Common MAC Addresses

Hint: CDP and PVST+ share the same first 2 octets. LLDP and Standard STP share the same first 2 octets as well.

Reminder: The group numbers in FHRP are hexadecimal numbers.

Layer 2 Discovery Protocols

• CDP: 0100.0ccc.cccc
• LLDP: 0180.c200.000e

Spanning Tree Protocols (STP)

• PVST+ BPDU: 0100.0ccc.cccd
• Standard STP BPDU: 0180.c200.0000

First Hop Redundancy Protocols (FHRP)

• Hot Standby Router Protocol V1 (HSRPv1):
  • 0000.0c07.acXX
  • (XX = HSRP group number)
• Hot Standby Router Protocol V2 (HSRPv2):
  • 0000.0c9f.fXXX
  • (XXX = HSRP group number)
• Virtual Router Redundancy Protocol (VRRP):
  • 0000.5e00.01XX
  • (XX = VRRP group number)
• Gateway Load Balancing Protocol (GLBP):
  • 0007.b400.XXYY
  • (XX = GLBP group number, YY = Active Virtual Forwarder [AVF] number)