Loss Of Test Packet (Lotp); Configuring Erp; Erp Domain; Fig. 8.38 Ring Recovery - Siemens S223 User Manual

User Manual
SURPASS hiD 6615 S223/S323 R1.5
8.9.2
8.9.3
8.9.3.1
A50010-Y3-C150-2-7619
Normal Node
3. Unblock the
port recovered
from Link Failure
2. Send RM Link
Normal Node
Up message
Ring Recovery
Fig. 8.38

Loss of Test Packet (LOTP)

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.

Configuring ERP

ERP Domain

To realize ERP, you should fist configure domain for ERP. To configure the domain, use
the following command.
Command
erp domain DOMAIN-ID
no erp domain { all | DOMAIN-ID}
To specify a description for configured domain, use the following command.
Command
erp description DOMAIN-ID
DESCRIPTION
Normal Node
2. Send RM Link Up message
S
1. Block RM Node of
secondary port
P
RM Node
Mode
Creates ERP domain.
DOMAIN-ID: control VLAN ID of domain <1-4094>
Bridge
Deletes ERP domain.
Mode
Bridge Specifies a description of domain.
UMN:CLI
Description
Description
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