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Most likely what you are looking to end up with is something that (to my knowledge) is not an option for syslog/traps. If I understand your question right you want to basically what JB has posted except instead of FastEthernet0/20 you also want addit...
Dali,Are you looking to collect the Designated Root & Bridge ID MAC ADDR from all of your switches? Or are you looking to capture the MACs that each switch sees, regardless if it is the MAC choosen as DR or BDR?