In a chain
network, an NE can protect a service in different sections of the fiber after a
linear MS protection subnet is created.
Prerequisites
A You must be an
NM user with NE and network maintainer authority or higher.
B The NE data
must be configured, and fibers must be properly created.
Context
Fibers that are
related to a linear MSP cannot be used by other protection subnets. That is, a linear
MSP and other subnets cannot create virtual fibers together.
Procedure
Step 1 Choose Service > SDH Protection Subnet >
Create 1+1 Linear MSP from the Main Menu to display the Create Protection Subnet dialog box.
NOTE
To
create a M:N linear MS protection scheme, choose Service > SDH Protection
Subnet > Create M:N Linear MSP from the Main Menu to display the related
dialog box.
Step 2 Enter the name of the protection subnet.
The default name
is usually used, for example, 1+1_MSP_1.
Step 3 Select the rate of the protection subnet, for example, STM-4.
Step 4 Set Revertive Mode and Switching Mode based on the protection
type and requirements.
NOTE
1 For M:N linear
MS protection scheme, set the number of working links to N. M indicates the
number of protection links and cannot be set. Currently, the value is 1 only.
2 Revertive Mode
refers to the handling strategy adopted after the faulty line recovers to
normal.
3 Non-Revertive:
The service does not automatically revert to the working channel after the
faulty line recovers to normal.
4 Revertive: The
service automatically reverts to the working channel after the faulty line
recovers to normal.
5 Switching Mode
refers to the switching strategy adopted after a fault occurs to the line.
6 Single-ended
switching: To protect services, switching occurs at the receive end when the
receive end is faulty and at the transmit end when the transmit end is faulty.
7 Dual-ended
switching: To protect services, the switching occurs at the receive and
transmit ends when either end is faulty.
8 If multiple
protection subnets uses one port of a board, you need to check the Resource
Sharing check box.
If different
protection subnets use different ports of a board, do not check this check box.
9 Select the
Assigned by VC4 option when there are different VC4s belonging to different
protection subnets to achieve MSP only in some channels protection. For
example, for an STM-16 fiber, the VC4s 1-4 belong to an STM-4 MSP, and VC4s 5-8
belong to a PP.
Step 5 Add nodes to the protection subnet to be created. Double-click the NE
on the Main Topology to add it to the node list in the left-hand pane.
Meanwhile, is displayed on the NE icon. If you want to cancel the selection,
double-click the NE again.
Step 6 Click Next to proceed to the Select Link of the wizard. Set the Physical
Link Information of Working Link and Protection Link.
Step 7 Click Finish to deliver the
configuration data. The Operation Result
prompt box is displayed. Click Close.
Step 8 Right-click the protection subnet and choose Protection Subnet Attributes from the shortcut menu.
Step 9 Click the Protection Subnet
Maintenance tab to check whether the protocol controller starts. If not, do
as follows:
1. Select all the
NEs of the protection subnet.
2. Right-click
and choose Start/Stop Protocol > Start from the shortcut menu.
3. Click Yes in the dialog box that is displayed
twice. Ensure that the status of all the values in the Protocol Controller column is Protocol
Started.
Step 10 Click the Protection Subnet
Parameters tab and set the WTR time
and SD condition as needed. Click Apply to deliver the configuration.
NOTE
The WTR time of all NEs in the same
protection subnet should be the same.
----End
没有评论:
发表评论