Reference Guide

466 | Intermediate System to Intermediate System
www.dell.com | support.dell.com
By default, FTOS generates and receives narrow metric values. Metrics or costs higher than 63 are not
supported. To accept or generate routes with a higher metric, you must change the metric style of the IS-IS
process. For example, if metric is configured as narrow, and an LSP with wide metrics is received, the
route is not installed.
FTOS supports the following IS-IS metric styles:
Use the following command in ROUTER ISIS mode to change the IS-IS metric style of the IS-IS process.
Use the
show isis protocol command (Figure 476) in EXEC Privilege mode to view which metric types are
generated and received.
Table 24-2. Metric Styles
Metric Style Characteristics
Cost Range Supported on IS-IS
Interfaces
narrow Sends and accepts narrow or old TLVs (Type
Length Value).
0 to 63
wide Sends and accepts wide or new TLVs 0 to 16777215
transition Sends both wide (new) and narrow (old) TLVs. 0 to 63
narrow transition Sends narrow (old) TLVs and accepts both narrow
(old) and wide (new) TLVs
0 to 63
wide transition Sends wide (new) TLVs and accepts both narrow
(old) and wide (new) TLVs.
0 to 16777215
Command Syntax Command Mode Purpose
metric-style {narrow [transition] |
transition | wide [transition]} [level-1 |
level-2]
ROUTER ISIS Set the metric style for the IS-IS process.
Default: narrow
Default: Level 1 and Level 2 (level-1-2)