The state of tBgpInstanceAlwaysCompareMED specifies whether Multi-Exit Discriminator (MED) path attribute will be compared when coming from different AS and used in the BGP route selection process. A state of 'off' specifies that only the MEDs of routes that have the same peer ASs are compared. A state of 'on' specifies that the Multi-Exit Discriminator (MED) value will be compared when coming from different ASs and if one of the route has no MED it should be assigned the lowest possible value of 'zero'. A value of 'zero' or 'infinity' specifies that the MED attribute is always used in the route selection process regardless of the peer AS that advertised the route. If the route does not have MED it is assigned the value of 'zero' or 'infinity' respectively.