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Licensing Requirements and Limitations for MAC Address Tables
Involved Network Elements
Other network elements are not required.
Licensing Requirements
The MAC address table is a basic feature of a switch and is not under license control.
Version Requirements
Table 2-6 Products and versions supporting MAC
Product |
Product Model |
Software Version |
|---|---|---|
S12700 |
S12708, S12712 |
V200R005C00, V200R006C00, V200R007C00, V200R007C20, V200R008C00, V200R009C00, V200R010C00, V200R011C10 |
S12710 |
V200R010C00, V200R011C10 |
|
S12704 |
V200R008C00, V200R009C00, V200R010C00, V200R011C10 |
Feature Limitations
- Dynamic MAC address entries can be learned on an interface only after the interface is added to an existing VLAN.
Among existing MAC address entries, only MAC addresses of the dynamic type can be overwritten as MAC addresses of other types.
- Each static MAC address entry can have only one outbound interface.
- When the aging time of dynamic MAC address entries is set to 0, dynamic MAC address entries do not age. To age MAC address entries, delete the aging time configuration.
- When MAC address learning is disabled in a VLAN and an interface in the VLAN (excluding X series cards) and the discard action is configured for the interface, the interface does not discard packets from this VLAN. For example, MAC address learning is disabled in VLAN 2 but enabled in VLAN 3; Port1 in VLAN 2 and VLAN 3 has MAC address learning disabled and the discard action is defined. In this situation, Port1 discards packets from VLAN 3 but forwards packets from VLAN 2.
- When the interface frequently alternates between Up and Down, MAC address entries may be not aged within two aging period. At this time, you are advised to check the link quality or run the port link-flap protection enable command to configure link flapping protection.