This page serves as a refererence guide for special addresses used in networking.
MAC Addresses
| Pattern | Purpose | Usage |
|---|---|---|
| 00:00:0C:07:AC:[XX] | HSRP v1 IPv4 | Last two nibbles are the HSRP group |
| 00:00:0C:9F:F[X:XX] | HSRP v2 IPv4 | Last three nibbles are the HSRP Group |
| 00:05:73:A0:0[X:XX] | HSRP v2 IPv6 | Last three nibbles are the HSRP Group |
| 00:00:5E:00:01:[XX] | VRRP IPv4 | Last two nibbles are the Virtual Router ID |
| 00:00:5E:00:02:[XX] | VRRP IPv6 | Last two nibbles are the Virtual Router ID |
| 00:07:B4:00:[XX]:[YY] | GLBP | Last octet is GLBP group [XX] followed by the AVF number [YY] |
| 00:23:04:EE:BE:[XX] | VPC System-mac | Last two nibbles is the VPC Domain ID |
| 01:80:C2:00:00:00 | STP BPDU | Destination MAC for BPDUs |
| 01:00:0C:CC:CC:CD | Cisco PVSTP BPDU | Destination MAC for BPDUs |
| 01:80:C2:00:00:02 | IEEE Std 802.3 Slow Protocols multicast address | Used for LACP etc |
| 01:00:0C:CC:CC:CC | Multicast MAC for Cisco services | Used for PAgP/CDP/VTP |
