User Manual Managed Switches
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3.6.2.3 Dual Homing Configuration
Dual Homing provides a redundant connection between an O-Ring network and an RSTP network.
For a Dual Homing connection on any two switches inside of the O-Ring network a Homing port
needs to be selected and enabled. Each configured Homing port must be connected to a RSTP
enabled port on any switch of the RSTP network. Configure RSTP port being of type Point-to-Point
(for switch interconnections). Do not configure as RSTP Edge Port (used for host connections). Dual
Homing ports bypass BPDU packets sent from RSTP network switches resulting in normal state in a
forwarding and blocked (discarding) line. In case of a ring failure or if the forwarding line will be
interrupted, bypassing of BPDU packets will be stopped triggering a network topology change of the
RSTP network and both Dual Homing connections will become forwarding lines.
NOTE:
Only for two switches of an O-Ring network the Homing port may be enabled. Ensure that the
connected network is RSTP enabled.
3.6
.2.4 Configuring “O-Ring”
Use the
O-Ring
page of the Redundancy menu.
1. Select
Enable
in field
Ring Redundancy.
2. If only a redundancy with 1 ring shall be created then do following:
•
Activate checkbox ‘
Set as Ring
Master’
if the switch shall be assigned as ring master
For O-Ring configuration
one switch
needs to be configured as Ring Master. However, if
two or more switches are set as Ring Master, the switch with the lowest MAC address will be
the actual Ring Master and the others will be Backup Masters.
If O-Ring redundancy on involved switches will be configured and applied but without setting
any switch as Ring Master, then a loop will arise causing heavy data traffic when closing the
