Cisco Cisco IOS Software Release 12.2(25)S
MPLS LDP Inbound Label Binding Filtering
Glossary
16
Multiple Releases (See Feature History Table)
Glossary
carrier supporting carrier—A situation where one service provider allows another service provider to
use a segment of its backbone network. The service provider that provides the segment of the backbone
network to the other provider is called the backbone carrier. The service provider that uses the segment
of the backbone network is called the customer carrier.
use a segment of its backbone network. The service provider that provides the segment of the backbone
network to the other provider is called the backbone carrier. The service provider that uses the segment
of the backbone network is called the customer carrier.
CE router—customer edge router. A router that is part of a customer network and that interfaces to a
provider edge (PE) router.
provider edge (PE) router.
inbound label binding filtering—Allows LSRs to control which label bindings it will accept from its
neighboring LSRs. Consequently, an LSR does not accept or store some label bindings that its neighbors
advertise.
neighboring LSRs. Consequently, an LSR does not accept or store some label bindings that its neighbors
advertise.
label—A short fixed-length identifier that tells switching nodes how to forward data (packets or cells).
label binding—An association between a destination prefix and a label.
LDP—label distribution protocol. The protocol used to distribute label bindings to LSRs.
LFIB—label forwarding information base. The data structure used by switching functions to switch
labeled packets.
labeled packets.
LIB—label information base. A database used by an LSR to store labels learned from other LSRs, as
well as labels assigned by the local LSR.
well as labels assigned by the local LSR.
LSP—label-switched path. A sequence of hops in which a packet travels from one router to another
router by means of label switching mechanisms. A label-switched path can be established dynamically,
based on normal routing mechanisms, or through configuration.
router by means of label switching mechanisms. A label-switched path can be established dynamically,
based on normal routing mechanisms, or through configuration.
LSR—label switch router. A Multiprotocol Label Switching (MPLS) node that can forward native
Layer 3 packets. The LSR forwards a packet based on the value of a label attached to the packet.
Layer 3 packets. The LSR forwards a packet based on the value of a label attached to the packet.
LVC—label VC. An ATM virtual circuit that is set up through ATM LSR label distribution procedures.
MPLS—Multiprotocol Label Switching. A switching method that forwards IP traffic using a label. This
label instructs the routers and the switches in the network where to forward the packets based on
preestablished IP routing information.
label instructs the routers and the switches in the network where to forward the packets based on
preestablished IP routing information.
PE router—provider edge router. A router that is part of a service provider's network connected to a
customer edge (CE) router. All MPLS VPN processing occurs in the PE router.
customer edge (CE) router. All MPLS VPN processing occurs in the PE router.
VCI—virtual channel identifier. A 16-bit field in the header of an ATM cell. The VCI, together with the
VPI, is used to identify the next destination of a cell as it passes through a series of ATM switches on its
way to its destination. ATM switches use the VPI/VCI fields to identify the next network VCL that a cell
needs to transit on its way to its final destination.
VPI, is used to identify the next destination of a cell as it passes through a series of ATM switches on its
way to its destination. ATM switches use the VPI/VCI fields to identify the next network VCL that a cell
needs to transit on its way to its final destination.
VCL—virtual channel link. A connection between two ATM devices.
VPI—virtual path identifier. An 8-bit field in the header of an ATM cell. The VPI, together with the VCI,
identifies the next destination of a cell as it passes through a series of ATM switches on its way to its
destination. ATM switches use the VPI/VCI fields to identify the next VCL that a cell needs to transit
on its way to its final destination.
identifies the next destination of a cell as it passes through a series of ATM switches on its way to its
destination. ATM switches use the VPI/VCI fields to identify the next VCL that a cell needs to transit
on its way to its final destination.
VPN—virtual private network. Enables IP traffic to use tunneling to travel securely over a public TCP/IP
network.
network.
VRF—VPN routing and forwarding instance. An instance that consists of an IP routing table, a derived
forwarding table, a set of interfaces that use the forwarding table, and a set of rules and routing protocols
that determine what goes into the forwarding table.
forwarding table, a set of interfaces that use the forwarding table, and a set of rules and routing protocols
that determine what goes into the forwarding table.