Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 120)

96 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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Configuring MPLS
1
Displaying MPLS policy parameters
Use the show mpls policy command to display the current parameter settings configured under the
MPLS policy mode. The following example shows the route filtering configuration in output from the
show mpls policy command.
Brocade# show mpls policy
Current MPLS policy settings:
CSPF interface constraint: disabled
MPLS label TTL propagation: disabled, IPVPN packet TTL propagation: disabled
Inter-AS route filtering: enabled, Intra-AS iBGP route-filtering: disabled
Polling interval for MPLS LSP traffic statistics: 60 seconds
Advertise TE parameters via: ISIS level-1
LSP rapid retry: enabled, maximum number of retries: no limit
LSP periodic retry time: 30 seconds
Admin group: none
Syntax: show mpls policy
Setting traffic engineering parameters for MPLS interfaces
When using constraints to determine a path for an LSP, the device takes into account information
included in OSPF-TE LSAs or IS-IS LSPs with TE extensions. This information can be used to set up a
path for a new LSP or to preempt an existing LSP so that an LSP with a higher priority can be
established.
OSPF-TE LSAs and IS-IS LSPs with TE extensions include Type/Length/Value triplets (TLVs)
containing the following information:
• Link type (either point-to-point or multiaccess network) (OSPF-TE LSAs only)
• Link ID (for point-to-point links, this is the Router ID of the LSR at the other end of the link; for
multiaccess links, this is the address of the network’s designated router) (OSPF-TE LSAs only)
• IP address of the local interface
• IP address of the remote interface (must exist with point-to-point links)
• Traffic engineering metric for the link
• Maximum bandwidth on the interface
• Maximum reservable bandwidth on the interface
• Unreserved bandwidth on the interface
• Administrative groups to which the interface belongs
When configured to do so with the traffic-engineering ospf command, the device sends out
OSPF-TE LSAs containing this information for each of its MPLS-enabled interfaces. When
configured to do so with the traffic-engineering isis command, the device sends out IS-IS LSPs
containing this TE information for each of its MPLS-enabled interfaces. Optionally, the user can
specify the maximum amount of bandwidth that can be reserved on an interface. In addition, the
user can assign interfaces to administrative groups.
Reserving bandwidth on an interface
OSPF-TE LSAs and IS-IS LSPs with TE extensions contain three TLVs related to bandwidth
reservation: