Bedienungsanleitung Netgear GS108Tv2 (Seite 294 von 302) (Englisch)

710751

294

Zoom out

Zoom in

Vorherige Seite

1/302

Nächste Seite

GS108T and GS110TP Smart Switch Software Administration Manual

B-16 Configuration Examples

v1.0, April 2010

The MSTP algorithm and protocol provides simple and full connectivity for frames assigned to

any given VLAN throughout a Bridged LAN comprising arbitrarily interconnected networking

devices, each operating MSTP, STP or RSTP. MSTP allows frames assigned to different VLANs

to follow separate paths, each based on an independent Multiple Spanning Tree Instance (MSTI),

within Multiple Spanning Tree (MST) Regions composed of LANs and or MSTP Bridges. These

Regions and the other Bridges and LANs are connected into a single Common Spanning Tree

(CST). [IEEE DRAFT P802.1s/D13]

MSTP connects all Bridges and LANs with a single Common and Internal Spanning Tree (CIST).

The CIST supports the automatic determination of each MST region, choosing its maximum

possible extent. The connectivity calculated for the CIST provides the CST for interconnecting

these Regions, and an Internal Spanning Tree (IST) within each Region. MSTP ensures that

frames with a given VLAN ID are assigned to one and only one of the MSTIs or the IST within the

Region, that the assignment is consistent among all the networking devices in the Region and that

the stable connectivity of each MSTI and IST at the boundary of the Region matches that of the

CST. The stable active topology of the Bridged LAN with respect to frames consistently classified

as belonging to any given VLAN thus simply and fully connects all LANs and networking devices

throughout the network, though frames belonging to different VLANs can take different paths

within any Region, per IEEE DRAFT P802.1s/D13.

All bridges, whether they use STP, RSTP or MSTP, send information in configuration messages

via Bridge Protocol Data Units (BPDUs) to assign port roles that determine each port’s

participation in a fully and simply connected active topology based on one or more spanning trees.

The information communicated is known as the spanning tree priority vector. The BPDU structure

for each of these different protocols is different. A MSTP bridge will transmit the appropriate

BPDU depending on the received type of BPDU from a particular port.

An MST Region comprises of one or more MSTP Bridges with the same MST Configuration

Identifier, using the same MSTIs, and which have no Bridges attached that cannot receive and

transmit MSTP BPDUs. The MST Configuration Identifier has the following components:

1. Configuration Identifier Format Selector

2. Configuration Name

3. Configuration Revision Level

4. Configuration Digest: 16-byte signature of type HMAC-MD5 created from the MST

Configuration Table (a VLAN ID to MSTID mapping)

As there are Multiple Instances of Spanning Tree, there is a MSTP state maintained on a per-port,

per-instance basis (or on a per port per VLAN basis: as any VLAN can be in one and only one

MSTI or CIST). For example, port A can be forwarding for instance 1 while discarding for

instance 2. The port states have changed since IEEE 802.1D specification.

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Netgear GS108Tv2 Seite 294

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Netgear GS108Tv2

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info