Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 161)

Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 137
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Setting up signaled LSPs
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For example, the following commands cause CSPF to select the path with the highest available
bandwidth when choosing among equal-cost paths calculated for LSP tunnel1.
Brocade(config-mpls)# lsp tunnel1
Brocade(config-mpls-lsp)# tie-breaking least-fill
Syntax: [no] tie-breaking least-fill | most-fill | random
The least-fill parameter causes CSPF to choose the path with the highest available bandwidth (that
is, the path with the least utilized links).
The most-fill parameter causes CSPF to choose the path with the lowest available bandwidth (that
is, the path with the most utilized links).
The random parameter causes CSPF to choose the path randomly from the equal-cost paths. This
is the default.
Disabling the record route function
The RSVP RECORD_ROUTE object (RRO) allows an LSPs path to be recorded. An RRO consists of a
series of subobjects that can contain the addresses of the LSRs in the path. This information can
be viewed with the show mpls lsp detail command. The path information is recorded in the RRO by
default, but the user can disable path recording.
To disable path recording in the RRO.
Brocade(config-mpls)# lsp tunnel1
Brocade(config-mpls-lsp)# no record
Syntax: [no] record
Disabling CSPF path calculations
By default, CSPF is enabled for signaled LSP calculations. That is, when the device receives
OSPF-TE LSAs, it places the traffic engineering information from them in its Traffic Engineering
Database (TED). When the device is the ingress LER for the LSP, it uses the information in the TED
to help determine a path for the LSP. When all nodes in the user’s network are not capable of
sending out OSPF-TE LSAs, the user may want to disable CSPF for the LSP.
To disable constraint-based path selection for LSP tunnel1.
Brocade(config-mpls)# lsp tunnel1
Brocade(config-mpls-lsp)# no cspf
Syntax: [no] cspf
LDP tunnel metric
The user can use LDP tunnel metric information to decide whether LDP or RSVP is the preferred
method for BGP nexthop resolution.