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play_arrow Overview
- play_arrow Working with Connectivity Services Director
- play_arrow Service View Tasks and Lifecycle Modes
- play_arrow Network Services Overview
play_arrow Getting Started With Connectivity Services Director
- play_arrow Understanding Connectivity Services Director System Administration and Preferences
play_arrow Working with the Dashboard
- play_arrow About the Dashboard
  - Understanding the Dashboard
- play_arrow Using the Dashboard
  - Using Dashboard Widgets
- play_arrow Dashboard Widget Reference
play_arrow Working in Build Mode
- play_arrow About Build Mode
  - Understanding Build Mode in Views Other than Service View of Connectivity Services Director
  - Understanding the Build Mode Tasks Pane in Views Other than Service View
- play_arrow Discovering Devices
- play_arrow Creating Custom Device Groups
  - Understanding Custom Device Groups
  - Creating Custom Device Groups
- play_arrow Configuring Quick Templates
  - Understanding Quick Templates
  - Configuring and Managing Quick Templates
- play_arrow Configuring Device Settings
- play_arrow Configuring Class of Service (CoS)
  - Understanding Class of Service (CoS) Profiles
  - Creating and Managing Wired CoS Profiles
- play_arrow Configuring Link Aggregation Groups (LAGs)
  - Understanding Link Aggregation
  - Managing and Creating a Link Aggregation Group
- play_arrow Managing Network Devices
play_arrow Building a Topology View of the Network
- play_arrow Downloading and Installing CSD-Topology
- play_arrow Configuring Topology Acquisition and Connectivity Between the CSD-Topology and Path Computation Clients
- play_arrow Accessing the Topology View of CSD-Topology
play_arrow Prestaging
- play_arrow Prestaging Devices Overview
- play_arrow Prestaging: Managing Devices and Device Roles
- play_arrow Prestaging: Managing IP Addresses
- play_arrow Device Configuration Prerequisites to Prestaging Examples
- play_arrow Prestaging Services
play_arrow Service Design: Working with Service Definitions
- play_arrow Service Design: Predefined Service Definitions
- play_arrow Service Design: Managing E-Line Service Definitions
- play_arrow Service Design: Managing E-LAN Service Definitions
- play_arrow Service Design: Managing IP Service Definitions
play_arrow Service Provisioning: Working with Customers
- play_arrow Service Provisioning: Managing Customers
play_arrow Working in Deploy Mode
- play_arrow About Deploy Mode
  - Understanding Deploy Mode in Views Other than Service View of Connectivity Services Director
  - Understanding the Deploy Mode Tasks Pane in Views Other than Service View
- play_arrow Deploying and Managing Device Configurations
- play_arrow Deploying and Managing Software Images
play_arrow Service Provisioning: Working with Service Orders
- play_arrow Service Provisioning: Viewing the Configured Services and Service Orders
- play_arrow Service Provisioning: Managing E-Line Service Orders
- play_arrow Service Provisioning: Managing E-LAN Service Orders
- play_arrow Service Provisioning: Managing IP Service Orders
- play_arrow Service Provisioning: Performing RFC 2544 Benchmark Testing
play_arrow Service Provisioning: Working with Services Deployment
- play_arrow Service Provisioning: Managing Deployed Services
play_arrow Auditing Services and Viewing Audit Results
- play_arrow Service Provisioning: Auditing Services
- play_arrow Troubleshooting Devices and Services
play_arrow Working in Monitor Mode
- play_arrow About Monitor Mode
  - Understanding Monitor Mode in Views Other than Service View of Connectivity Services Director
  - Understanding the Monitor Mode Tasks Pane in Views Other than Service View
- play_arrow Monitoring Traffic
- play_arrow Monitoring Devices
  - Comparing Device Statistics
  - Showing ARP Table Information
- play_arrow General Monitoring
- play_arrow Monitor Reference
- play_arrow Detecting and Examining the Health and Performance of Services
play_arrow Working in Fault Mode
- play_arrow About Fault Mode
  - About Fault Mode in All Views of Connectivity Services Director
  - Understanding the Tasks Pane in Fault Mode
- play_arrow Using Fault Mode
- play_arrow Fault Reference
play_arrow End-to-End Configuration Examples
- play_arrow Configuration Scenarios
play_arrow Working with Chassis View
- play_arrow Working with Devices
- play_arrow Managing CLI Configlets
play_arrow Managing Optical Interfaces, OTUs, ODUs, ILAs, and IPLCs on MX Series and PTX Series Routers
- play_arrow Overview of Optical Interfaces, OTUs, and ODUs
- play_arrow Overview of Optical ILAs and IPLCs
- play_arrow Configuring and Monitoring Optical Interfaces, OTUs, and ODUs
- play_arrow Configuring and Monitoring Optical Inline Amplifiers
- play_arrow Configuring and Monitoring Optical Integrated Photonic Line Cards
play_arrow Working with User Roles
- play_arrow Managing User Roles
  - Creating a User-Defined Role
  - Managing Roles
play_arrow Working with Tunnel Services
- play_arrow Tunnel Services Overview
- play_arrow Service Design and Provisioning: Managing and Deploying Tunnel Services
- play_arrow Monitoring and Troubleshooting Tunnel Services
play_arrow Appendix: Managing Network Activate Features Using the Older Version of Services Activation Director
- play_arrow Service Design: Working with E-Line, IP, and E-LAN Service Templates
- play_arrow Service Provisioning: Working with Threshold Alarm Profiles

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English

Configuring Connectivity for BGP-LS Topology Acquisition

date_range 17-Oct-23

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After you have successfully established a connection between the CSD-Topology and the network, you can configure topology acquisition using Border Gateway Protocol Link State (BGP-LS). For BGP-LS topology acquisition, you must configure both the CSD-Topology and the PCC routers.

