User`s manual

EDS-P510 Series Featured Functions
3-34
The “Ports Status” indicators show Forwarding for normal transmission, Blocked if this port is connected to
the Tail port as a backup path and the path is blocked, and Link down if there is no connection.
Explanation of “Settings” Items
Redundancy Protocol
Setting Description Factory Default
Turbo Ring Select this item to change to the Turbo Ring configuration page.
Turbo Ring V2 Select this item to change to the Turbo Ring V2 configuration
page.
Turbo Chain Select this item to change to the Turbo Chain configuration
page
RSTP (IEEE
802.1W/1D)
Select this item to change to the RSTP configuration page.
None Ring redundancy is not active
None
Role
Setting Description Factory Default
Head Select this EDS as Head Switch
Member Select this EDS as Member Switch
Tail Select this EDS as Tail Switch
Member
Head Role
Setting Description Factory Default
Head Port Select any port of the EDS to be the head port. port G2
Member Port Select any port of the EDS to be the member port. port G3
Member Role
Setting Description Factory Default
1st Member port Select any port of the EDS to be the 1st member port port G2
2nd Member port Select any port of the EDS to be the 2nd member port port G3
Tail Role
Setting Description Factory Default
Tail Port Select any port of the EDS to be the tail port. port G2
Member Port Select any port of the EDS to be the member port. port G3
The STP/RSTP Concept
Spanning Tree Protocol (STP) was designed to help reduce link failures in a network, and provide protection
from loops. Networks that have a complicated architecture are prone to broadcast storms caused by
unintended loops in the network. Moxa EDS-P510’s STP feature is disabled by default. To be completely
effective, you must enable RSTP/STP on every EDS-P510 connected to your network.
Rapid Spanning Tree Protocol (RSTP) implements the Spanning Tree Algorithm and Protocol defined by IEEE
Std 802.1w-2001. RSTP provides the following benefits:
• The topology of a bridged network will be determined much more quickly compared to STP.
• RSTP is backward compatible with STP, making it relatively easy to deploy. For example:
Defaults to sending 802.1D style BPDUs if packets with this format are received.
STP (802.1D) and RSTP (802.1w) can operate on different ports of the same EDS-P510. This feature is
particularly helpful when EDS-P510 ports connect to older equipment, such as legacy switches.
You get essentially the same functionality with RSTP and STP. To see how the two systems differ, see the
Differences between RSTP and STP section in this chapter.