Procedure 9-5: Establish single-homed network
Overview
Use this procedure to establish single-homed OC-3/12/48 access to host Alcatel-Lucent 1665 DMXtend nodes in a network backbone ring.
Figure 9-5, Single-homed configuration example shows an example network configuration with single-homed access to a network backbone ring. This allows the single-homed ring to be completed through the network backbone ring. The UPSR backbone ring transports/drops traffic from the single-homed ring. The end-of-path network elements that drop the traffic perform path protection switching.
This procedure assumes that single-homed access is established by interconnecting Alcatel-Lucent 1665 DMXtend nodes using a Function/Growth slot pair at the host Alcatel-Lucent 1665 DMXtend node and the OC-3/12/48 Main slot pair of the Alcatel-Lucent 1665 DMXtend nodes in the single-homed ring. However, the Function/Growth slot pair of the host Alcatel-Lucent 1665 DMXtend node may also be connected in a single-homed ring with the following:
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Alcatel-Lucent 1665 DMX (OC-3/12/48 Main slot pair or Function/Growth slot pair): If connecting to an Alcatel-Lucent 1665 DMX, refer to the Alcatel-Lucent 1665 Data Multiplexer (DMX) User Operations Guide, 365-372-301, as required, when performing this procedure.
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Alcatel-Lucent 1850 TSS-5 (OC-3/12 Main slot pair): If connecting to an Alcatel-Lucent 1850 TSS-5, refer to the Alcatel-Lucent 1850 Transport Service Switch (TSS-5) User Provisioning Guide, 365-372-401, as required, when performing this procedure.
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Alcatel-Lucent 1665 DMXplore using OC-3/12 Main slot pair. If connecting to an Alcatel-Lucent 1665 DMXplore, refer to the Alcatel-Lucent 1665 Data Multiplexer Explore (DMXplore) User Operations Guide, 365-372-332, as required, when performing this procedure.
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Alcatel-Lucent 1665 DMXtend (OC-3/12/48 Function/Growth slot pair): If connecting to the Function/Growth slots of another Alcatel-Lucent 1665 DMXtend, refer to Procedure 9-7: Establish subtending low-speed UPSR, as required, when performing this procedure.
Important!
Single-homed access is supported at the host Alcatel-Lucent 1665 DMXtend nodes using UPSR port applications and UNSWITCHED cross-connection channel applications. This configuration is essentially the same as establishing a subtending UPSR ring [ Procedure 9-7: Establish subtending low-speed UPSR], except for the cross-connection applications.
Ignore all alarms until procedure is complete.
Privilege level
You must log in as either a Privileged user to complete this procedure.
Required equipment
In addition to the equipment listed in Required equipment, the following equipment is also required:
Before you begin
Prior to performing this procedure:
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Refer to Before you begin and Required equipment in this chapter.
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Refer to Laser safety and Electrostatic discharge in Chapter 1, Safety.
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Verify that you have the necessary work instructions detailing the slots, circuit packs, ports, and network element parameters to be used for this procedure.
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Verify that the network backbone ring containing the host Alcatel-Lucent 1665 DMXtend nodes is established and operating properly using the procedures in this manual.
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Verify that all systems being connected to the host Alcatel-Lucent 1665 DMXtend nodes have been equipped and are operating properly.
Steps
Complete the following steps to establish single-homed OC-3/12/48 access to host Alcatel-Lucent 1665 DMXtend nodes in a network backbone ring.
1 |
From your work instructions, determine the network configuration. Refer to Figure 9-5, Single-homed configuration example for an example. If possible, make a sketch of the existing network backbone ring and the required single-homed connections. If required, select the Administration → OSI Neighbor Map command at the host Alcatel-Lucent 1665 DMXtend node and note the NEs connected to Main 1 and Main 2. Access each NE identified, select the Administration → OSI Neighbor Map command, and note the NEs connected to Main 1 and Main 2. Repeat this step until the network backbone ring can be sketched. | ||||||||
2 |
Important! Two or more shelves in the same network cannot have the same TID. Using the work instructions and office records, verify that no duplicate TID settings exist between the nodes in the existing network backbone ring and the single-homed ring. If duplicate TID settings exist, determine new settings and at each site with duplicate TID settings, select Administration → Set TID from the System View menu, and enter new TID settings. Reference: Procedure 7-11: Set/change system TID | ||||||||
3 |
If required, modify the network service access point (NSAP) address and/or enable Level 2 routing capabilities at the host Alcatel-Lucent 1665 DMXtend node and the nodes in the single-homed ring. Reference: Procedure 7-13: Provision network layer 3 parameters | ||||||||
4 |
At the host Alcatel-Lucent 1665 DMXtend node, refer to Nodes 2 and 5 in Figure 9-5, Single-homed configuration example, verify/install OLIU circuit packs and/or pluggable transmission modules in the Function/Growth slot pair (D1 and D2, or G1 and G2) being used for access according to the work instructions. Important! If the work instructions or office records do not specify OLIU types, refer to Alcatel-Lucent 1665 Data Multiplexer Extend (DMXtend) Applications and Planning Guide, 365-372-324, for a description of OLIU circuit packs, pluggable transmission modules, and applications. Optical line power measurements and/or office records must be used to verify that the span length can be supported. The single-homed ring connections to the host Alcatel-Lucent 1665 DMXtend node must be in two slots in the same Function/Growth group (for example: D1 and D2). Reference: | ||||||||
