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Cisco Bug: CSCsz59759 - ENH: DHCP Source Interface Command for DHCP Relay

Last Modified

Feb 12, 2018

Products (2)

  • Cisco ASA 5500-X Series Firewalls
  • Cisco ASA 5580 Adaptive Security Appliance

Known Affected Releases


Description (partial)


Symptom:Dhcp relay source interface feature request

Conditions:Customer would like to have a command that enables them to specify a source interface for DHCP relay traffic (By default the DHCP relay traffic will be sourced from the interface it leaves, so if the dhcp server exist externally over a site to site or a ezvpn connection  the cu would need to creat a sa between the outside IP and the DHCP server in the interesting traffic ACL)

The above scenario breaks in the case when the outside IP address of the ASA at multiple spoke sites is being assigned a private ip address from a DSL or CABLE modem  (ex. or  that is the same between all sites because of the ISP's modem assigning the same address space  by default
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