65b2f968_R_12000_Series_Router____Cisco_ase_verbose_Field_Descriptions_Description
[Field] Metric [Description] 
IS-IS metric for the cost of the adjacency between the originating router and the advertised neighbor, or the metric of the cost to get from the advertising router to the advertised destination (which can be an IP address, an end system (ES), or a Connectionless Network Service (CLNS) prefix).
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