5 |
Important! If OSI over DCC is enabled for ports, an inconsistent DCC values alarm is reported when the ports are looped back. If required at the host Alcatel-Lucent 1665 DMXtend node, clear the inconsistent DCC values alarm by disabling OSI over DCC for the required ports. From the System View menu, select Configuration → DCC Terminations and disable OSI Over DCC for the required DCC ports. Reference: Procedure 6-4: Provision DCC terminations | ||||||||
6 |
Important! For single-homed access, provision the Application parameter to UPSR for the low-speed OC-n port pairs being connected. From the System View menu at the host Alcatel-Lucent 1665 DMXtend node, select Configuration → Equipment, select the required low-speed OC-n ports, and provision the port parameters according to the work instructions. Reference: Procedure 4-4: Provision OLIU circuit packs/ports for service | ||||||||
7 |
At the host Alcatel-Lucent 1665 DMXtend node, verify that the low-speed OC-n ports were provisioned correctly using the View → Equipment command. | ||||||||
8 |
Important! If OSI over DCC is enabled, the LAPD Role parameter must be provisioned differently at each end of an optical span. For example, if the LAPD Role parameter is provisioned to user-side at one end of an optical span, then the LAPD Role parameter must be provisioned network-side at the other end of the optical span. From the System View menu at the Alcatel-Lucent 1665 DMXtend host node, select Configuration → DCC Terminations and provision the DCC terminations for the required DCC ports according to the work instructions. Result: If OSI over DCC is enabled, an inconsistent DCC values alarm will occur if the OC-n ports are looped back. Reference: Procedure 6-4: Provision DCC terminations | ||||||||
9 |
From the System View menu at the host Alcatel-Lucent 1665 DMXtend node, select View → DCC Terminations and verify that the DCC terminations were provisioned correctly. | ||||||||
10 |
At each node in the single-homed ring, provision the required Main/Function/Growth ports, DCC terminations, synchronization, and remote NE status functions according to the work instructions.
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11 |
Beginning at the host Alcatel-Lucent 1665 DMXtend node, connect the fibers between the required low-speed OC-n port in Function/Growth slot 1 and the required OC-n port in Main/Function/Growth slot 1 at the adjacent node and verify the integrity of the optical span being established. Example Figure 9-5, Single-homed configuration example shows the following single-homed connections at the host Alcatel-Lucent 1665 DMXtend node:
Reference: Procedure 14-4: Perform connection and verification of optical facility | ||||||||
12 |
Perform end-to-end optical line test on the span being established. Reference:
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13 |
Continue around the single-homed ring in the same direction until all nodes are connected.
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14 |
At each node in the single-homed ring, click the Alarm List button and verify that no alarms are present. If required, clear any alarms that are present. Reference: Alcatel-Lucent 1665 Data Multiplexer Extend (DMXtend) Alarm Messages and Trouble Clearing Guide, 365-372-326 | ||||||||
15 |
If required, repeat this procedure from Step 1 to establish single-homed access at another host Alcatel-Lucent 1665 DMXtend node in the network backbone ring. | ||||||||
16 |
Important! Establishing service requires that the proper slots in each terminating node be properly equipped with the correct circuit pack(s) for the type of service being established. It also requires numerous cross-connections in each of the nodes representing the path of the required service. Additionally, transmission tests should be performed to verify the continuity and quality of the established circuit. The single-homed access network is now ready for initial service to be established. Reference: End of steps |
Configuration
The example in Figure 9-5, Single-homed configuration example shows an Alcatel-Lucent 1665 DMXtend backbone ring consisting of Nodes 1, 2, 4, and 5 with single-homed Nodes 7 and 8.
The host Alcatel-Lucent 1665 DMXtend nodes support OC-3/12/48 single-homed access in Function slots D or G only.
The single-homed nodes could be one or more Alcatel-Lucent 1665 DMXtend, Alcatel-Lucent 1665 DMX, Alcatel-Lucent 1850 TSS-5, Alcatel-Lucent 1665 DMXplore, and/or any system supporting OC-3/12/48 configurations.
At the host Alcatel-Lucent 1665 DMXtend nodes, the port Application parameter for the low-speed OC-n ports that connect to the single-homed nodes (Node 5:D1/D2, Node 2:D1/D2) must be provisioned UPSR and the cross-connection channel application must be Unswitched.
Traffic Flow
In the following figure, if Node 7 is the source and Node 8 is the destination, traffic will flow as follows when the proper cross-connections are made:
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From Node 7 MAIN 1 to Node 5 D1, then clockwise around the ring from Node 5 MAIN 1 to Node 2 MAIN 2. From Node 2 D2 to Node 8 MAIN 2.
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From Node 7 MAIN 2 to Node 5 D2, then counter-clockwise around the ring from Node 5 MAIN 2 to Node 2 MAIN 1. From Node 2 D1 to Node 8 MAIN 1.
Protection
The single-homed configuration transports traffic through the network backbone ring without any protection switching by the host nodes (Node 5 and Node 2) or pass-through nodes on the network backbone ring. The UPSR terminating nodes (Node 7 and Node 8) perform path protection switching.
Figure 9-5: Single-homed configuration example
