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PowerCube 500 System Configuration Guide (PC500-300H1, PC500-300G1, EG6P-150G1)

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
ERPS Management

ERPS Management

This topic describes the parameters that are used for Ethernet ring protection switching (ERPS) management.

Parameters

Parameter

Value Range

Default Value

Description

ERPS ID

1 to 8

-

This parameter indicates the ID of the ERPS instance.

East Port

-

-

This parameter indicates the east port of the ERPS instance.

West Port

-

-

This parameter indicates the west port of the ERPS instance.

ERP Ring Node Flag

-

-

  • This parameter indicates the ring port corresponding to ERP Ring Node Flag.

Flag Port

-

-

This parameter indicates the flag port of the ERPS instance.

Control VLAN

1 to 4094

-

  • This parameter indicates or specifies the VLAN ID of Control VLAN.
  • Each node on the Ethernet ring transmits the R-APS packets on the dedicated ring APS (R-APS) channel to ensure consistency between the nodes when the ERPS switching is performed. Control VLAN is used for isolating the dedicated R-APS channel. Therefore, the VLAN ID in Control VLAN cannot be duplicate with the VLAN IDs that are contained in the service packets or inband DCN packets.
  • The Control VLAN must be set to the same value for all the NEs on an ERPS ring.

Destination Node

01-19-A7-00-00-01

-

This parameter indicates the MAC address of the destination node. The default destination MAC address in the R-APS packets is always 01-19-A7-00-00-01.

Current Node

-

-

This parameter indicates the node that initiates a switching request.

Revertive Mode

Revertive

Non-Revertive

-

This parameter indicates the revertive mode and can be reset.

Compatible_Version

ver2

ver1

ver2

  • This parameter indicates the configured compatible ERPS protocol version and can be reset.
  • For multi-ring networks, Compatible_Version for all ring nodes must be ver2.
  • For single ring networks, Compatible_Version for ring nodes except the RPL owner can be either ver1 or ver2. Compatible_Version for the RPL owner must be ver2.

Virtual Channel Status

Enable

Disable

Enable

  • This parameter indicates the configured status and VLAN ID of an R-APS virtual channel, and can be reset.

Virtual Channel VLANs

1 to 4094

-

Major ERPS Ring ID

-

-

Set this parameter only for the sub-ring ERPS instance on an interconnection node to associate the sub-ring ERPS instance with the major ring ERPS instance.

Loop Detect

-

-

Specifies whether to detect loops on an ERPS ring.

ETH Type Domain

Transfer mode

Standard mode

Transfer mode

  • If an ERP ring consists of OptiX RTN and third-party equipment and the type domain in R-APS packets used by the third-party equipment is 0x8902, set ETH Type Domain to Standard mode (Ox8902) for the OptiX RTN equipment.
  • In other cases, retain the default value Transfer mode (Ox8809) for this parameter.

Hold-Off Time(ms)

0 to 10000, in steps of 100

0

  • This parameter indicates or specifies the hold-off time of the ERPS hold-off timer.
  • The hold-off timer is used for negotiating the protection switching sequence when the ERPS coexists with other protection schemes so that the fault can be rectified in the case of other protection switching (such as LAG protection) before the ERPS occurs. When a node on the ring detects one or more new faults, it starts up the hold-off timer if the preset hold-off time is set to a value that is not 0. During the hold-off time, the fault is not reported to trigger an ERPS. When the hold-off timer times out, the node checks the link status regardless whether the fault that triggers the startup of the timer exists. If the fault exists, the node reports it to trigger an ERPS. This fault can be the same as or different from the fault that triggers the initial startup of the hold-off timer.

Guard Time(ms)

10 to 10000, in steps of 10

2000

  • This parameter indicates or specifies the guard time of the ERPS guard timer.
  • The nodes on the ring continuously forward the R-APS packets to the Ethernet ring. As a result, the outdated R-APS packets may exist on the ring network. After a node on the ring receives the outdated R-APS packets, an incorrect ERPS may occur. The ERPS guard timer is an R-APS timer used for preventing a node on the ring from receiving outdated R-APS packets. When a faulty node on the ring detects that the switching condition is cleared, the node starts up the guard timer and starts to forward the R-APS (NR) packets. During this period, the R-APS packets received by the node are discarded. The received R-APS packets are forwarded only after the time of the guard timer expires.

WTR Time(mm:ss)

01:00, 02:00, 03:00, 04:00, 05:00, 06:00, 07:00, 08:00, 09:00, 10:00, 11:00, 12:00

05:00

  • This parameter indicates or specifies the WTR time of the WRT timer in the case of ERPS protection.
  • The WTR time refers to the duration from the time when the working channel is restored to the time when the switching is released. When the working channel is restored, the WTR timer of the RPL owner starts up. In addition, a signal that indicates the operation of the WTR timer is continuously output in the timing process. When the WTR timer times out and no switching request of a higher priority is received, the signal indicating the operation of the WTR timer is not transmitted. In addition, the WTR release signal is continuously output.
  • The WTR timer is used to prevent frequent switching caused by the unstable working channel.

Packet Transmit Interval(s)

1 to 10

5

This parameter displays or specifies the interval for sending R-APS packets periodically.

Entity Level

0 to 7

4

This parameter indicates or specifies the level of the maintenance entity.

Last Switching Request

-

-

This parameter indicates the last switching request.

RB Status

-

-

This parameter indicates the RB (RPL Blocked) status of the packets received by the working node.

  • noRB: The RPL is not blocked.
  • RB: The RPL is blocked.

DNF Status

-

-

This parameter indicates the DNF status of the packets received by the working node.

  • noDNF: The R-APS packets do not contain the DNF flag. In this case, the packets are forwarded by the node that detects the fault on a non-RPL link, and the node that receives the packets is requested to clear the forwarding address table.
  • DNF: The R-APS packets contain the DNF flags. In this case, the packets are forwarded by the node that detects the fault on an RPL link, and the node that receives the packets is informed not to clear the forwarding address table.

State Machine Status

-

-

This parameter indicates the status of the state machine at the working node.

  • Idle: The Ethernet ring is in normal state. For example, no node on the Ethernet ring detects any faults or receives the R_APS (NR, RB) packets.
  • Protection: The Ethernet ring is in protected state. For example, a fault on the node triggers the ERPS, or a node on the ring is in the WTR period after the fault is rectified.

MAC Address Carried in Packets

-

-

Displays the MAC address in the message received at the current node, that is, the MAC address of the source node of the switching request.

East Port Status

-

-

This parameter displays the status of the east port.

West Port Status

-

-

This parameter displays the status of the west port.

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Updated: 2019-04-26

Document ID: EDOC1100021621

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