- Title Page
- Table of Contents
- Preface
- Setting Up Devices and Using the GUI Clients
- Working with the Cisco Prime Network Vision Client
- Viewing and Managing NE Properties
- Device Configurations and Software Images
- Working with Prime Network Vision Maps
- Working with Links
- Labeling NEs Using Business Tags
- Working with the Prime Network Events
- Tracking Faults Using Prime Network Events
- Working with Tickets in Cisco Prime Network Vision
- Working with Reports
- Using Cisco PathTracer to Diagnose Problems
- Monitoring Carrier Ethernet Services
- Monitoring Carrier Grade NAT Properties
- Monitoring DWDM Properties
- Monitoring Ethernet Operations, Administration,and Maintenance Tool Properties
- Monitoring Y.1731 IPSLA Configuration
- IPv6 and IPv6 VPN over MPLS
- Monitoring MPLS Services
- Viewing IP and MPLS Multicast Configurations
- Monitoring MToP Services
- Viewing and Managing SBCs
- Monitoring AAA Configurations
- Monitoring IP Pools
- Monitoring BNG Configurations
- Monitoring Mobile Technologies
- Monitoring Data Center Configurations
- Icon and Button Reference
- Glossary
- Index
Monitoring BNG Configurations
These topics provide an overview of the Broadband Network Gateway (BNG) technology and describe how to monitor and view BNG configurations in Prime Network Vision:
•
Broadband Network Gateway (BNG) - An Overview
•User Roles Required to Work With BNG
•Working with BNG Configurations
Broadband Network Gateway (BNG) - An Overview
Broadband Network Gateway (BNG) provides capabilities that help to improve the service provider's ability to manage the subscriber's services, and simplify overall network operations. BNG is a functionality that comprises subscriber management at a logical aggregation point in the network, which manages the subscriber's user experience through identification, address assignment, authentication, authorization, accounting, and various other features such as security, Quality of Service (QoS), and subscriber forwarding.
BNG represents the subscriber as a session, which is a logical point to enable services for a given subscriber. A subscriber is usually identified with the protocol that provides the IP address of the subscriber for address assignment. For example, a subscriber that uses the Point-to-Point Protocol (PPP) to connect to the network, receives its IP address through the PPP IP Control Protocol (IPCP) negotiation, and is represented as a PPP session. A subscriber that uses Ethernet to connect to the network receives its IP address through Dynamic Host Control Protocol (DHCP) and is represented as an IP session.
The purpose of deploying BNG at the provider edge is to better manage and enrich the subscriber experience.
BNG separates subscriber access functions from provider services and yields these benefits:
•Comprehensive session management and billing functions are supported by means of communication with an authentication, authorization, and accounting (AAA) server that is separate from the BNG.
•Subscribers can obtain services based on their subscriber ID or a combination of their subscriber ID and access line.
The network topology for BNG can be explained using the following models:
•BNG Retail Model—The subscriber connects to the network over a digital subscriber line (DSL) circuit into a DSL access multiplexor (DSLAM), which aggregates a number of subscribers. The DSLAMs are connected to an aggregation network, which grooms the subscriber traffic and switches it to BNG. A sample of the retail model is shown in Figure 25-1.
Figure 25-1 BNG Retail Model
•BNG Wholesale Model—The subscriber's traffic is handed off by the carrier (who still owns the infrastructure) toone of the several Internet Service Providers (ISP). There are different ways to make this handoff, Layer 2 Tunneling Protocol (L2TP) or Layer 3 virtual private networking (VPN) being two such methods.
The BNG Retail model is used for deployment in Prime Network.
Prime Network provides BNG support for Cisco Aggregation Service Router (ASR) 9000 series network elements.
The following topics describe more about the BNG configuration details:
•User Roles Required to Work With BNG
•Working with BNG Configurations
User Roles Required to Work With BNG
This topic identifies the roles that are required to work with BNG. Prime Network determines whether you are authorized to perform a task as follows:
•For GUI-based tasks (tasks that do not affect elements), authorization is based on the default permission that is assigned to your user account.
•For element-based tasks (tasks that do affect elements), authorization is based on the default permission that is assigned to your account. That is, whether the element is in one of your assigned scopes and whether you meet the minimum security level for that scope.
For more information on user authorization, see the topic on device scopes in the Cisco Prime Network 3.10 Administrator Guide.
Working with BNG Configurations
This topic contains the following sections:
•View Broadband Access (BBA) Groups
•View Subscriber Access Points
•Diagnose Subscriber Access Points
•View Dynamic Host Configuration Protocol (DHCP) Service Profile
•View Dynamic Config Templates
•Viewing AAA Configurations in Prime Network Vision, page 23-2
View Broadband Access (BBA) Groups
BBA groups refer to the configuration settings applicable to a subscriber session that are accessing the network through an access interface. The same group can be applied to multiple access interfaces. For example, the maximum session limit for an access interface.
To view the BBA group profile:
Step 1 Right-click on the device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > BNG > BBA Groups. A list of BBA groups is displayed in the content pane as shown in Figure 25-2.
Figure 25-2 BBA Groups Content Pane
Step 3 Right-click on a group from the list and choose Properties. The BBA Group Properties dialog box is displayed.
Table 25-2 describes the fields that are displayed in the BBA Group Properties dialog box.
View Subscriber Access Points
Subscriber access points refer to the access interfaces that are named based on the parent interface. For example, bundle-ether 2.100.pppoe312. The subscribers on bundles (or bundle-VLANs) interfaces allow redundancy and are managed on the route processor (RP). However, the subscribers over physical interfaces are created and managed on the line card (LC) and are not redundant.
To view the subscriber access points profile:
Step 1 Right-click on the device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > BNG > Subscriber Access Points. A list of access points is displayed in the content pane.
Step 3 Right-click on an access point from the list and choose Properties. The Subscriber Access Point Properties dialog box is displayed.
Table 25-3 describes the fields that are displayed in the Subscriber Access Point Properties dialog box.
Diagnose Subscriber Access Points
The following commands can be launched from the inventory by right-clicking the BNG > Subscriber Access Points node and selecting the Commands > Diagnose option. Before executing any commands, you can preview them and view the results. If desired, you can also schedule the commands. To find out if a device supports these commands, see the Cisco Prime Network 3.10 Supported Cisco VNEs.
View Dynamic Host Configuration Protocol (DHCP) Service Profile
DHCP is used to automate host configuration by assigning IP addresses, delegating prefixes (in IPv6), and providing extensive configuration information to network computers.
DHCP has the capability to allocate IP addresses only for a specified period of time, which is known as the lease period. If a client device wants to retain the IP addresses for a period longer than the lease period, then the client must renew the lease before it expires. A client can renew the lease depending on the configuration time sent from the server. A REQUEST message is unicast by the client using the server's IP address. On receiving the REQUEST message, the server responds with an acknowledgment, and the client's lease is extended by the lease time configured in the acknowledgment message.
To view the DHCP service profile:
Step 1 Right-click on the required device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > DHCP Service > DHCP Profiles - IPv4. A list of DHCP profiles are displayed in the content pane as shown in Figure 25-3.
Figure 25-3 DHCP Profiles
Step 3 Right-click on a service from the list and choose Properties. The DHCP Profile Properties dialog box is displayed.
Table 25-5 describes the fields that are displayed in the DHCP Profile Properties dialog box.
View Dynamic Config Templates
A dynamic template is used to group configuration items, which are later applied to a group of subscribers. This template is globally configured through the command line interface (CLI). However, the template does not get applied to a subscriber interface as soon as it is configured. It must be activated using a control policy. Similarly, you must deactivate the template using a control policy to remove its association with the subscriber interface.
Ideally, you can activate more than one dynamic template on the same subscriber interface, for the same event or different events. The same dynamic-template can be activated on multiple subscriber interfaces through the same control policy.
Prime Network supports the following types of dynamic templates:
•IP subscriber templates
•PPP templates
•Service templates
To view the configuration templates:
Step 1 Right-click on the device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > Dynamic Config Templates > IP Subscriber Templates or PPP template or Service template. A list of templates is displayed in the content pane.
Step 3 Select a template from the list, right-click and choose Properties to view its details.
Table 25-6 describes the fields that are displayed in the corresponding dialog box.
Viewing the Settings for a PPP Template
In addition to the above details, you can also view the following settings for a PPP template:
•IPCP Settings
•LCP Settings
•Authentication Settings
•PPP Timeout Settings
To view the settings:
Step 1 Right-click on the device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > Dynamic Config Templates > PPP template. A list of templates is displayed in the content pane.
Step 3 Select a template from the list, right-click and choose Properties to view its details. You can click on the tab to view more details. The IPCP tab is displayed by default.
Table 25-7 describes the fields that are displayed in the corresponding dialog box.
Viewing Policy Container
The Policy Container node in the logical inventory lists all the available service groups and service policies that are associated with service templates, BBA groups, and subscriber access points.
To view the service group and service policy profiles:
Step 1 Right-click on the required device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > Policy Container. The Policies and Policy Group tabs are displayed in the content pane. In the Policies tab, a list of existing policies are displayed as shown in Figure 25-4.
Figure 25-4 Policy Container
Step 3 Click the Policy Group tab. A list of existing groups are displayed.
Step 4 Right-click on a group from the list and choose Properties. The Policy Group Properties dialog box is displayed.
Table 25-8 describes the fields that are displayed in the Policy Group Properties dialog box.
Step 5 Right-click on a policy from the Policies list and choose Properties. The Service Policy Properties dialog box is displayed.
Table 25-9 describes the fields that are displayed in the Service Policy Properties dialog box.
Viewing QoS Profile
QoS or Quality of services is the technique of prioritizing traffic flows and specifying preferences for forwarding packets with higher priority. The QoS node in the logical inventory lists all the services configured for the selected network element.
To view the QoS profile:
Step 1 Right-click on the device and choose the Inventory option.
Step 2 In the Inventory window, choose Logical Inventory > QoS > Class of Services. A list of existing policies are displayed in the content pane.
Step 3 Right-click on a service in the list and choose Properties. The Class of Services Properties dialog box is displayed. You can click on the tabs to view more details.
Table 25-10 describes the fields that are displayed in the Class of Services Properties dialog box.
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