Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 122)

98 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
53-1003031-02
Configuring MPLS
1
To configure the maximum reservable bandwidth as a percentage of the total interface bandwidth
for MPLS LSPs on the interface, enter the following commands as displayed in the following
example.
Brocade(config-mpls)# mpls-interface ethernet 1/1
Brocade(config-mpls-if-e1000-1/1)# reservable-bandwidth percentage 80
Syntax: [no] reservable bandwidth [decimal | percentage decimal]
The decimal variable specifies a value from 0 through 2,000,000,000 in kbits per second.
The percentage decimal parameter specifies a value from 0 through 100. The percentage value of
100 specifies that the entire interface bandwidth can be used by MPLS LSPs, when needed.
When maximum reservable bandwidth is changed from an absolute value to a percentage value,
and vice versa, the following advisory message is displayed on the console to indicate this
configuration change.
Brocade(config-mpls-if-e1000-1/1)# reservable-bandwidth percentage 40
Maximum reservable bandwidth is changed from 30 kbps to 40%
NOTE
When the maximum reservable bandwidth is configured as either an absolute value, or a percentage
value, the value is recalculated and updated to the latest value.
To set the maximum reservable bandwidth back to the default value (the total physical bandwidth
of the interface) when the absolute value or percentage value is used, enter the no form of the
command as displayed in the following example.
Brocade(config-mpls-if-e1000-1/1)# no reservable-bandwidth percentage 80
By default, the reservable bandwidth is the same as the maximum available bandwidth on the
interface. When the amount of reservable bandwidth is greater than the maximum available
bandwidth, then the link can be oversubscribed. When the reservable bandwidth is less than the
maximum available bandwidth, then LSPs cannot reserve all physical bandwidth on the interface.
When the reservable-bandwidth command is applied to the primary port within a LAG, the
bandwidth configured for that port applies to the entire LAG, regardless of any change to the
number of active ports within the LAG.
Changing the amount of reservable bandwidth on an interface causes the amount of unreserved
bandwidth to be recalculated. In addition, it may cause an OSPF-TE LSA or IS-IS TE LSP to be
issued, as well as possibly pre-empt existing LSPs when bandwidth reservations can no longer
accommodate them.
The output from the show mpls config command and the show mpls interface [ethernet slot/port]
command displays the maximum reservable bandwidth configuration. Depending on the interface
configuration, the show commands displays the maximum reservable bandwidth as an absolute
value, or as a percentage value. When the [no] form of the reservable-bandwidth command is
used, the default value of the interface bandwidth is also displayed in both show command