In the Rewarning dialog box, click OK

Step 8 If the NE is successfully added, the new ring topology is displayed on the Topology tab in the Manage MPLS Protection Ring window. If the NE is not successfully added, the U2000 performs an automatic rollback to restore the MPLS protection ring.

NOTE

The westbound tunnel bandwidth reserved for the new NE inherits that for the adjacent east NE. The eastbound tunnel bandwidth reserved for the new NE inherits that for the adjacent west NE.

Step 9 Clear the switching on the ring. On the Topology tab, select a record and click East Maintenance/West Maintenance > Clear Switching.

NOTE

In this example, clear the switching on interface a1 on NE A or interface a2 on NE B for the ring.

----End

Follow-up Procedure

If the eastbound and westbound interfaces of the NE to be added are not correctly selected in step 5, service switching fails. In this case, refer to steps 3 to 5 in Deleting NEs from an MPLS Protection Ring for Capacity Expansion to delete the NE and then add the NE again for capacity expansion.

Perform connectivity detection on the MPLS protection ring.

1. Choose Service > IP Protection Subnet > Manage MPLS Protection Ring (traditional style) from the main menu or select Bearer Network Service Configuration in

Application Center and choose Protection Subnet > IP Protection Subnet > Manage MPLS Protection Ring (application style) from the main menu.

2. In the Set Filter Criteria dialog box, set the search criteria and click Filter to locate the MPLS protection ring to which the NE has been added.

3. Right-click the MPLS protection ring and choose Test and Check from the shortcut menu.

4. In the Test and Check dialog box, select the Ring Ping check box and click Run.

5. After the check is complete, click the ... button in Details. If the values of Sent Packets and Received Packets are the same, the MPLS protection ring is functioning properly.

7.4.2 Deleting NEs from an MPLS Protection Ring for Capacity Expansion

This topic describes how to delete NEs from an MPLS protection ring for capacity expansion.

On the live network, an NE and services accessed through the NE may need to be deleted because of base station deletion or removal. The U2000 provides the deletion function to facilitate the operations.

Usage scenario

A B

D C

E

NodeB RNC

GE 1/0/1 GE 1/0/2

Prerequisite

Before deleting NEs, perform the following operations in turn:

Oper ation Order

Operation

Content Description

1 Synchronization and backup

1. Synchronize NE data.

l In the Manage MPLS Protection Ring window, click Synchronization.

l In the Manage Tunnel window, click Synchronization.

2. Back up NE data. Choose Administration > NE Software Management > NE Data Backup/Restoration

(traditional style) from the main menu or select Fix-Network NE Software Management in Application Center and choose NE Software Management > NE Data Backup/Restoration (application style) from the main menu.

3. Enable the U2000 to automatically discover the tunnel service and MPLS protection ring. Choose Service >

Search for Service (traditional style) from the main menu or select Bearer Network Service Configuration in Application Center and choose Service > Search for Service (application style) from the main menu.

2 Service switching On the Topo tab, select the NE on which the port needs to be adjusted, right-click, and choose East Maintenance/West Maintenance > Force Switching from the shortcut menu.

Switch services on the MPLS protection ring to the counterpart of the link through which the NE to be deleted passes. In this way, services are carried over the protection path, without being interrupted.

NOTE

l Forcible switching is to forcibly switch services from the working path to the protection path or from the protection path to the working path, regardless of the MPLS protection ring status.

l In this example, NE E is to be added between NEs A and B. After NE E is deleted, the physical link is A-B. Perform a forcible switching on interface GE 1/0/1 on NE A or interface GE 1/0/4 on NE B for the ring.

3 Fiber

disconnection and connection

Before deleting the NE, properly connect the rest two NEs on the ring using a fiber.

Oper ation Order

Operation

Content Description

4 Interface IP setting Check whether the eastbound and westbound interface IP addresses of the deleted NE, westbound interface IP address of the adjacent east NE, and eastbound interface IP address of the adjacent west NE are configured on the same network segment. If not, correct them to the same network segment.

NOTE

If interface IP addresses are not configured, set the westbound interface IP address of the adjacent east NE and the eastbound interface IP address of the adjacent west NE to Unspecified. If you select an Ethernet interface on a PTN NE, perform the following operations: In the NE Explorer, choose Configuration > Interface Management > Ethernet Interface from the navigation tree. In the Ethernet Interface window, select an interface on the Layer 3 Attributes tab and set Specify IP Address to Unspecified.

5 Layer 2 or IP link configuration

Enable the U2000 to search for fibers and Layer 2 links and automatically allocate interface IP addresses. Note that IP or Layer 2 links must be configured before you delete NEs from the MPLS protection ring.

6 Check of Node ID for the NE to be deleted

Assume that Node ID for the NE to be deleted is X. Before deleting the NE, check whether other NEs using X as an intersecting node exist on the ring. If such NEs exist, clear intersecting node configurations to prevent NE deletion failures.

Context

l This operation is potentially service-affecting. Before performing this operation, contact Huawei engineers for guidance.

l This function applies only to the following types and versions of PTN, OSN, and Hybrid MSTP series NEs:

– PTN 910/PTN 910f/PTN950/PTN3900/PTN3900-8/PTN960: V100R003C02/

V100R005C00/V100R500C01 – OSN500/OSN550: V100R005C01

– Hybrid MSTP 3500/Hybrid MSTP 7500/Hybrid MSTP 7500II: V100R005C01 l NEs that are configured as virtual intersecting nodes on an MPLS protection ring cannot

be deleted.

l The MPLS protection ring consisting of only two NEs does not support NE deletion.

l When you delete an NE, the NEs connected to the NE must reuse original ports.

l The function of deleting NEs from an MPLS protection ring applies to only one ring at a time. If multiple rings exist, perform NE deletion operations on the rings one by one.

l The DCN domain where the NE to be deleted and the left and right NEs adjacent to the NE reside cannot be too large. It is recommended that the number of NEs managed by the same gateway NE be less than 128.

l During the process of deleting an NE, do not upload or synchronize configurations of related NEs on the ring.

l If one or more NEs other than the NEs to be deleted from an MPLS protection ring are offline, the NE deletion operations cannot be performed. If all NEs on the MPLS protection ring, except the NE to be deleted, are online, delete the NE in online mode when the NE is online and in offline mode when the NE is offline.

l The NE deletion will delete the bound MPLS protection ring, tunnels and tunnel protection groups that use the delete NE as the upper or lower ring node, PWE3 services carried over the tunnels, associated PWs in the VPLS service, and bindings between the tunnels and VRFs in the L3VPN service. Service interruption will occur, and the deleted configurations cannot be restored.

NOTE

During the process of deleting an NE, automatic deletion of a discrete protection group is unavailable.

Procedure

Step 1 Choose Service > IP Protection Subnet > Manage MPLS Protection Ring (traditional style) from the main menu or select Bearer Network Service Configuration in Application Center and choose Protection Subnet > IP Protection Subnet > Manage MPLS Protection Ring (application style) from the main menu.

Step 2 In the Set Filter Criteria dialog box, click Filter. The Manage MPLS Protection Ring dialog box is displayed.

Step 3 Optional: If the desired tunnel is not bound to any ring, use the TCAT to delete NEs from the tunnel for capacity expansion. For details, see iManager U2000 V100R009C00 Huawei TCAT User Guide. If the tunnel has been bound to a ring, go to step 4.

Step 4 On the Topo tab, select the NEs to be deleted in the MPLS protection ring topology view,