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Cisco Bug: CSCsq84250 - DHCP Relay and DHCP Proxy conflict if both are configured.

Last Modified

Sep 22, 2021

Products (1)

  • Cisco Adaptive Security Appliance (ASA) Software

Known Affected Releases

7.0 8.6(1.2)

Description (partial)


ASA users see the following error message if DHCP Proxy Client is configured and they are trying to configure DHCP Relay:

"DHCP: Cannot enable DHCP Relay on an interface running DHCP Proxy.  Remove VPN DHCP config first."

Or, users that have both DHCP Relay and DHCP Proxy Client, see their VPN connections attempting to use DHCP Proxy failing.  If they have dhcpc debugs turned on they will see the following message:

"DHCP: Cannot enable DHCP Proxy on an interface running DHCP Relay, Relay Server, or Server."

This is an enhancement request to allow coexistence of DHCP Relay and DHCP Proxy Client.


DHCP Relay (either dhcprelay server or dhcprelay enabled) and DHCP Proxy Client configured for the same interface. Example:

dhcprelay server inside
dhcprelay enable WAN

tunnel-group USER_VPN_ACCESS general-attributes

group-policy CiscoVPNClient attributes

Related Community Discussions

Need to get a dhcp address from a internal DHCP server for my VPN users. 12 scopes
I have 12 scopes. I need to use ms dhcp server to dole out IP addresses who have entered the ISE via anyconnect.
Latest activity: Jan 01, 2020
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