If you are concerned about cross cabling, doing a show cdp ne is actually a quick way of checking (you'll see your own switch in the output)
Cheers, Donald Robb Productive Networks / Network Consultant CCIE Written, CCIP, CCSP, CCDP, CCNP: R&S/Security, CCNA: DC/Voice, JNCIP, SCP, MCSA 2012, VCA-DCV, CCA: XenApp 6, Security+, CCSE.R65, PACE -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Scott Sierra Sent: July 4, 2014 6:42 AM To: [email protected] Subject: [OSL | CCIE_RS] 6500 mac address-table Output Hi everyone, Sorry this question is not study related but I am hoping someone here has come across this as I have not and its really confused. Have a few 6500's dotted around the company connected via L2 trunks with SVI transit vlans forming the OSPF adjacencies. When I do a show mac address-table on some of the 6500's I am getting the following. Legend: * - primary entry age - seconds since last seen n/a - not available S - secure entry R - router's gateway mac address entry D - Duplicate mac address entry Displaying entries from active supervisor: vlan mac address type learn age ports ----+----+---------------+-------+-----+----------+--------------------- ----+----+---------------+-------+-----+----------+-------- * 1213 0050.5792.271a dynamic Yes 25 Po20 Gi1/7,Gi2/2,Gi2/3,Gi2/5 Gi2/6,Gi2/8,Gi2/9,Gi5/1 Gi5/3,Te5/4,Te5/5,Gi6/1 Gi6/2,Te6/4,Te6/5,Po12,Po16 Po20,Router,Switch,Stby-Switch Gi1/7,Gi2/2,Gi2/3,Gi2/5 Gi2/6,Gi2/8,Gi2/9,Gi5/1 Gi5/3,Te5/4,Te5/5,Gi6/1 Gi6/2,Te6/4,Te6/5,Po12,Po16 Po20,Router,Switch,Stby-Switch Gi1/7,Gi2/2,Gi2/3,Gi2/5 Gi2/6,Gi2/8,Gi2/9,Gi5/1 Gi5/3,Te5/4,Te5/5,Gi6/1 Gi6/2,Te6/4,Te6/5,Po12,Po16 Po20,Router,Switch,Stby-Switch Gi1/7,Gi2/2,Gi2/3,Gi2/5 Gi2/6,Gi2/8,Gi2/9,Gi5/1 Gi5/3,Te5/4,Te5/5,Gi6/1 Gi6/2,Te6/4,Te6/5,Po12,Po16 Po20,Router,Switch,Stby-Switch Gi1/7,Gi2/2,Gi2/3,Gi2/5 Gi2/6,Gi2/8,Gi2/9,Gi5/1 Gi5/3,Te5/4,Te5/5,Gi6/1 Gi6/2,Te6/4,Te6/5,Po12,Po16 Po20,Router,Switch,Stby-Switch this does not happen on all the vlans and also they dont all exist on the same core. The above ports are adjacent switches also connected via OSPF. If the entry was static I would not worry so much but its dynamic and with multiple entries. Am I looking at a bug or some kind of Loop if so why not all the vlans or at least the ones specific to the same sections of the network as the ones i am getting this output on. Seriously been bugging me. Hope someone can put my mind at ease and point out something silly that I am missing here. Regards, Scott _______________________________________________ Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: iPexpert on YouTube: www.youtube.com/ipexpertinc _______________________________________________ Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: iPexpert on YouTube: www.youtube.com/ipexpertinc
