请哪位大虾给详细解释一下？

guozhw

router#sh ru
Building configuration...

Current configuration : 1706 bytes
!
version 12.2
no parser cache
service config
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname router
!
logging rate-limit console 10 except errors
aaa new-model
aaa authentication login default group radius local
aaa authentication login NO_AUTHEN none
aaa authentication ppp default if-needed group radius local
aaa authorization network default group radius local
enable secret 5 $1$iBWu$d/ol8HvN17c9oxb/XBifU/
!
username guest password 0 guest
username abc password 0 123
ip subnet-zero
!
!
no ip domain-lookup
ip domain-name hsgdj.hb.cepic.com.cn
ip name-server 10.228.48.1
ip name-server 10.228.0.1
!
no ip dhcp-client network-discovery
async-bootp dns-server 10.228.48.1 10.228.0.1
async-bootp nbns-server 10.228.48.1
!
!
!
interface Ethernet0/0
ip address 10.228.48.19 255.255.255.0
half-duplex
!
interface Group-Async1
ip unnumbered Ethernet0/0
encapsulation ppp
ip tcp header-compression passive
no ip mroute-cache
keepalive 60
async mode dedicated
peer default ip address pool ippool
ppp authentication chap
group-range 33 48
!
ip local pool ippool 10.228.48.231 10.228.48.246
ip classless
ip route 0.0.0.0 0.0.0.0 10.228.48.32
no ip http server
!
!
radius-server retransmit 3
!
line con 0
login authentication NO_AUTHEN
line 33 48
modem InOut
modem autoconfigure discovery
transport preferred none
transport output none
autoselect during-login
autoselect ppp
flowcontrol hardware
line aux 0
line vty 0 4
password cisco
login authentication NO_AUTHEN
line vty 5 15
password cisco
!
no scheduler allocate
!
end

yuhong

普通的拨号访问配置呀，没有什么特别