User`s manual

PT-G7509 User’s Manual Featured Functions

3-24

Private MIB information

Switch Object ID

Setting Description Factory Default

8691.7.32

This indicates the PT-G7509’s enterprise

value.

Fixed

NOTE: The Switch Object ID cannot be changed.

Using Communication Redundancy

Communication redundancy on your network helps protect critical links against failure, protects

against network loops, and keeps network downtime at a minimum.

Communication redundancy functions allow the user to set up redundant loops in the network to

provide a backup data transmission route in the event that a cable is inadvertently disconnected or

damaged. This is a particularly important feature for industrial applications, since it could take

several minutes to locate the disconnected or severed cable. For example, if the PT-G7509 is used

as a key communications component of a production line, several minutes of downtime can result

in a big loss in production and revenue. The PT-G7509 supports four different protocols for

communication redundancy—Rapid Spanning Tree Protocol (IEEE-802.1w) and Turbo Ring,

Turbo Ring V2, and Turbo Chain.

When configuring a redundant ring, all switches on the same ring must be configured using the

same redundancy protocol. You cannot mix the Turbo Ring, Turbo Ring V2, and STP/RSTP

protocols within a ring. The following table lists the key differences between each feature. Use this

information to evaluate each the benefits of each, and then determine which features are most

suitable for your network.

Turbo Ring

Turbo Ring Turbo Chain STP RSTP

Topology Ring Ring Ring, Mesh Ring, Mesh Ring, Mesh

Recovery Time < 20 ms < 300 ms < 20ms Up to 30 sec. Up to 5 sec

NOTE

Most managed switches by Moxa support two proprietary Turbo Ring protocols:

y Turbo Ring refers to the original version of Moxa’s proprietary redundant ring protocol,

which has a recovery time of under 300 ms.

y Turbo Ring V2 refers to the new generation Turbo Ring, which has a recovery time of under

20 ms.