Scenarios
This section presents several examples of DSL access configurations. The scenarios cover the configuration for a DSLAM, a Cisco 6400 UAC NSP, a Cisco 6400 UAC NRP, and a DSL CPE - Cisco 827.
Scenario 8-1: Configuring IRB over DSL
In this scenario, you will configure the DSL solution to support data transport using IRB. When completed, the Cisco 827 should train up with the DSLAM, and you should be able to ping and access all normal network services from a client PC attached to the DSL CPE modem. Figure 8-9 illustrates how these devices are interconnected.
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8-9 IRB Lab Scenario
In Example 8-13, the PVC is mapped from the Cisco 827 DSL connection (ATM1/1) to the DSLAM trunking port (ATM0/1).
Example 8-13 ATM PVC Configuration for the Cisco 6160 DSLAM
interface ATM1/1 description IRB Architecture no ip address no atm ilmi-keepalive atm pvc 1 51 interface ATM0/1 1 51
In Example 8-14, the PVC is configured from the DSLAM to the NSP and NRP. Interface ATM8/0/0 is the network line card, and interface ATM1/0/0 is the NRP.
Example 8-14 ATM PVC Configuration for the NSP
interface ATM8/0/0 description OC3 connection to lab-6160 no ip address no ip directed-broadcast no atm ilmi-keepalive atm pvc 1 51 interface ATM1/0/0 1 51
A bridge group is configured for IP, and a BVI is created for IRB. The BVI becomes the default gateway for the remote device attached to the CPE equipment (which will be in subnet 10.1.121.0/24). A subinterface is created for a PVC to the NSP. (See the NSP configuration. The NSP maps this PVC to another PVC from the DSLAM, which maps to the subscriber PVC.) In this case, the 1/51 PVC is mapped across the NSP to the 6160. The subinterface is also put in the bridge group. Example 8-15 shows the IRB configuration for the NRP.
Example 8-15 IRB Configuration for the NRP
bridge irb ! interface BVI1 ip address 10.1.121.1 255.255.255.0 no ip directed-broadcast ! bridge 1 protocol ieee bridge 1 route ip ! interface ATM0/0/0 no ip address no ip directed-broadcast ! interface ATM0/0/0.51 point-to-point description IRB Configuration no ip directed-broadcast pvc 1/51 encapsulation aal5snap ! bridge-group 1
Example 8-16 shows the bridging configuration for the DSL CPE.
Example 8-16 RFC 1483 Bridging Configuration for the Cisco 827
hostname lab-827A ! ip subnet-zero no ip routing ! interface Ethernet0 ip address 10.1.121.2 255.255.255.0 no ip directed-broadcast no ip mroute-cache bridge-group 1 ! interface atm0 mac-address 0001.96a4.8fae <--- MAC Address from Ethernet 0 ip address 10.1.121.2 255.255.255.0 no ip directed-broadcast no ip mroute-cache no atm ilmi-keepalive pvc 1/51 encapsulation aal5snap ! bundle-enable bridge-group 1 hold-queue 224 in ! ip classless no ip http server ! bridge 1 protocol ieee
Scenario 8-2: Configuring RBE over DSL
In this scenario, you will configure the DSL solution to support data transport using RBE. When completed, the Cisco 827 should train up with the DSLAM, and you should be able to ping and access all normal network services from a client PC attached to the DSL CPE modem. Figure 8-10 illustrates how these devices are interconnected.
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8-10
RBE Scenario
In Example 8-17, the PVC is mapped from the Cisco 827 DSL connection (ATM1/2) to the DSLAM trunking port (ATM0/1).
Example 8-17 ATM PVC Configuration for the Cisco 6160 DSLAM
interface ATM1/2 description RBE Architecture no ip address no atm ilmi-keepalive atm pvc 1 52 interface ATM0/1 1 52
In Example 8-18, the PVC is configured from the DSLAM to the NSP and NRP. Interface ATM8/0/0 is the network line card, and interface ATM1/0/0 is the NRP.
