The IPv4 TOS translation type used by the CE. RFC 6145 states that the IPv6 Traffic Class (TC) field of the translated packet should be copied from the IP Type of Service (TOS) octet. Optionally, an implementation should also support a mode where the IPv6 traffic class is set to zero.
Setting this testvar to a value of yes indicates that the CE implements IPv4 TOS translation. Setting this testvar to a value of no indicates that the CE does not implement IPv4 TOS translation and instead sets the IPv6 TC field to a value of all zeros.
This testvar was added in CDRouter 10.2