API Guide

DHCP snooping in a VLT environment
OS10 supports DHCP snooping in a VLT environment. DHCP snooping switches in a VLT topology synchronize DHCP snooping
binding information between them. The system interprets the VLTi link between VLT peers as trusted interfaces. To configure
DHCP snooping in a VLT environment:
● Enable DHCP snooping on both VLT peers.
● Configure the VLT port-channel interfaces facing the DHCP server as trusted interfaces.
In the following VLT topology, AGG1 and AGG2 are VLT peers and have VLT port-channel interfaces connected to the VM
server and Core switch. The DHCP server is reachable through the CORE switch. The following describes the functioning of
DHCP snooping in a VLT environment:
● One of the VLT peers receives a DHCP client packet from a DHCP client on the VM server through the VLT port-channel
interface. The switch processes this packet.
● The VLT peer forwards the DHCP client packet to the Core switch through the VLT port-channel interface.
● The Core switch forwards the DHCP reply packet from the DHCP server to one of the VLT peers, which processes the
packet.
● If the DHCP reply packet is from a trusted DHCP server, the VLT peer forwards the reply packet to the DHCP client on the
VM server.
● The VLT peers synchronize the DHCP snooping binding table.
System management
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