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Interaction With Other Features
Interaction With Other Features
This section contains important information about interaction of ERP with other OmniSwitch features.
Refer to the specific chapter for each feature to get more detailed information about how to configure and
use the feature.
Spanning Tree
ERP has the following interactions with Spanning Tree.
•
Disabling Spanning Tree on the ring ports is required before changing the switch Spanning Tree oper-
ating mode from 1x1 to flat mode.
1X1 Mode
•
1X1 STP and ERP can co-exist on different ports on the same switch but not on the same VLAN-port
association (VPA). STP continues to operate as usual on non-ERP ring ports even for the ERP
Protected VLANs. On the ERP ring ports, the forwarding state is controlled by ERP.
Flat Mode
•
MSTP and ERP can co-exist on the same switch but are not supported on the same MSTI. ERP
Protected VLANs can not be part of the same MSTI as non-ERP Protected VLANs.
•
RSTP and ERP can co-exist on a node only if STP is disabled on ERP ports, the default-VLAN of ERP
ports is disabled, and ERP protected VLANs are not configured on non-ERP ports. Also, non-ERP
Protected VLANs must not be configured on ERP ports.
•
RRSTP and ERP cannot be configured on the same port.
VLAN Stacking
The VLAN Stacking application has the following interactions with ERP:
•
ERP is supported on Network Network Interface (NNI) ports; it is not supported on UNI ports.
•
Tunneling of STP BPDUs across ERP links is not supported. However, tunneling of STP BPDUs
across UNI ports is supported in a VLAN stacking configuration.
See
"Configuring ERP with VLAN Stacking NNIs" on page 9-14
page 9-8
OmniSwitch AOS Release 7 Network Configuration Guide
for more information.
Configuring ERP
March 2011
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