Whether or not the first AS number in the AS_PATH attribute in an UPDATE received from this peer should be checked to make sure it is the same as the AS number of the peer. This flag only applies to EBGP peers. It should be set to True unless the peer has a specific policy that means it does not prepend its AS number so that it is the first in the path. When set to 'true', DC-BGP checks the first AS number in UDPATES received from the peer. When set to 'false', DC-BGP does not check the first AS number in UDPATES received from the peer. When set to 'inherit', the behavior for is determined by the setting of the bgpRmEntCheckFirstAsNum field. If a peer belongs to the peer group, then the peer's configuration is taken from either this field or the equivalent peer field, depending on the setting of the bit in the bgpPeerConfigUsage field. The value for the peer or peer group is determined and, if this is 'inherit', then the bgpRmEntCheckFirstAsNum value is used. This field can be changed at any time. However, if a peer is configured to use the peer group field and the field is changed while the peer is active, depending on the setting of the bgpPeergrResetPeerOnCfgChange field, the peer session may either be immediately reset, or the configuration change is not applied until the peer session is restarted.