PT-7728 User’s Manual
Featured Functions
3-17
1
st
Trap Community
Setting
Description
Factory Default
Max. 30 characters
This specifies the community string to use
for authentication.
Public
2nd Trap Server IP/Name
Setting
Description
Factory Default
IP or name
This specifies the IP address or name of
the secondary trap server used by your
network.
None
2nd Trap Community
Setting
Description
Factory Default
Max. 30 characters
This specifies the community string to use
for authentication.
Public
Private MIB information
Switch Object ID
Setting
Description
Factory Default
8691.7.13
This indicates the PT-7728’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-7728 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-7728 supports three different protocols for
communication redundancy—
Rapid Spanning Tree Protocol (IEEE-802.1w)
and
Turbo Ring
,
and
Turbo Ring V2
.
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 V2
Turbo Ring
STP
RSTP
Topology
Ring
Ring
Ring, Mesh
Ring, Mesh
Recovery Time
< 20 ms
< 300 ms
Up to 30 sec.
Up to 5 sec
