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• 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)
Congure 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 dierent cost ranges for the route. The cost range for the narrow metric style is from 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 (congured
with the isis metric command) could be aected.
In the following scenarios, the IS-type is either Level-1 or Level-2 or Level-1-2 and the metric style changes.
Table 43. 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.
wide transition truncated value (the truncated value
appears in the LSP only). The original isis
metric value is displayed in the show
config
and show running-config
commands and is used if you change back
to transition metric style.
NOTE: A truncated value is a value
that is higher than 63, but set back
to 63 because the higher value is
not supported.
wide narrow transition default value (10) if the original value is
greater than 63. A message is sent to the
console.
498 Intermediate System to Intermediate System