DHCP Relay doesn’t work Cisco SG300 switch VLAN

Situation: the client created DHCP for VoIP 192.168.20.0/24 on the Windows server.

On the Cisco SG300, he also configured DHCP Relay for VoIP VLAN. command: ip dhcp relay address 192.168.20.0, ip dhcp relay enable.

However, phone devices on VoIP VLAN don’t receive the IP addresses from the DHCP.

Troubleshooting: on «DHCP Relay Server Table» you need to add the Windows Server IP Address and then, on DHCP> Interface Settings you need to add the VLAN where you want to apply the relay.

 

Published by

Bob Lin

Bob Lin, Chicagotech-MVP, MCSE & CNE Data recovery, Windows OS Recovery, Networking, and Computer Troubleshooting on http://www.ChicagoTech.net How to Install and Configure Windows, VMware, Virtualization and Cisco on http://www.HowToNetworking.com

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