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What is tunnel LSP?
This network configuration example provides an overview of a Resource Reservation Protocol (RSVP) label-switched path (LSP) tunnel that enables you to send RSVP LSPs inside other RSVP LSPs. This enables a network administrator to provide traffic engineering from one end of the network to the other.
What is MPLS tunnel?
Multiprotocol Label Switching (MPLS) is a tunneling technology used in many service provider networks. The most popular MPLS-enabled application in use today is the MPLS virtual private network. MPLS VPNs were developed to operate over MPLS networks, but they can also run over native IP networks.
What is explicit path in MPLS?
An explicit path is configured on the ingress of an MPLS TE tunnel to define the nodes through which the MPLS TE tunnel passes and the nodes that are excluded from the MPLS TE tunnel.
Which protocol is used for path setup in MPLS traffic engineering?
Prerequisites for MPLS Traffic Engineering and Enhancements IP Cisco Express Forwarding. Intermediate System-to-Intermediate System (IS-IS) or Open Shortest Path First (OSPF)
Is LSP a tunnel?
Due to the forwarding of packets through an LSP being opaque to higher network layers, an LSP is also sometimes referred to as an MPLS tunnel. The router which first prefixes the MPLS header to a packet is called an ingress router.
What is the purpose of MPLS?
MPLS Defined Multiprotocol Label Switching (MPLS) is data forwarding technology that increases the speed and controls the flow of network traffic. With MPLS, data is directed through a path via labels instead of requiring complex lookups in a routing table at every stop.
What is IP explicit path?
Feature Overview. The MPLS traffic engineering Internet Protocol (IP) explicit address exclusion feature provides a means to exclude a link or node from the path for an MPLS traffic engineering label-switched path (LSP).
What is affinity in MPLS TE?
The basic idea about MPLS TE affinity is to add an attribute to a link and be able to include or exclude this link during path calculation. The concept is also known as link coloring. Affinity is configured on links using the mpls traffic-eng attribute-flags <0x0-0xFFFFFFFF> interface command.
What is the Label Switched Path in MPLS?
The Label Switched Path. The path taken through the MPLS domain by a packet is referred to as a label switched path (LSP). The path taken may not be understood or completely stored by any one LSR within the MPLS domain, although in some cases it is. For example, traffic engineering allows the complete path to be stored at all LSRs along the path.
How is a LSP created in IP / MPLS?
LSP is created in two ways in IP/MPLS over MPLS-TP. One way is to create MPLS-TP LSP, and notify the IP/MPLS network in FA (forwarding adjacent) mode. When IP/MPLS LSP is created, the created TP LSP can be considered as a direct link to participate in the routing.
What’s the difference between a LSP and a LDP?
Simply, LSP is a sequence of LSRs used to forward labeled packets of a certain FEC (An LSP is simillar to FR or ATM VC), while LDP is the protocol used for label distribution in the MPLS domain (it can be Cisco proprietary TDP or the standard LDP).
How are Label Switched Paths constructed in LSR?
Label switched paths are typically constructed in a control-driven manner using topology information found in the LSR’s routing database. When converged, the routing database contains a list of shortest (or otherwise constrained) nonlooping paths within the MPLS domain.