Related Documentation
- ACX, J, M, MX, SRX, T Series
- Example: Configuring IS-IS
- Additional Information
- https://www.juniper.net/us/en/training/certification/JNCIP_studyguide.pdf
reference-bandwidth (Protocols IS-IS)
Syntax
Hierarchy Level
Release Information
Statement introduced before Junos OS Release 7.4.
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Statement introduced in Junos OS Release 12.1 for the QFX Series.
Description
Optimize routing based on bandwidth by setting the reference bandwidth used in calculating the default interface cost.
All IS-IS interfaces have a cost, which is a routing metric that is used in the IS-IS link-state calculation. Routes with lower total path metrics are preferred over those with higher path metrics. When there are several equal-cost routes to a destination, traffic is distributed equally among them.
The cost of a route is described by a single dimensionless metric that is determined using the following formula:
For example, if you set the reference bandwidth to 1 Gbps (that is, reference-bandwidth is set to 1,000,000,000), a 100-Mbps interface has a routing metric of 10.
All IS-IS interfaces have a cost, which is a routing metric that is used in the IS-IS link-state calculation. Routes with lower total path metrics are preferred over those with higher path metrics.
Options
reference-bandwidth—Reference bandwidth value in bits per second.
Range: 9600 through 1,000,000,000,000 bps
Default: None
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Related Documentation
- ACX, J, M, MX, SRX, T Series
- Example: Configuring IS-IS
- Additional Information
- https://www.juniper.net/us/en/training/certification/JNCIP_studyguide.pdf
Published: 2014-07-23
Related Documentation
- ACX, J, M, MX, SRX, T Series
- Example: Configuring IS-IS
- Additional Information
- https://www.juniper.net/us/en/training/certification/JNCIP_studyguide.pdf