VIAVI TestCenter: Why VIAVI TestCenter reports an error "Interface IPv4 x on Device Host x has invalid Network Stack" on apply?

VIAVI TestCenter: Why VIAVI TestCenter reports an error "Interface IPv4 x on Device Host x has invalid Network Stack" on apply?

• Based on the error, the device configured with IPv4 encapsulation. Error Detail: Multicast MAC Address configured for Source MAC Address   ERROR messages from Logs: 1/16/2013 12:38:14 .7     Error      Other    Interface EthIIIf: Multicast MAC address is not allowed for emulated devices (Host x) 1/16/2013 12:38:14 .7     Info        Other    Interface IPv4 x on Device Host x has invalid Network Stack. Please see log for details   07:10:94:00:00:01 is a Multicast MAC Address   RESOLUTION: • Since this is a Layer 3 Unicast device, set the Ethernet Source Mac Address to a Unicast MAC Address.                Example 06:10:94:00:00:01   IANA MAC Detail: