PPPoFR:
Uses virtual access interfaces cloned from a virtual template interface.
Works only on point-to-point (sub-)interfaces
Uses virtual access interfaces cloned from a virtual template interface.
Works only on point-to-point (sub-)interfaces
Configuring Virtual Template Interfaces
1. Create a virtual
template interface.
2. Configure the
virtual template interface: enable PPP encapsulation using encapsulation ppp.
3. Enable IP addressing on the virtual template interface using the ip
unnumbered interface-type/number.
IP address pool can
be used to assign IP addresses, or an IP address can be assigned directly to
the virtual template interface.
Example:
interface loopback0
ip address 172.16.1.1 255.255.255.252
!
interface
Virtual-Template1
ip unnumbered Loopback0
no ip directed-broadcast
ppp authentication chap
Apply the virtual
template interface and configure PPP over Frame Relay
1. In interface
configuration mode enable Frame Relay with the encapsulation frame-relay command.
2. Apply a virtual template with PPP encapsulation to the DLCI to which
it will apply. Use the frame-relay interface-dlci dlci [ppp
virtual-template-name-string] command.
Example:
interface serial 3/0
no ip address
encapsulation frame-relay
!
interface serial
3/0.1 point-to-point
frame-relay interface-dlci 101 ppp
virtual-template1
!
interface
Virtual-Template1
ip unnumbered loopback0
ppp authentication chap
!
interface loopback 0
ip address 172.16.1.1 255.255.255.252
Adding CHAP
Authentication to PPP over Frame Relay
Example:
!
hostname R1
!
username R2 password
0 cisco
!
interface
Virtual-Template1
ip address 192.168.1.2 255.255.255.0
ppp authentication chap
!
interface Serial1
no ip address
encapsulation frame-relay
!
interface Serial1.1
point-to-point
frame-relay interface-dlci 101 ppp
Virtual-Template1
!
hostname R2
!
username R1 password
0 cisco
!
interface
Virtual-Template1
ip address 192.168.1.1 255.255.255.0
no peer default ip address
ppp authentication chap
!
interface Serial1
no ip address
encapsulation frame-relay
!
interface Serial1.1
point-to-point
frame-relay interface-dlci 101 ppp
Virtual-Template1
!
- Works even if Virtual-Templates on each routers are on different subnets.
- It is possible to assign ip addresses from a local pool:
R5:!interface Virtual-Template1 ip unnumbered Loopback0 peer default ip address pool PPPpool!ip local pool PPPpool 10.7.7.7 10.7.7.88!
Then, Virtual-Access interfaces get IP Addresses from this pool:R5#show ip route connected 10.0.0.0/32 is subnetted, 2 subnetsC 10.7.7.8 is directly connected, Virtual-Access2C 10.7.7.9 is directly connected, Virtual-Access3 192.168.1.0/32 is subnetted, 1 subnetsC 192.168.1.1 is directly connected, Loopback0
