Cisco Switch 3750 POe went bad, not giving power to the VOiP Phones.

Here was what I did in summary to fix the issue.

 

1.       Pinged Site BB from Site PK was successful.

2.       Went to Site BB to look at the switch, a lot of ports has no light to them.

3.       In cisco switch, within the bad interface did a “Shut” command(gave me a power failure error, I forgot what it said exactly) then a “no shut”  (nothing happened and was at Administrative Down”

4.       Restarted the cisco switch “connected via USB Console”

    
      5. Ran into a looping error messages that I couldn’t get out of (The only happens when VoIP Phones are plugged into the Cisco 3750 POe switch)

6.       Called Cisco to get a replacement switch (arrived at 4 hours later)

7.       In the old switch I was able to Telnet in so I ran the “Show power inline” command it tells you which ports are bad, apparently all ports got bad for some reason after switch rebooted & having the VoIP phone plugged into the switch port (only 6 cisco phones were plugged).

 

8.      

8.       Switch arrived then  loaded the configuration from the old switch (used TFTP to saved the backup of old switch config), now it’s  working.