Reference: Special addresses

This page serves as a refererence guide for special addresses used in networking.

MAC Addresses

PatternPurposeUsage
00:00:0C:07:AC:[XX]HSRP v1 IPv4Last two nibbles are the HSRP group
00:00:0C:9F:F[X:XX]HSRP v2 IPv4Last three nibbles are the HSRP Group
00:05:73:A0:0[X:XX]HSRP v2 IPv6Last three nibbles are the HSRP Group
00:00:5E:00:01:[XX]VRRP IPv4Last two nibbles are the Virtual Router ID
00:00:5E:00:02:[XX]VRRP IPv6Last two nibbles are the Virtual Router ID
00:07:B4:00:[XX]:[YY]GLBPLast octet is GLBP group [XX] followed by the AVF number [YY]
00:23:04:EE:BE:[XX]VPC System-macLast two nibbles is the VPC Domain ID
01:80:C2:00:00:00STP BPDUDestination MAC for BPDUs
01:00:0C:CC:CC:CDCisco PVSTP BPDUDestination MAC for BPDUs
01:80:C2:00:00:02IEEE Std 802.3 Slow Protocols multicast addressUsed for LACP etc
01:00:0C:CC:CC:CCMulticast MAC for Cisco servicesUsed for PAgP/CDP/VTP

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