You must understand MAC addresses assignment if you perform one of the following actions:
Define static Address Resolution Protocol (ARP) entries for IP addresses in the switch
Use a network analyzer to decode network traffic
Each chassis is assigned a base number of MAC addresses with a number reserved for ports and other internal purposes, and the remainder assigned to routable VLANs. The following table identifies the numbers provided by product.
|
Product |
Base assignment |
Reserved |
Assigned to routable VLANs |
|---|---|---|---|
|
5320 Series |
1,024 |
First 256 |
remaining 768 |
|
5420 Series |
1,024 |
First 256 |
remaining 768 |
|
5520 Series |
1,024 |
First 256 |
remaining 768 |
| 5720 Series |
1,024 |
First 256 |
remaining 768 |
| 7520 Series |
1,024 |
First 256 |
remaining 768 |
| 7720 Series |
1,024 |
First 256 |
remaining 768 |
Virtual MAC addresses are the addresses assigned to VLANs. The system assigns a virtual MAC address to a VLAN when it creates the VLAN. The MAC address for a VLAN IP address is the virtual MAC address assigned to the VLAN.