Configuring a Cisco 827 Router With VoIP Supported IRB Using RFC1483 Bridging

Document ID: 12903

Introduction
Before You Begin
      Conventions
      Prerequisites
      Components Used
Configure
      Network Diagram
      Configurations
Related Information

Introduction

This sample configuration shows two Cisco 827 Digital Subscriber Line (DSL) Routers connecting to a Cisco 6130 Digital Subscriber Line Access Multiplexer (DSLAM) and terminating on a Cisco 6400 Universal Access Concentrator (UAC) configured with Integrated Routing and Bridging (IRB).

Each Cisco 827 has a plain old telephone service (POTS) phone attached to its voice port and each router has been configured to dial the other.

Before You Begin

Conventions

For more information on document conventions, see the Cisco Technical Tips Conventions.

Prerequisites

There are no specific prerequisites for this document.

Components Used

The information in this document is based on the software and hardware versions below.

Cisco 827-4V customer premises equipment (CPE) IOS Software Release 12.1(1)XB
Cisco 6400 UAC-NRP IOS Software Release 12.0(7)DC
Cisco 6400 UAC-NSP IOS Software Release 12.0(4)DB
Cisco 6130 DSLAM-NI2 IOS Software Release 12.1(1)DA

The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If you are working in a live network, ensure that you understand the potential impact of any command before using it.

Current configuration: 
! 
version 12.1 
service timestamps debug datetime msec 
service timestamps log datetime msec
! 
hostname R1 
! 
ip subnet-zero 
!
bridge irb 
! 
interface Ethernet0
 no ip directed-broadcast 
 no ip mroute-cache 
!
interface ATM0
 no ip address 
 no ip directed-broadcast
 no atm ilmi-keepalive 
 pvc 1/150
  encapsulation aal5snap 
 ! 
 bundle-enable 
 bridge-group 1 
 hold-queue 224 in 
!
interface BVI1
 ip address 172.16.0.1 255.255.0.0 
 no ip directed-broadcast 
! 
ip classless 
ip route 0.0.0.0 0.0.0.0 <next hop IP address>

!--- The next hop IP address is also called the 
!--- default gateway and is provided by your ISP. 
!--- For this example, one valid default gateway could
!--- be the BVI interface of the Cisco 6400 NRP, 172.16.0.2.

no ip http server 
! 
bridge 1 protocol ieee 
 bridge 1 route ip 
! 
voice-port 1 
 timing hookflash-in 0 
! 
voice-port 2
 timing hookflash-in 0 
! 
voice-port 3 
 timing hookflash-in 0 
! 
voice-port 4 
 timing hookflash-in 0 
! 
dial-peer voice 1 pots 
 destination-pattern 2222 
 port 1
! 
dial-peer voice 2 voip 
 destination-pattern 1111 
 session target ipv4:172.16.0.3
!
end

Cisco (R2)

Note: Dialing 2222 will ring the router R1 phone attached to voice port 1.

Current configuration
! 
version 12.1 
service timestamps debug datetime msec 
service timestamps log datetime msec 
!
hostname R2
! 
ip subnet-zero 
bridge irb 
! 
interface Ethernet0
 no ip directed-broadcast 
! 
interface ATM0 
 no ip address 
 no ip directed-broadcast 
 no ip mroute-cache 
 no atm ilmi-keepalive 
 pvc 2/100 
  encapsulation aal5snap
 ! 
 bundle-enable 
 bridge-group 1 
 hold-queue 224 in 
! 
interface BVI1 
 ip address 172.16.0.3 255.255.0.0 
 no ip directed-broadcast 
! 
ip classless 
ip route 0.0.0.0 0.0.0.0 <next hop IP address>

!--- The next hop IP address is also called the 
!--- default gateway and is provided by your ISP. 
!--- For this example, one valid default gateway could
!--- be the BVI interface of the Cisco 6400 NRP, 172.16.0.2.

no ip http server 
! 
bridge 1 protocol ieee 
 bridge 1 route ip 
!
voice-port 1 
 timing hookflash-in 0 
! 
voice-port 2 
 timing hookflash-in 0 
! 
voice-port 3 
 timing hookflash-in 0 
! 
voice-port 4 
 timing hookflash-in 0 
! 
dial-peer voice 1 pots 
 destination-pattern 1111 
 port 1 
! 
dial-peer voice 2 voip 
 destination-pattern 2222 
 session target ipv4:172.16.0.1
! 
end

Cisco Access 6400 NRP

Current configuration:
!
version 12.0 
service timestamps debug datetime msec 
service timestamps log datetime msec 
!
hostname NRP
!
ip subnet-zero 
! 
bridge irb 
! 
interface ATM0/0/0 
 no ip address 
 no ip directed-broadcast 
 no ip route-cache 
 no ip mroute-cache 
 no atm ilmi-keepalive 
! 
interface ATM0/0/0.200 point-to-point 
 no ip directed-broadcast 
 no ip route-cache 
 pvc 1/150 
  encapsulation aal5snap 
 ! 
 bridge-group 1 
! 
interface ATM0/0/0.300 point-to-point 
 no ip directed-broadcast 
 no ip route-cache 
 pvc 2/100
  encapsulation aal5snap
 ! 
 bridge-group 1 
! 
interface Ethernet0/0/1 
 no ip address 
 no ip directed-broadcast 
! 
interface Ethernet0/0/0 
 no ip directed-broadcast 
! 
interface FastEthernet0/0/0 
 no ip address 
 no ip directed-broadcast 
 full-duplex 
!
interface BVI1 
 ip address 172.16.0.2 255.255.0.0 
 no ip directed-broadcast 
!
bridge 1 protocol ieee 
 bridge 1 route ip 
! 
end

Related Information

Updated: Feb 26, 2008

Document ID: 12903

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