Cisco Octal-Port DMT ATU-C Line Card Manual do Utilizador descarregar pdf (Página 18)

DSL Access Architectures and Protocols 193

Step 4

Conﬁgure the VPDN group to accept the dial-in and to be used to establish

PPPoE sessions. Also specify the virtual template that will be used to clone

virtual-access interfaces:

vpdn-group

number

accept-dialin

protocol pppoe

virtual-template

template-number

Step 5 Create the ATM subinterface and PVC. Also conﬁgure AAL5SNAP

encapsulation and specify the PPPoE protocol that the VPDN group will use:

interface atm

slot

/0.

subinterface-number

{multipoint | point-to-point}

pvc [

name

]

vpi/vci

encapsulation aal5snap

protocol pppoe

Step 6 Create the virtual template interface:

interface virtual-template

number

Step 7 Conserve IP addresses by conﬁguring the ATM subinterface as unnumbered,

and assign the IP address of the interface type you want to leverage:

ip unnumbered

interface-name-number

Step 8 Conﬁgure the maximum transmission unit (MTU):

ip mtu 1492

Because Ethernet has a maximum payload size of 1500 bytes, the PPPoE

header is 6 bytes and the PPP ID is 2 bytes, so the PPP MTU must not be

greater than 1492 bytes.

Step 9 Create a local IP address pool:

ip local pool

name begin-ip-address-range

[

end-ip-address-range

]

Step 10 Specify the IP address pool for the interface to use:

peer default ip address pool

poolname

Step 11 Enable CHAP or PAP authentication on the interface:

ppp authentication {chap | pap | chap pap | pap chap} [if-needed]

{default |

list-name

} [callin]

Example 8-12 demonstrates the PPPoE conﬁguration of the Cisco 6400 NRP.

Example 8-12 PPPoE Conﬁguration

username cisco password 0 cisco

vpdn enable

vpdn-group 1

continues

0732x01.book Page 193 Monday, November 17, 2003 2:49 PM

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