帧中继网络基本配置
R1:
interface Serial1/0/0
link-protocol fr
undo fr inarp
//关闭反向ARP，手工配置映射信息
fr map ip 10.10.123.2 102 broadcast
//IP地址为对端，DLCI号为本端
fr map ip 10.10.123.3 103 broadcast
ip address 10.10.123.1 255.255.255.0

R2:
interface Serial1/0/0
link-protocol fr
undo fr inarp
fr map ip 10.10.123.1 201 broadcast
fr map ip 10.10.123.3 201 broadcast
ip address 10.10.123.2 255.255.255.0

R3：
interface Serial1/0/0
link-protocol fr
undo fr inarp
fr map ip 10.10.123.1 301 broadcast
fr map ip 10.10.123.2 301 broadcast
ip address 10.10.123.3 255.255.255.0

检验：
查看虚电路信息
< R3 > dis fr pvc-info
PVC statistics for interface Serial1/0/0 (DTE, physical UP)
DLCI = 301, USAGE = LOCAL (00000100), Serial1/0/0
create time = 2020/02/17 17:52:59, status = ACTIVE
InARP = Disable, PVC-GROUP = NONE
in packets = 11, in bytes = 3435973836800
out packets = 11, out bytes = 704
查看映射信息
< R3 >dis fr map-info
Map Statistics for interface Serial1/0/0 (DTE)
DLCI = 301, IP 10.10.123.1, Serial1/0/0
//DLCI为本地编号，IP为对端地址，本地端口号
create time = 2020/02/17 17:53:35, status = ACTIVE
encapsulation = ietf, vlink = 1, broadcast
DLCI = 301, IP 10.10.123.2, Serial1/0/0
create time = 2020/02/17 17:53:54, status = ACTIVE
encapsulation = ietf, vlink = 2, broadcast