Enabling ldp over rsvp – 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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LDP over RSVP (for transit LSR only)
2
•
The RSVP tunnel must be enabled for LDP tunneling. For more information on enabling LDP
tunneling, refer to
NOTE
When an RSVP tunnel is created on ingress LSR with IS-IS or OSPF shortcuts enabled, and LDP
tunneling is also enabled, then the LDP tunnel to the egress router of the RSVP tunnel is not formed.
An LDP tunnel is not created at the ingress LSR when RTM selects the RSVP tunnel as the next-hop
to the destination.
When a targeted session is used for LDP over RSVP, prefix FECs are advertised to its targeted peer,
and prefix FEC received from a targeted peer is installed.
A targeted LDP session is brought up when any one of the following configurations exist:
•
A targeted peer address is set up on the egress router of an RSVP tunnel. For more information
on configuring a targeted peer address, refer to
“Configuring a targeted peer address”
•
The user enables RSVP LSP with LDP tunneling configured. For more information on
configuring LDP tunneling, refer to
.
•
A Layer 2 VPN (VLL or VPLS) peer is configured.
Enabling LDP over RSVP
To enable LDP traffic to tunnel across an RSVP tunnel, first create an LSP, then enable LDP
tunneling on the LSP as shown in the following example.
Brocade(config)# router mpls
Brocade(config-mpls)# lsp blue
Brocade(config-mpls-lsp-blue)# to 10.20.20.20
Brocade(config-mpls-lsp-blue)# ldp-tunneling
The following message appears on the CLI.
This LSP can be used for LDP tunneling if it is used as a shortcut.
This message implies that when an RSVP tunnel is used as an IS-IS or OSPF shortcut, then the
shortcut must be explicitly configured.
NOTE
There is no configuration needed for BGP shortcut.
To enable IS-IS shortcuts or OSPF shortcuts, enter the shortcuts isis command, or the shortcuts
ospf command as shown in the following example.
Brocade(config-mpls-lsp-blue)# shortcuts isis level2
Brocade(config-mpls-lsp-blue)# enable
Connecting signaled LSP blue
Syntax: [no] ldp-tunneling
Syntax: [no] shortcuts isis level1 | level 2
Syntax: [no] shortcuts ospf