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For complete information on the G.SHDSL commands, see the Cisco IOS Release 12.4(15)XZ 
documentation set. 
Example
The following configuration example shows a 4-wire standard G.SHDSL configuration.
!controller DSL 0
 mode atm
 line-term cpe line-mode 4-wire standard
 dsl-mode shdsl symmetric annex B
 line-rate 4608!
interface BRI0
 no ip address encapsulation hdlc
 shutdown
 isdn termination multidrop!
!
interface ATM0 ip address 10.10.10.1 255.255.255.0
 no atm ilmi-keepalive
 pvc 0/35   protocol ip 10.10.10.2 broadcast
  encapsulation aal5snap
 !!
interface FastEthernet0
!interface FastEthernet1
!
interface FastEthernet2!
interface FastEthernet3
 shutdown!
interface Vlan1
 ip address 2.15.15.26 255.255.255.0
Step 11Router(config-ctrl)# protocol ip 10.10.10.2 
broadcast(Optional) Enables IP connectivity and creates a 
point-to-point IP address for the VC. 
Step 12Router(config-ctrl)# encapsulation aal5snap(Optional) Configures the ATM adaptation layer 
(AAL) and encapsulation type. 
 Use the aal2 keyword for AAL2 
 Use the aal5ciscoppp keyword for Cisco PPP 
over AAL5 
 Use the aal5mux keyword for AAL5+MUX 
 Use the aal5nlpid keyword for AAL5+NLPID 
 Use the aal5snap keyword for 
AAL5+LLC/SNAP (the default)
Command Purpose 
						

							 
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!ip forward-protocol nd
ip route 223.255.254.254 255.255.255.255 Vlan1
no ip http serverno ip http secure-server
!
Verifying Configuration
To verify that you have properly configured the router, enter the show run command and look for 
controller DSL and interface ATM0 paramters.
Router#sh run
Building configuration...
 Current configuration : 1298 bytes
!
....... 
!
controller DSL 0 mode atm
 line-term cpe
 line-mode 4-wire standard
 dsl-mode shdsl symmetric annex B line-rate 4608
!         
!interface ATM0
 ip address 10.10.10.1 255.255.255.0
 no atm ilmi-keepalive pvc 0/31 
  protocol ip 10.10.10.5 broadcast
  encapsulation aal5snap !
Configuring a Wireless Interface
The wireless interface enables connection to the router through a wireless LAN connection. For more 
information about configuring a wireless connection, see 
Chapter 13, “Configuring VLANs,” and the 
Cisco Access Router Wireless Configuration Guide.
Configuring a Loopback Interface
The loopback interface acts as a placeholder for the static IP address and provides default routing 
information.
For complete information on the loopback commands, see the Cisco IOS Release 12.4(15)XZ 
documentation
 set.  
						

							 
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To configure a loopback interface perform these steps, beginning in global configuration mode:
Example
The loopback interface in this sample configuration is used to support Network Address Translation 
(NAT) on the virtual-template interface. This configuration example shows the loopback interface 
configured on the Fast Ethernet interface with an IP address of 200.200.100.1/24, which acts as a static 
IP address. The loopback interface points back to virtual-template1, which has a negotiated IP address. 
!interface loopback 0
ip address 200.200.100.1 255.255.255.0 (static IP address)
ip nat outside!
interface Virtual-Template1
ip unnumbered loopback0no ip directed-broadcast
ip nat outside
!
Verifying Configuration
To verify that you have properly configured the loopback interface, enter the show interface loopback 
command. You should see verification output similar to the following example.
Router# show interface loopback 0Loopback0 is up, line protocol is up 
  Hardware is Loopback
  Internet address is 200.200.100.1/24  MTU 1514 bytes, BW 8000000 Kbit, DLY 5000 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation LOOPBACK, loopback not set  Last input never, output never, output hang never
CommandPurpose
Step 1interface type number
Example:
Router(config)# interface Loopback 0
Router(config-if)# 
Enters configuration mode for the loopback 
interface.
Step 2ip address ip-address mask
Example:
Router(config-if)# ip address 10.108.1.1 
255.255.255.0
Router(config-if)# 
Sets the IP address and subnet mask for the 
loopback interface.
Step 3exit
Example:
Router(config-if)# exitRouter(config)# 
Exits configuration mode for the loopback 
interface and returns to global configuration 
mode. 
						

