Licensing Requirements and Limitations for DHCP Snooping
Involved Network Elements
Other network elements are not required.
Licensing Requirements
DHCP snooping is a basic function of the switch, and as such is controlled by the license for basic software functions. The license for basic software functions has been loaded and activated before delivery. You do not need to manually activate it.
Version Requirements
Product Model |
Minimum Version Required |
|---|---|
CE12804/CE12808/CE12812 |
V100R002C00 |
CE12816 |
V100R003C00 |
CE12804S/CE12808S |
V100R005C00 |
CE12804E/CE12808E/CE12816E |
V200R002C50 |
For details about the mapping between software versions and switch models, see the Hardware Query Tool.
Software version evolution: V100R001C00 -> V100R002C00 -> V100R003C00 -> V100R003C10 -> V100R005C00 -> V100R005C10 -> V100R006C00 -> V200R001C00 -> V200R002C50 -> V200R003C00 -> V200R005C00 -> V200R005C10 -> V200R019C00 -> V200R019C10
Feature Limitations
In V100R005C00 and earlier versions, DHCP snooping and TRILL cannot be used together. In V100R005C10 and later versions, by default, DHCP snooping and TRILL cannot be used together. To use both of them, run the trill adjacency-check disable command first. The TRILL function has a higher priority than DHCP snooping. If DHCP snooping is configured before TRILL, only TRILL takes effect.
The device supports association between ARP and DHCP snooping only when the device functions as a DHCP relay agent.
DHCP Option 82 must be configured on the user-side of a device; otherwise, the DHCP message sent to the DHCP server will not carry Option 82.
- Splitting interfaces do not support DHCP Option 82.
- For CE12800, in a VXLAN, DHCP snooping can only be configured on a network-side interface, and cannot be configured together with DHCP relay.
- DHCP snooping cannot be configured on the IPv6 VXLAN tunnel.
DHCP snooping can only be configured with 1-to-1 VLAN mapping.
- When M-LAG is used, DHCP snooping is not supported.
- DHCP snooping cannot be configured on Eth-Trunk member interfaces.