Glossary
Dell EMC Networking OS displays debug messages on the console. To view which debugging commands are enabled, use the
show debugging command in EXEC Privilege mode.
To disable a specific debug command, enter the keyword no then the debug command. For example, to disable debugging of
IS-IS updates, use the no debug isis updates-packets command.
To disable all IS-IS debugging, use the no debug isis command.
To disable all debugging, use the undebug all command.
IS-IS Metric Styles
The following sections provide additional information about the IS-IS metric styles.
● Configuring the IS-IS Metric Style
● Configure Metric Values
Dell EMC Networking OS supports the following IS-IS metric styles:
● narrow (supports only type, length, and value [TLV] up to 63)
● wide (supports TLV up to 16777215)
● transition (supports both narrow and wide and uses a TLV up to 63)
● narrow transition (accepts both narrow and wide and sends only narrow or old-style TLV)
● wide transition (accepts both narrow and wide and sends only wide or new-style TLV)
Configure Metric Values
For any level (Level-1, Level-2, or Level-1-2), the value range possible in the isis metric command in INTERFACE mode
changes depending on the metric style.
The following describes the correct value range for the isis metric command.
Metric Style
Correct Value Range for the isis metric Command
wide 0 to 16777215
narrow 0 to 63
wide transition 0 to 16777215
narrow transition 0 to 63
transition 0 to 63
Maximum Values in the Routing Table
IS-IS metric styles support different cost ranges for the route. The cost range for the narrow metric style is 0 to 1023, while all
other metric styles support a range of 0 to 0xFE000000.
Change the IS-IS Metric Style in One Level Only
By default, the IS-IS metric style is narrow. When you change from one IS-IS metric style to another, the IS-IS metric value
(configured with the isis metric command) could be affected.
In the following scenarios, the IS-type is either Level-1 or Level-2 or Level-1-2 and the metric style changes.
Table 48. Metric Value When the Metric Style Changes
Beginning Metric Style Final Metric Style Resulting IS-IS Metric Value
wide narrow default value (10) if the original value is
greater than 63. A message is sent to
the console.
Intermediate System to Intermediate System 483