Protocols; Mpls Configuration Task List - HP 12500 Series Configuration Manual

Initialize negotiation of session parameters such as the LDP version, label advertisement mode,
and Keepalive interval.
After establishing a session between them, the two LDP peers send Hello messages and Keepalive
messages to maintain the session.
LSP establishment and maintenance
3.
LDP sends label requests and label binding messages between LDP peers to establish LSPs.
For the LSP establishment process, see
Session termination
4.
An LSR terminates its LDP session with an LDP peer in the following cases:
All Hello adjacencies are deleted between the two peers
LDP peers periodically send Hello messages to indicate that they intend to keep the Hello
adjacency. If an LSR does not receive any Hello message from a peer before the Hello timer
expires, it deletes the Hello adjacency with this peer. An LDP session has one or more Hello
adjacencies. When the last Hello adjacency for the session is deleted, the LSR will send a
Notification message to terminate the LDP session.
Loss of session connectivity
An LSR determines the integrity of an LDP session according to the LDP PDU (which carries one
or more LDP messages) transmitted on the session. Before the Keepalive timer times out, if two
LDP peers have no information to exchange, they can send Keepalive messages to each other
to maintain the LDP session. If an LSR does not receive any LDP PDU from its peer during a
Keepalive interval, it closes the TCP connection and terminates the LDP session.
Receiving a shutdown message from the peer
An LSR can also send a Shutdown message to its LDP peer to terminate the LDP session.
Therefore, when receiving the Shutdown message from an LDP peer, an LSR terminates the
session with the LDP peer.

Protocols

MPLS related protocols include:
RFC 3031, Multiprotocol Label Switching Architecture
•
RFC 3032, MPLS Label Stack Encoding
•
• RFC 5036, LDP Specification

MPLS configuration task list

Complete the following tasks to configure MPLS:
Task
Enabling the MPLS function
Configuring a static LSP
Establishing dynamic LSPs
through LDP
"LSP establishment and label
Configuring MPLS LDP capability
Configuring local LDP session
parameters
Configuring remote LDP session
parameters
9
distribution."
Remarks
Required
Required
Required
Use either the static
or dynamic LSP
Optional
configuration
method
Optional