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Symptoms: DHCP Not Working on Remote VLAN

  • New hosts on VLAN 50 cannot obtain IP addresses via DHCP.
  • Hosts get APIPA addresses (169.254.x.x) after DHCP timeout.
  • DHCP works correctly on VLAN 10, where the DHCP server is located.
  • Other VLANs (20, 30, 40) that were set up previously have working DHCP.
  • The DHCP server logs show no DHCPDISCOVER messages from VLAN 50 clients.
  • VLAN 50 was recently provisioned; static IP hosts on VLAN 50 can route to the DHCP server.
  • The router has a working interface (SVI) on VLAN 50 with correct IP addressing.
  • Manually assigning an IP address on VLAN 50 allows full network connectivity.