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use-metric-style
Configures the router to use narrow or wide metric styles when building the IS-IS route table.
Syntax: use-metric-style [narrow | wide | prefer-narrow | prefer-wide]
narrow
Use only the original IS-IS narrow metric style to build the IS-IS route table. Narrow metrics range from 0 to 63 (6 bits).
wide
Use the traffic engineering wide metric style to build the IS-IS route table. Wide metrics range from 0 to 17777215 (24 bits).
prefer-narrow
If both metric styles are present, use the narrow style to build the IS-IS route table.
prefer-wide
If both metric styles are present, use the traffic engineering wide style to build the IS-IS route table.
Description: Traditional IS-reachability TLVs contains information about IS neighbors, including one octet devoted to information about the default metric. Only 6 bits of this octet are used to store the actual metric. Traffic engineering extensions expand the portion of the TLV used to describe the metric from the traditional 6 bits to 24 bits.
NOTE When using IS-IS as the IGP in an MPLS network, the metric style MUST be set to wide, or the tunnels can not come up.
Use the use-metric-style narrow command to build the IS-IS route table using the traditional narrow 6-bit metric style.
Use the use-metric-style wide command to build the IS-IS route table using the traffic engineering wide 24-bit metric style.
Use the use-metric-style prefer-narrow command to build the IS-IS route table using the narrow 6-bit metric style when both metric styles are present. If the narrow style is not available, use the wide style.
Use the use-metric-style prefer-wide command to build the IS-IS route table using the wide 24-bit metric style when both metric styles are present. If the wide style is not available, use the narrow style.
Factory Default: Narrow.
Command Mode: Router configuration.
Example: In the following example,
- The the router isis command enables IS-IS on the router, specifies an IS-IS instance, and changes the command mode to Router configuration.
- The do show running-config isis command displays the current configuration.
- The use-metric-style prefer-wide command configures the router to build the IS-IS route table using the wide metric style if it is available.
- The show running-config isis command displays the changed configuration:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#router isis 10
router(config-router)#do show running-config isis
!
router isis 10
net 49.0001.0000.0001.00
metric-style wide
redistribute maximum-prefixes 5000
!
router(config-router)#use-metric-style prefer-wide
router(config-router)#do show running-config isis
!
router isis 10
net 49.0001.0000.0001.00
send-metric-style wide
use-metric-style prefer-wide
redistribute maximum-prefixes 5000
!
router(config-router)#
Related Commands: isis metric
router isis
send-metric-style
mpls te default-metric
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Copyright © 2004
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
trademarks of Avici Systems Inc.
Source
File Name: ISIS.fm
HTML File Name: ISIS56.html
Last Updated: 05/10/04 at 16:35:45