Dell S6100 Configuration Manual page 468

Configuring the IS-IS Metric Style
All IS-IS links or interfaces are associated with a cost that is used in the shortest path first (SPF) calculations. The possible cost varies
depending on the metric style supported.
If you configure narrow, transition, or narrow transition metric style, the cost can be a number between 0 and 63. If you configure wide or
wide transition metric style, the cost can be a number between 0 and 16,777,215. Dell Networking OS supports five different metric styles:
narrow, wide, transition, narrow transition, and wide transition.
By default, Dell Networking OS generates and receives narrow metric values. Matrixes 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 you configure the
metric as narrow, and a link state PDU (LSP) with wide metrics is received, the route is not installed.
Dell Networking OS supports the following IS-IS metric styles.
Table 43. Metric Styles
Metric Style
narrow
wide
transition
narrow transition
wide transition
To change the IS-IS metric style of the IS-IS process, use the following command.
• Set the metric style for the IS-IS process.
ROUTER ISIS mode
metric-style {narrow [transition] | transition | wide [transition]} [level-1 | level-2]
The default is narrow.
The default is Level 1 and Level 2 (level-1–2)
To view which metric types are generated and received, use the show isis protocol command in EXEC Privilege mode. The IS-IS
matrixes settings are in bold.
Example of Viewing IS-IS Metric Types
Dell#show isis protocol
IS-IS Router: <Null Tag>
System Id: EEEE.EEEE.EEEE IS-Type: level-1-2
Manual area address(es):
47.0004.004d.0001
Routing for area address(es):
21.2223.2425.2627.2829.3031.3233
47.0004.004d.0001
Interfaces supported by IS-IS:
Vlan 2
TenGigabitEthernet 1/1/1/4
Loopback 0
Redistributing:
468 Intermediate System to Intermediate System
Characteristics
Sends and accepts narrow or old TLVs
(Type, Length, Value).
Sends and accepts wide or new TLVs.
Sends both wide (new) and narrow (old)
TLVs.
Sends narrow (old) TLVs and accepts both
narrow (old) and wide (new) TLVs.
Sends wide (new) TLVs and accepts both
narrow (old) and wide (new) TLVs.
Cost Range Supported on IS-IS Interfaces
0 to 63
0 to 16777215
0 to 63
0 to 63
0 to 16777215