Alcatel-Lucent 5620 Troubleshooting Manual page 271

LAG
LAN
LDP
LLC
LSP
LSP path
M
MAC
Alcatel-Lucent 5620 Service Aware Manager, Release 6.1 R3
3HE 04244 AAAB Ed. 01
link aggregation group
A LAG increases the bandwidth available between two nodes by grouping
up to eight ports into one logical link. The aggregation of multiple physical
links allows for load sharing and offers seamless redundancy. If one of the
links fails, traffic is redistributed over the remaining links. A LAG supports
up to eight links. Up to 64 LAGs can be configured on a node.
local area network
A LAN is a group of computers or associated devices that share a common
communications line and typically share the resources of a single processor
or server within a small geographic area, for example, within an office
building.
label distribution protocol
LDP is a signaling protocol used for MPLS path setup and teardown. An
LDP is used by LSRs to indicate to other LSRs the meaning of labels used
to forward traffic. LDP is defined in RFC 3036.
logical link control
LLC is the upper sublayer of the ISO model data link layer. LLC governs
packet transmission as specified by IEEE 802.2.
label switched path
LSPs support MPLS functionality and allow network operators to perform
traffic engineering. There are two types of LSPs:
•
static LSP
A static LSP specifies a static path. All devices that the LSP traverses
must be configured manually with labels. No signaling is required.
•
dynamic LSP
A dynamic LSP is an LSP that is set up using a signaling protocol. The
signaling protocol allows labels to be assigned from an ingress router to
an egress router. Signaling is triggered by the ingress router. Only the
ingress router, and not the intermediate routers, are configured. Signaling
also facilitates path selection.
A LSP associated with an MPLS path. This path could be an actual route, or
a configured route. A configured route can be primary, secondary, or
standby. An LSP can have at most one actual route, one primary route, and
multiple standby or secondary routes.
media access control
MAC is a sublayer of the data link layer, defined in IEEE 802.2
specifications that accesses the LAN medium. The MAC layer handles the
recognition and identification of individual network devices. Every
computer and network node has a MAC address that is encoded in hardware.
Troubleshooting Guide
November 2008
Glossary
GL-7