Static MAC 3750X with no configuration

[Rick Morris]

Interesting issue.

In reading the following doc

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/15.0_1_se/configuration/guide/swadmin.html#wp1063713

I understand the difference between dynamic and static mac, however, when looking at the switch mac table I see the following:

  72    0011.0aea.ae0f    STATIC      Gi2/0/48

  72    0011.25a3.adb8    STATIC      Gi2/0/46

  72    001a.1ecd.370e    STATIC      Gi2/0/18

  72    001a.a0db.e629    STATIC      Gi2/0/8

  72    001e.4f4a.7c71    STATIC      Gi2/0/47

  72    0022.1933.4101    STATIC      Gi2/0/45

What causes these to be static mac entries when these were not manually configured?  If I move a machine from one interface to another the mac will follow and will again be seen as static?

[Jan Rolny]

Hi Rick,

static MAC addresses are addresses which are configured on switch for port security.

Dynamic MAC addresses are learned when frame arrives on switch.

So probably port-security is applied on switch.

Best regards,

Jan