BNG Broadband Network Gateway 意思为用户的接入点，通过它们连接到宽带网络，“它们”指的是网络设备，例如思科的 ASR9K 。
本文主要是为了记录下两种最简单的在 ASR 9000 上部署 BNG 的配置，IPOE 和 PPPoE.
IPoE #
pool vrf default ipv4 IPSUB
network 70.70.0.0/16
exclude 70.70.70.70 0.0.0.0
!
dhcp ipv4
profile IPSUB server
pool IPSUB
default-router 70.70.70.70
!
interface Bundle-Ether70.70 server profile IPSUB
dynamic-template
type ipsubscriber IPSUB
ipv4 unnumbered Loopback70
ipv4 access-group IPSUB ingress
ipv4 access-group IPSUB egress
!
ipv4 access-list IPSUB
5 permit ipv4 any any
interface Bundle-Ether70.70
ipv4 point-to-point
ipv4 unnumbered Loopback70
service-policy type control subscriber POL_IPSUB
encapsulation dot1q 70
ipsubscriber ipv4 l2-connected
initiator dhcp
!
class-map type control subscriber match-any CLASS_IPSUB
match protocol dhcpv4
end-class-map
!
policy-map type control subscriber POL_IPSUB
event session-start match-first
class type control subscriber CLASS_IPSUB do-until-failure
1 activate dynamic-template IPSUB
!
!
end-policy-map
!
PPPoE #
pool vrf default ipv4 PPP
address-range 50.50.0.1 50.50.255.255
!
dynamic-template
type ppp PPPoE
ppp ipcp peer-address pool PPP
ipv4 unnumbered Loopback50
!
interface Bundle-Ether70
!
interface Bundle-Ether70.50
service-policy type control subscriber POL_PPP
pppoe enable
encapsulation dot1q 50
!
class-map type control subscriber match-any PPP
match protocol ppp
end-class-map
!
!
policy-map type control subscriber POL_PPP
event session-start match-first
class type control subscriber PPP do-until-failure
10 activate dynamic-template PPPoE
!
!
end-policy-map
!