							 
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  Last clearing of show interface counters never  Queueing strategy: fifo
  Output queue 0/0, 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
     0 packets input, 0 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
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets     0 output buffer failures, 0 output buffers swapped out
Another way to verify the loopback interface is to ping it:
Router# ping 200.200.100.1 
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 200.200.100.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Configuring Command-Line Access
To configure parameters to control access to the router perform these steps, beginning in global 
configuration mode:
CommandPurpose
Step 1line [aux | console | tty | vty] line-number 
Example:
Router(config)# line console 0
Router(config-line)# 
Enters line configuration mode, and specifies the 
type of line.
This example specifies a console terminal for 
access.
Step 2password password
Example:
Router(config)# password 5dr4Hepw3Router(config-line)# 
Specifies a unique password for the console 
terminal line.
Step 3login
Example:
Router(config-line)# login
Router(config-line)# 
Enables password checking at terminal session 
login.
Step 4exec-timeout minutes [seconds]
Example:
Router(config-line)# exec-timeout 5 30
Router(config-line)# 
Sets the interval that the EXEC command 
interpreter waits until user input is detected. The 
default is 10 minutes. Optionally, add seconds to 
the interval value.
This example shows a timeout of 5 minutes and 
30
 seconds. Entering a timeout of 0 0 specifies 
never to time out. 
						

							 
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For complete information about the command line commands, see the Cisco IOS Release 12.4(15)XZ 
documentation set. 
Step 5line [aux | console | tty | vty] line-number 
Example:
Router(config-line)# line vty 0 4Router(config-line)# 
Specifies a virtual terminal for remote console 
access.
Step 6password password
Example:
Router(config-line)# password aldf2ad1
Router(config-line)#
Specifies a unique password for the virtual 
terminal line.
Step 7login
Example:
Router(config-line)# login
Router(config-line)# 
Enables password checking at the virtual terminal 
session login.
Step 8end
Example:
Router(config-line)# end
Router# 
Exits line configuration mode, and returns to 
privileged EXEC mode.
Command Purpose 
						

							 
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Example
The following configuration shows the command-line access commands.
You do not need to input the commands marked “default.” These commands appear automatically in the 
configuration file generated when you use the show running-config command.
!line con 0
exec-timeout 10 0
password 4youreyesonlylogin
transport input none (default)
stopbits 1 (default)line vty 0 4
password secret
login!
Configuring Static Routes
Static routes provide fixed routing paths through the network. They are manually configured on the 
router. If the network topology changes, the static route must be updated with a new route. Static routes 
are private routes unless they are redistributed by a routing protocol.
To configure static routes perform these steps, beginning in global configuration mode:
For complete information on the static routing commands, see the Cisco IOS Release 12.4(15)XZ 
documentation set. For more general information on static routing, see 
Appendix B, “Floating Static 
Routes.”
CommandPurpose
Step 1ip route prefix mask {ip-address | interface-type 
interface-number [ip-address]} 
Example:
Router(config)# ip route 192.168.1.0 
255.255.0.0 10.10.10.2
Router(config)# 
Specifies the static route for the IP packets.
For details about this command and about 
additional parameters that can be set, see the 
Cisco 
IOS IP Command Reference, Volume 2 of 4: 
Routing Protocols.
Step 2end
Example:
Router(config)# end
Router# 
Exits router configuration mode, and enters 
privileged EXEC mode. 
						

							 
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  Configuring Dynamic Routes
Example
In the following configuration example, the static route sends out all IP packets with a destination IP 
address of 192.168.1.0 and a subnet mask of 255.255.255.0 on the Fast Ethernet interface to another 
device with an IP address of 10.10.10.2. Specifically, the packets are sent to the configured PVC.
You do not need to enter the command marked “(default).” This command appears automatically in the 
configuration file generated when you use the show running-config command.
!ip classless (default)
ip route 192.168.1.0 255.255.255.0 10.10.10.2!
Verifying Configuration
To verify that you have properly configured static routing, enter the show ip route command and look 
for static routes signified by the “S.” 
You should see verification output similar to the following:
Router# show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
     10.0.0.0/24 is subnetted, 1 subnetsC       10.108.1.0 is directly connected, Loopback0
S* 0.0.0.0/0 is directly connected, FastEthernet0
Configuring Dynamic Routes
In dynamic routing, the network protocol adjusts the path automatically, based on network traffic or 
topology. Changes in dynamic routes are shared with other routers in the network.
The Cisco routers can use IP routing protocols, such as Routing Information Protocol (RIP) or Enhanced 
Interior Gateway Routing Protocol (EIGRP), to learn routes dynamically. You can configure either of 
these routing protocols on your router. 
						