Note:

We recommend that you use BGP-LS instead of IGP adjacency for the following reasons:

The OSPF and IS-IS databases have a lifetime timer, and if the OSPF or IS-IS neighbor is down, the OSPF or IS-IS database is not removed immediately, and the CSD-Topology will not be able to determine whether the topology is valid or not.
Using BGP-LS minimizes the risk of making the JunosVM a transit router between AS areas if the GRE metric is not properly configured.
Typically, the CSD-Topology is located in a NOC Data Center and multihops away from the backbone routers and MPLS TE routers.

Note:

If BGP-LS is used, JunosVM is configured to automatically accept any I-BGP session from, in this example, 0.0.0.0/0. However, you must verify that JunosVM is correctly configured and that it has IP reachability to the peering router.

Before you begin, complete the following tasks:

Verify IP connectivity between a switch (or router) and the x86 appliance on which CSD-Topology software is installed.
Make sure that PCEP is configured on each PE router in the network topology.

To configure BGP-LS topology acquisition, see:

Configuring BGP-LS Topology Acquisition on the CSD-Topology

To configure BGP-LS on the CSD-Topology for topology acquisition, perform the following configuration steps from the CSD-Topology JunosVM:

Initiate an SSH or telnet session to the JunosVM external IP or management IP address.
Specify the autonomous system (AS) number for the node (BGP peer).
```
[edit routing-options]
user@csd_topology_junosvm# set autonomous-system AS_number
```

Specify the BGP group name and type for the node.

content_copy zoom_out_map
[edit protocols bgp]
user@csd_topology_junosvm# set group group_1 type internal

Specify a description for the BGP group for the node.

content_copy zoom_out_map
[edit protocols bgp group group_1]
user@csd_topology_junosvm# set description “csd-topology BGP-TE Peering”

Specify the address of the local end of a BGP session.
This is the IP address for the JunosVM external IP address which is used to accept incoming connections to the JunosVM peer and to establish connections to the remote peer.
```
[edit protocols bgp group group_1]
user@csd_topology_junosvm# set local-address <junosVM IP address>
```

Enable the traffic engineering features for the BGP routing protocol.

content_copy zoom_out_map
[edit protocols bgp group group_1]
user@csd_topology_junosvm# set family traffic-engineering unicast

Specify the IP address for the neighbor router that connects with the CSD-Topology.
```
[edit protocols bgp group group_1]
user@csd_topology_junosvm# set neighbor <router loopback IP address>
```
Note:
You can specify the router loopback address if it is reachable by the BGP peer on the other end. But for loopback to be reachable, usually some IGP has to be enabled between the CSD-Topology JunosVM and the peer on the other end.

Configuring Topology Acquisition on the PCC Routers

To enable the CSD-Topology to discover the network, you must add the following configuration on each each router that peers with the CSD-Topology. The CSD-Topology JunosVM must peer with at least one router from each area (autonomous system).

To configure topology acquisition, initiate a telnet session to each PCC router and add the following configuration:

Configure a policy.

content_copy zoom_out_map
[edit policy-options]
user@PE1# set policy-statement TE term 1 from family traffic-engineering 
user@PE1# set policy-statement TE term 1 then accept 

Note:

This configuration is appropriate for both OSPF and IS-IS.

Import the routes into the traffic-engineering database.

content_copy zoom_out_map
[edit protocols mpls traffic-engineering database]
user@PE1# set import policy TE 

Configure a BGP group by specifying the IP address of the router that peers with the CSD-Topology as the local address (typically the loopback address) and the JunosVM external IP address as the neighbor.

content_copy zoom_out_map
[edit routing-options]
user@PE1# set autonomous-system AS Number 
[edit protocols bgp group bgp group1]
user@PE1# set type internal 
user@PE1# set description “CSD-Topology BGP-TE Peering” 
user@PE1# set local-address <router-IP-address> 
user@PE1# set family traffic-engineering unicast 
user@PE1# set export TE 
user@PE1# set neighbor <JunosVM IP-address> 

arrow_backward PREVIOUS Configuring PCEP on a PE Router (from CLI)

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Connectivity Services Director User Guide

ON THIS PAGE

Configuring Connectivity for BGP-LS Topology Acquisition

Configuring BGP-LS Topology Acquisition on the CSD-Topology

Configuring Topology Acquisition on the PCC Routers

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Connectivity Services Director User Guide

ON THIS PAGE

Configuring Connectivity for BGP-LS Topology Acquisition

Configuring BGP-LS Topology Acquisition on the CSD-Topology

Configuring Topology Acquisition on the PCC Routers

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