Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) User Manual
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Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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RSVP message authentication on an MPLS VE interface
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two ports, and each port is one gig. To calculate the bandwidth of the trunk, the user takes the sum
of all active ports on a physical port. In this example, the bandwidth of the trunk is equal to two
gigs. To calculate the bandwidth of the VE interface, take the minimum of all active port members.
In this example, the bandwidth of the VE interface is one gig.
Configuration Considerations
A VE interface bandwidth must be recomputed when any one of the following occurs:
•
A new member port is added to a VLAN associated with a VE interface.
•
A new member port is removed from a VLAN associated with a VE interface.
•
When a member port of a VLAN associated with a VE interface is up.
•
When an active member port of a VLAN associated with a VE interface that is down.
A physical port can be part of more than one VE interface. Each VE interface assumes that it has a
full amount of reservable bandwidth for a physical port. However, the amount of reservable
bandwidth on one VE is not reflected on another VE interface even though both VE interfaces share
the same physical port. For example, when there are two VE interfaces; VE1 and VE2. Each VE
interface supports the same amount of reservable bandwidth of 1Gbps. The amount of reservable
bandwidth used to set up LSPs on VE1 is not reflected in the amount reservable bandwidth that is
available on VE2. This results in an excess amount of reservable bandwidth that can be supported
on a physical port. This causes data traffic to be dropped.
The default bandwidth for a VE interface is computed automatically, and is based on the underlying
physical links. The user can now override the default bandwidth for a VE interface by executing the
reservable-bandwidth command. The following example demonstrates how to override the default
behavior by configuring reservable bandwidth to 400mbps on MPLS interface ve 100.
Brocade(config)# router mpls
Brocade(config-mpls)# mpls-interface ve 100
Brocade(config-mpls-if-ve-100)# reservable-bandwidth 400000
Syntax: [no] reservable-bandwidth number
The number variable refers to the amount of reservable bandwidth that is supported on an MPLS
interface, including an MPLS enabled VE interface. The range for this value is 0 - 80000000 kbps.
The [no] option removes all configuration for reservable bandwidth on an MPLS enabled VE
interface.
RSVP message authentication on an MPLS VE interface
Support was added for RSVP message authentication using MD5 as described in RFC 2747. It is
implemented on the Brocade devices to prevent spoofing of RSVP messages. All inbound RSVP
messages on an interface must contain RSVP Integrity object for getting authenticated and
accepted by RSVP. Inbound RSVP messages with no Integrity object, or an incorrect integrity object
is dropped by RSVP. All outbound RSVP messages on an interface contain an RSVP Integrity object.
For more information on RSVP message authentication, refer to