Auto-Cost Reference Bandwidth - Allied Telesis SwitchBlade x908 Series Software Reference Manual

OSPF Commands

auto-cost reference bandwidth

This command controls how OSPF calculates default metrics for the interface.
By default, OSPF calculates the OSPF metric for an interface by dividing the reference
bandwidth by the interface bandwidth. The default value for the reference bandwidth is
100 Mbps. As a result, if this default value is used, there is very little difference between the
metrics applied to interfaces of increasing bandwidth beyond 100 Mbps. The auto-cost
command is used to alter this reference bandwidth in order to give a real difference between
the metrics of high bandwidth links of differing bandwidths. In a network that has multiple links
with high bandwidths, specify a larger reference bandwidth value to differentiate the costs on
those links.
The no form of this command assign cost based only on the interface bandwidth.
Syntax
auto-cost reference-bandwidth <1-4294967>
no auto-cost reference-bandwidth
Parameter
<1-4294967>
Router mode
Mode
Examples
awplus(config-router)#
ip ospf cost
Related Commands
36.12
Description
The reference bandwidth in terms of Mbits per second (Mbps).
Default: 100
awplus# configure terminal
awplus(config)# router ospf 100
auto-cost reference-bandwidth 1000
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1 C613-50007-01 REV B