							 
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Configuring Routing Information Protocol
To configure the RIP routing protocol on the router perform these steps, beginning in global 
configuration mode:
For complete information on the dynamic routing commands, see the Cisco IOS Release 12.4(15)XZ 
documentation set. For more general information on RIP, see 
Appendix B, “RIP.” 
CommandTa s k
Step 1router rip
Example:
Router> configure terminalRouter(config)# router rip
Router(config-router)# 
Enters router configuration mode, and enables RIP 
on the router.
Step 2version {1 | 2}
Example:
Router(config-router)# version 2Router(config-router)# 
Specifies use of RIP version 1 or 2.
Step 3network ip-address
Example:
Router(config-router)# network 192.168.1.1
Router(config-router)# network 10.10.7.1
Router(config-router)# 
Specifies a list of networks on which RIP is to be 
applied, using the address of the network of each 
directly connected network.
Step 4no auto-summary
Example:
Router(config-router)# no auto-summary
Router(config-router)# 
Disables automatic summarization of subnet routes 
into network-level routes. This allows subprefix 
routing information to pass across classful network 
boundaries.
Step 5end
Example:
Router(config-router)# endRouter# 
Exits router configuration mode, and enters 
privileged EXEC mode. 
						

							 
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Example
The following configuration example shows RIP version 2 enabled in IP network 10.0.0.0 and 
192.168.1.0.
To see this configuration, use the show running-config command from privileged EXEC mode.
!Router# show running-config
router rip
 version 2 network 10.0.0.0
 network 192.168.1.0
 no auto-summary!
Verifying Configuration
To verify that you have properly configured RIP, enter the show ip route command and look for RIP 
routes signified by “R.” You should see a verification output like the example shown below. 
Router# show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route       o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
     10.0.0.0/24 is subnetted, 1 subnets
C       10.108.1.0 is directly connected, Loopback0R    3.0.0.0/8 [120/1] via 2.2.2.1, 00:00:02, Ethernet0/0
Configuring Enhanced Interior Gateway Routing Protocol
To configure Enhanced Interior Gateway Routing Protocol GRP (EGRP) perform these steps, beginning 
in global configuration mode:
CommandPurpose
Step 1router eigrp as-number
Example:
Router(config)# router eigrp 109
Router(config)# 
Enters router configuration mode, and enables 
EIGRP on the router. The autonomous-system 
number identifies the route to other EIGRP routers 
and is used to tag the EIGRP information. 
						

							 
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  Configuring Enhanced Interior Gateway Routing Protocol
For complete information on the IP EIGRP commands, see the Cisco IOS Release 12.4(15)XZ 
documentation set. For more general information on EIGRP concepts, see 
Appendix B, “Enhanced 
IGRP.”
Example
The following configuration example shows the EIGRP routing protocol enabled in IP networks 
192.145.1.0 and 10.10.12.115. The EIGRP autonomous system number is 109.
To see this configuration use the show running-config command, beginning in privileged EXEC mode.
!router eigrp 109
network 192.145.1.0
network 10.10.12.115!
Verifying Configuration
To verify that you have properly configured IP EIGRP, enter the show ip route command, and look for 
EIGRP routes indicated by “D.” You should see verification output similar to the following:
Router# show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
     10.0.0.0/24 is subnetted, 1 subnets
C       10.108.1.0 is directly connected, Loopback0
D    3.0.0.0/8 [90/409600] via 2.2.2.1, 00:00:02, Ethernet0/0
Step 2network ip-address
Example:
Router(config)# network 192.145.1.0Router(config)# network 10.10.12.115
Router(config)# 
Specifies a list of networks on which EIGRP is to 
be applied, using the IP address of the network of 
directly connected networks.
Step 3end
Example:
Router(config-router)# endRouter# 
Exits router configuration mode, and enters 
privileged EXEC mode.
Command Purpose