TopicIT Networking →
Simple definition
A function of switch that controls authorized DHCP messages.
Technical definition
DHCP Snooping distinguishes ports-l and untrusted and builds a table of associations IP/McG/VLAN.
What’s the point? ?
Block fake DHCP servers.
Concrete example
Only the uplink port to the DHCP server can be marked as a trusted.
Common problems
- Port uplink non-rust
- Legitimate blocked DHCP
- Table not used by complementary functions
Related terms
To be noted: precise behaviors and commands may vary depending on the versions, products and architectures.