Interaction With Other Features; Spanning Tree; Vlan Stacking; Ethernet Oam - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Interaction With Other Features

Interaction With Other Features
This section contains important information about ERP's interaction 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.
•
Maximum number of Protected VLANs supported is 252.
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 should 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 14-16

Ethernet OAM

ERP ring ports can be configured to accept a loss of connectivity event for a Remote Ethernet OAM Main-
tenance End Point (MEP). See
for more information.
page 14-8
"Monitoring Remote Ethernet OAM End Points with ERP" on page 14-15
OmniSwitch AOS Release 6 Network Configuration Guide
Configuring ERP
for more information.
September 2009