Siemens S223 User Manual

User Manual                                                                               UMN:CLI 
SURPASS hiD 6615 S223/S323 R1.5 

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3. Unblock the 
port recovered 
from Link Failure

2. Send RM Link Up message

2. Send RM Link 

Up message

1. Block RM Node of 

secondary port

 

Ring Recovery 

 

ERP recognizes the Link Failure using Loss of Test Packet (LOTP). RM Node regularly 
sends RM Test Packet message. If the message is not retransmitted to RM Node through 
Ethernet Ring, it means that Loop doesn’t occur. Therefore, RM Node unblocks Secon-
dary port. The condition that RM Test Packet from RM Node doesn’t return is LOTP state. 

On the other hand, if RM Test Packet is retransmitted to RM Note through Ethernet Ring, 
Loop may occur. In this condition, RM Node blocks Secondary port. 

 

 

To realize ERP, you should fist configure domain for ERP. To configure the domain, use 
the following command. 

 DOMAIN-ID 

Creates ERP domain. 
DOMAIN-ID: control VLAN ID of domain <1-4094> 

 {all | DOMAIN-ID}

Bridge 

Deletes ERP domain. 

 

To specify a description for configured domain, use the following command. 

erp description DOMAIN-ID 

 

Bridge 

Specifies a description of domain.