Example 8-18 ATM PVC Configuration for the NSP
interface ATM8/0/0 description OC3 connection to lab-6160 no ip address no ip directed-broadcast no atm ilmi-keepalive atm pvc 1 52 interface ATM1/0/0 1 52
Example 8-19 shows the RBE configuration for the NRP. You saw the configuration steps in the previous section.
Example 8-19 RBE Configuration for the NRP
interface Loopback1 ip address 10.1.121.1 255.255.255.0 no ip directed-broadcast ! interface ATM0/0/0 no ip address no ip directed-broadcast ! interface ATM0/0/0.52 point-to-point description RBE Configuration ip unnumbered Loopback1 atm route-bridged ip pvc 1/52 encapsulation aal5snap ! ip route 10.1.121.2 255.255.255.255 ATM0/0/0.52
Example 8-20 shows the bridging configuration for the DSL CPE. As you can see, the CPE configuration is the same when you configure the IRB over DSL.
Example 8-20 RFC 1483 Bridging Configuration for the Cisco 827
hostname lab-827B ! ip subnet-zero no ip routing ! interface Ethernet0 ip address 10.1.121.2 255.255.255.0 no ip directed-broadcast no ip mroute-cache bridge-group 1 ! interface atm0 mac-address 0001.96a4.8fae ip address 10.1.121.2 255.255.255.0 no ip directed-broadcast no ip mroute-cache no atm ilmi-keepalive pvc 1/52 encapsulation aal5snap ! bundle-enable bridge-group 1 hold-queue 224 in ! ip classless no ip http server ! bridge 1 protocol ieee
Scenario 8-3: Configuring PPPoA over DSL
In this scenario, you will configure the DSL solution to support data transport using PPPoA. When completed, the Cisco 827 should train up with the DSLAM, and you should be able to ping and access all normal network services from a client PC attached to the DSL CPE modem. Figure 8-11 illustrates how these devices are interconnected.
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8-11 PPPoA Lab Scenario
In Example 8-21, the PVC is mapped from the Cisco 827 DSL connection (ATM1/3) to the DSLAM trunking port (ATM0/1).
Example 8-21 ATM PVC Configuration for the Cisco 6160 DSLAM
interface ATM1/3 description PPPoA Architecture no ip address no atm ilmi-keepalive atm pvc 1 53 interface ATM0/1 1 53
In Example 8-22, the PVC is configured from the DSLAM to the NSP and NRP. Interface ATM8/0/0 is the network line card, and interface ATM1/0/0 is the NRP.
Example 8-22 ATM PVC Configuration for the NSP
interface ATM8/0/0 description OC3 connection to lab-6160 no ip address no ip directed-broadcast no atm ilmi-keepalive atm pvc 1 53 interface ATM1/0/0 1 53
Example 8-23 shows the PPPoA configuration for the NRP.
Example 8-23 PPPoA Configuration for the NRP
username cisco password 0 cisco ! interface ATM0/0/0 no ip address no ip directed-broadcast ! interface ATM0/0/0.53 point-to-point description PPPoA Configuration pvc 1/53 encapsulation aal5mux ppp Virtual-Template1 ! interface Virtual-Template1 description PPPoA ip unnumbered Ethernet0/0/0 peer default ip address pool ccnp ppp authentication chap pap
Example 8-24 shows the PPPoA configuration for the DSL CPE.
Example 8-24 PPPoA Configuration for the Cisco 827
hostname lab-827C ! ip subnet-zero ! interface Ethernet0 ip address 10.0.0.1 255.255.255.0 no ip directed-broadcast no ip mroute-cache ! interface ATM0 no ip address no ip directed-broadcast no ip mroute-cache no atm ilmi-keepalive pvc 1/53 encapsulation aal5mux ppp dialer dialer pool-member 1 ! ! interface Dialer1 ip address negotiated no ip directed-broadcast encapsulation ppp dialer pool 1 dialer-group 1 ppp authentication chap callin ppp chap hostname cisco ppp chap password cisco ! ip classless ! dialer-list 1 protocol ip permit
When a PPP connection is made, a virtual interface is created, as shown in Example 8-25. The connection is authenticated with PAP/CHAP (using username "cisco" and password "cisco"). IP addresses are negotiated and handed out from the address pool named ccnp.
