Create Policies For Class Of Service Or For Upgrading Cable Modem Cisco Ios Images; Cnr Steps To Support Subinterfaces - Cisco 7246VXR - uBR Router Software Configuration Manual

Universal broadband router

Table of Contents

Chapter 7

Overview of the Cisco Network Registrar for the Cisco uBR7200 Series

Create Policies for Class of Service or for Upgrading Cable

Modem Cisco IOS Images

To support Class of Service (CoS), define:

•

To assign the CoS or use Option82, make a client entry with a MAC address and point to the appropriate

policy. To use client-based MAC provisioning, add a client entry "default - exclude," then put in MAC

addresses for all devices (for example, cable interfaces and PCs) in the client tab and select the policy

to use, including the appropriate tag.

For more detailed information about Cisco Network Registrar, please refer to the document Cisco

Note

Network Registrar for the Cisco uBR10000 Series Universal Broadband Routers.

CNR Steps to Support Subinterfaces

The CNR configuration is done differently if subinterfaces are configured. Here is an example. If you

have configured two ISP subinterfaces and one management subinterface on a Cisco uBR7200 series,

make sure that the management subinterface is the first subinterface that is configured. If cable interface

three—c3/0—is being used, create c3/0.1, c3/0.2 and c3/0.3 as three subinterfaces and c3/0.1 as the first

subinterface configured as the management subinterface.

The Cisco uBR7200 series requires management subinterfaces to route DHCP packets from CMs when

Note

they first initialize because the Cisco uBR7200 series does not know the subinterfaces they belong to

until it has seen the IP addresses assigned to them by gleaning DHCP reply message from CNR.

In CNR, complete the following steps for such a configuration:

Create two scope selection tags such as: isp1-cm-tag and isp2-cm-tag

Step 1

Configure three scopes; for example, mgmt-scope, isp1-cm-scope, and isp2-cm-scope such that

Step 2

isp1-cm-scope and isp2-cm-scope each define mgmt-scope to be the primary scope

Also configure two scopes for PCs for each of the ISPs; isp1-pc-scope and isp2-pc-scope. For scope

Step 3

isp1-cm-scope, configure isp1-cm-tag to be the scope selection tag. For scope isp2-cm-scope,

configure isp2-cm-tag to be the scope selection tag

Step 4

Configure two client classes; for example, isp1-client-class and isp2-client-class

Step 5

Create client entries with their MAC addresses for CMs that belong to ISP1 and assign them to

isp1-client-class. Also assign the scope selection tag isp1-cm-tag

OL-2239-03

Scope selection tags—Identifiers that describe types of scope configurations

This is needed for Option82.

Note

Client classes—Class with which a group of clients is associated

Scope selection tags are excluded from or included in client-classes.

Note

Client—Specific DHCP clients and the defined class to which they belong

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide