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NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access 01

This is NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access
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Terminology for ERPS

Terminology for ERPS

Terms

Term

Description

FDB

Forwarding database. A collection of entries for guiding data forwarding. There are Layer 2 FDB and Layer 3 FDB. The Layer 2 FDB refers to the MAC table, which provides information about MAC addresses and outbound interfaces and guides Layer 2 forwarding. The Layer 3 FDB refers to the ARP table, which provides information about IP addresses and outbound interfaces and guides Layer 3 forwarding.

MSTP

Multiple Spanning Tree Protocol. A new spanning tree protocol defined in IEEE 802.1s. MSTP uses the concepts of region and instance. Based on different requirements, MSTP divides a large network into regions where instances are created. These instances are mapped to VLANs. BPDUs with region and instance information are transmitted between bridges. A bridge determines which domain it belongs to based on the information carried in BPDUs.

RSTP

Rapid Spanning Tree Protocol. A protocol defined in IEEE 802.1w which is released in 2001. RSTP is the amendment and supplementation to STP, implementing rapid convergence.

STP

Spanning Tree Protocol (STP). A protocol defined in IEEE 802.1d which is released in 1998. This protocol is used to eliminate loops on a LAN. The routers running STP detect loops on the network by exchanging information with each other, and block specified interfaces to eliminate loops.

Acronyms and Abbreviations

Acronym and Abbreviation

Full Name

APS

Auto Protection Switching

ERPS

Ethernet Ring Protection Switch

FS

Forced Switch

MEL

Maintenance Entity Group Level

MS

Manual Switch

NR

No Request

NRRB

No Request, RPL Blocked

R-APS

Ring Auto Protection Switching

RPL

Ring Protection Link

SF

Signal Fail

WTB

Wait To Block

WTR

Wait To Restore

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Updated: 2019-01-02

Document ID: EDOC1100058405

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