65b2f968_R_12000_Series_Router____Cisco_ase_verbose_Field_Descriptions_Description
[Field] Flags [Description] 
Flags carried in SRLG TLV. The Least Significant Bit (LSB) is set if the interface is numbered.
Cisco IOS XR Routing Command Reference for the Cisco XR 12000 Series Router, Release 4.2.x - IS-IS Commands on Cisco IOS XR Software [Cisco XR 12000 Series Router] - Cisco