you may of noticed , this topology is loop free , it's not doing any Layer2 redundancy .. but one more thing to add , it's connected over Wireless, this is a small ISP topology, so from switch 3 down, it's all connected via "UBI-QUITY" wireless Links , thus all clients mac-address are found duplicated in all vlans, although they're supposed to be in clan 80 only...
this is my first time to witness such a thing ..
thank again
07-04-2016 03:01 PM
Thank for reply,
can you tell me on which switch does Wireless AP is plugged? can you attach some print shoot to see the duplicated mac address?
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