Example 8-25 Verifying the Virtual Interface
lab-6400NRP#show interface virtual-access 1 Virtual-Access1 is up, line protocol is up Hardware is Virtual Access interface Description: PPPoA Interface is unnumbered. Using address of Ethernet0/0/0 (10.1.1.190) MTU 1500 bytes, BW 100000 Kbit, DLY 100000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) DTR is pulsed for 5 seconds on reset LCP Open Open: IPCP Bound to ATM0/0/0.53 VCD: 3, VPI: 1, VCI: 53 Cloned from virtual-template: 1 Last input 00:00:03, output never, output hang never Last clearing of "show interface" counters 14:05:57 Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 10239 packets input, 141642 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 21626 packets output, 852074 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions
Scenario 8-4: Configuring PPPoE over DSL
In this scenario, you will configure the DSL solution to support data transport using PPPoE. When completed, the Cisco 827 should train up with the DSLAM, and you should be able to ping and access all normal network services from a client PC attached to the DSL CPE modem. Figure 8-12 illustrates how these devices are interconnected.
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8-12 PPPoE Lab Scenario
In Example 8-26, the PVC is mapped from the Cisco 827 DSL connection (ATM1/4) to the DSLAM trunking port (ATM0/1).
Example 8-26 ATM PVC Configuration for the Cisco 6160 DSLAM
interface ATM1/4 description PPPoE Architecture no ip address no atm ilmi-keepalive atm pvc 1 54 interface ATM0/1 1 54
In Example 8-27, the PVC is configured from the DSLAM to the NSP and NRP. Interface ATM8/0/0 is the network line card, and interface ATM1/0/0 is the NRP.
Example 8-27 ATM PVC Configuration for the NSP
interface ATM8/0/0 description OC3 connection to lab-6160 no ip address no ip directed-broadcast no atm ilmi-keepalive atm pvc 1 54 interface ATM1/0/0 1 54
Example 8-28 shows the PPPoE configuration for the NRP.
Example 8-28 PPPoE Configuration for the NRP
username cisco password 0 cisco ! vpdn enable ! vpdn-group 1 accept-dialin protocol pppoe virtual-template 1 interface ATM0/0/0 no ip address no ip directed-broadcast ! interface ATM0/0/0.54 point-to-point description LAB PPPoE Configuration pvc 1/54 encapsulation aal5snap protocol pppoe ! interface Virtual-Template1 description PPPoE ip unnumbered Ethernet0/0/0 ip mtu 1492 peer default ip address pool ccnp ppp authentication chap pap
For PPPoE over DSL, the DSL CPE is also configured for pure RFC 1483 bridging, as shown in Example 8-29.
Example 8-29 RFC 1483 Bridging Configuration for the Cisco 827
hostname lab-827D ! ip subnet-zero no ip routing ! interface Ethernet0 no ip address no ip directed-broadcast no ip mroute-cache bridge-group 1 ! interface atm0 mac-address 0001.96a4.8fae ip address 10.1.121.2 255.255.255.0 no ip directed-broadcast no ip mroute-cache no atm ilmi-keepalive pvc 1/52 encapsulation aal5snap ! bundle-enable bridge-group 1 hold-queue 224 in ! ip classless no ip http server ! bridge 1 protocol ieee
When a PPP connection is made, a virtual interface is created, as shown in Example 8-30. The connection is authenticated with PAP/CHAP (using username "cisco" and password "cisco"). IP addresses are negotiated and handed out from the address pool named ccnp.
Example 8-30 Verifying the Virtual Interface
lab-6400NRP#show int Virtual-Access3 Virtual-Access3 is up, line protocol is up Hardware is Virtual Access interface Description: PPPoE Interface is unnumbered. Using address of Ethernet0/0/0 (10.1.1.190) MTU 1492 bytes, BW 100000 Kbit, DLY 100000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) DTR is pulsed for 5 seconds on reset LCP Open Open: IPCP Bound to ATM0/0/0.54 VCD: 4, VPI: 1, VCI: 54 Cloned from virtual-template: 1 Last input 00:00:04, output never, output hang never Last clearing of "show interface" counters 00:01:34 Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 40 packets input, 2923 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 78 packets output, 6071 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions