
OSPF Commands
©2008 Allied Telesis Inc. All rights reserved.
Software Version 5.2.1
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
30.11
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
100Mbps. 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
Mode
Router mode
Examples
awplus#
configure terminal
awplus(config)#
router ospf 100
awplus(config-router)#
auto-cost reference-bandwidth 1000
Related Commands
ip ospf cost
Parameter
Description
<1-4294967>
The reference bandwidth in terms of Mbits per second (Mbps).
Default:
100