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When configuring ERPS, pay attention to consider the following notes:
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- Sub-ring
- Configuration of revertive and non-revertive mode
- WTB timer
points:
- A maximum of eight ERPS rings (including both major ring and sub-ring) are supported on a device, and a maximum of two instances can be configured for each ring.
- Each The ERPS port must be a trunk port and .
- Before enabling ERPS, users need to disable spanning tree protocol on specific port.
- The VLAN on the ERPS port is either a Traffic from VLANs other than the control VLAN or a data VLAN , and traffic from other VLANs that do not belong to either will be blockeddropped by the ERPS ports.
- Make sure that the control VLAN and data VLANs of an ERPS ring have all been added to the MSTP instance (ERPS protected-instance) and VLAN mapping.
- When the ERPS ring instance is enabled, the traffic of MSTP instance 0 will be blocked.
- Control VLAN should be assigned as a tagged VLAN.
- Different ERPS ring instances cannot use the same control VLAN.
- The same control VLAN must be configured for all devices in the same ERPS ring instance.For scenarios of multiple physical rings
- with shared links, i.e., the intersected ring, in order to avoid loops, it is required that the same data VLAN cannot be configured to different physical ringsTo ensure the fast convergence of ERPS, it is recommended not to configure the intersecting link as an RPL link in the configuration of the intersecting ring.
- ERPS only works with MSTP, but not STP/RSTP/PVST.
- MLAG configuration on ERPS ring ports is not supported.
- On such deployments, where gateways are serving VLANs across the ring, VRRP is recommended.