The value of vRtrIfOperV4DownReason indicates the reason why the interface is operationally down. The bit values are: 'ifAdminDown (0)' - Interface is administratively down 'svcAdminDown (1)' - Service is administratively down 'portOperDown (2)' - SAP port is operationally down 'addrOrIfNotReady (3)' - Address or Parent interface is not ready 'assocObjNotReady (4)' - Associated object is not ready 'rvplsDown (5)' - R-VPLS service is down 'operGrpDown (6)' - Associated Operational Group is down 'ifAdminDestroy (7)' - Interface is being deleted 'noIfAddress (8)' - Interface address is not configured 'noIfInfo (9)' - Interface info not present 'delayedStartEnabled (10)' - Delayed start timer is enabled on the interface 'ifProtoOperDown (11)' - Protocols on interface are operationally down 'invalidPortCfg (12)' - Port configuration is not valid 'unknown (13)' - Reason is unknown 'noRouteDistinguisher (14)' - Route Distinguisher not configured in VPRN 'wlanGwRedundancyStandby (15)' - Interface is in standby state for WLAN-GW redundancy 'wlanGwGroupDegraded (16)' - The associated WLAN-GW group is in a degraded state 'ipControlTunnelOperDown (17)' - The IP tunnel associated to a control-tunnel interface is operationally down 'pdnAddressMismatch (18)' - The IP address learned from the packet data network does not match the configured primary IP address 'pingCheckFailure (19)' - The IP interface is or went down because of ping-template failure 'portInternalLoopback (20)' - The IP interface is bound to a port that has an internal loopback configured