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S2989G-24TX Operation Manual

Chapter 7 Reliability Configuration

7-48

packet but not the user business packet; it improves the security of ERPS protocol.

User ensures the uniqueness of the configuration. This VLAN is as the vlan tag

when sending R-APS packet. In the instance, the protection VLAN configuration of

all nodes must be consistent.

We suggest the port which user configured on ERPS node is trunk port and ensure

that the vlan and control vlan that data packet is in are in the protection instance

and ERPS only protect the data and protocol packet in the instance. For instance,

the switch enables a protocol (CFM, EFM, Layer3 interface) and it makes the

switch send the protocol packet out. Then, if the vlan ID which sends the packet is

not in the protection instance, there will be the loop in the topology.

If configure the port status test method as fastlink, the hardware must support

fastlink function. Break off the notification of port status changing; disable the mac

soft study function at the same time.

If it is configured associating with CFM, the hardware must support CC function

and it can achieve the ability of CCM sending packet in 3.3ms.