Citrix Gateway Sends Traffic with Firewall's MAC Address

Citrix Gateway Sends Traffic with Firewall's MAC Address

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Article ID: CTX281417

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Description

Citrix Gateway (12.0 and 12.1 version) is intermittently sending UDP traffic to backend server using source MAC as VMAC of the Firewall (next hop for server subnet) when Intranet IP address(IIP) is enabled. This issue appear only during heavy load. 
This causes the Switch to learn the Firewall MAC from ADC’s port and causes the traffic routed to incorrect interface.

Resolution

Run the below command from ADC's cli prompt.
set l2param -usemymac ENABLED

With this configuration, the ADC would use its own MAC for all outgoing packets.
Note: This does not require L2 mode to be enabled 

Problem Cause

ADC's MAC Address should be used as source MAC address for all outgoing traffic instead of Firewall MAC address.