This sample configuration shows a Cisco 827 Digital Subscriber Line (DSL) Router 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).
Note: A Cisco client router (Cisco 827) that is in a full bridge mode cannot function as a Dynamic Host Configuration Protocol (DHCP) server for its local LAN clients. If the Cisco 827 is in bridging mode and configured as a DHCP server, it will fail in leasing out IP addresses to its local Ethernet clients (such as PCs and UNIX workstations).
You can configure IRB on the Cisco 827 and bridge to an ISP. In this case, the Cisco 827 can be configured as a DHCP server and Network Address Translation (NAT) and be able to lease out IP addresses from its local pool to its LAN clients.
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There are no specific prerequisites for this document.
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.
In this section, you are presented with the information to configure the features described in this document.
This document uses the network setup shown in the diagram below.
To be able to Telnet to (or ping) the Cisco 827 from the Internet, you must configure an IP address and a MAC address on the ATM interface. For the IP address, configure the same IP address on the ATM interface that you configured on the Ethernet interface. For the MAC address, issue the show interface eth0 command. Note the MAC address and configure this same MAC address on the ATM interface.
When the Cisco 827 is bridging IP on the Ethernet and ATM interfaces, both interfaces can have the same IP address.
Note the no ip routing command in the configuration.
Current configuration: ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R1 ! ip subnet-zero no ip routing ! interface Ethernet0 ip address 10.0.0.1 255.0.0.0 no ip directed-broadcast no ip mroute-cache bridge-group 1 ! interface Atm0 mac-address 0030.96f8.45bd ip address 10.0.0.1 255.0.0.0 no ip directed-broadcast no ip mroute-cache no atm ilmi-keepalive pvc 1/150 encapsulation aal5snap ! bundle-enable bridge-group 1 hold-queue 224 in ! ip classless no ip http server ! bridge 1 protocol ieee ! end
|Cisco Access 6400 NRP1|
bridge irb ! interface ATM0/0/0.200 point-to-point no ip directed-broadcast pvc 1/301 encapsulation aal5snap ! bridge-group 1 ! interface BVI1 ip address 10.0.0.2 255.0.0.0 no ip directed-broadcast bridge 1 protocol ieee bridge 1 route ip ! end
There is currently no verification procedure available for this configuration.
There is currently no specific troubleshooting information available for this configuration.
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Refer to Cisco Technical Tips Conventions for information on conventions used in this document.