This value indicates whether or not the Backward Transition trap is used for peers in this peer group. 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.