VPN第三层隧道协议GRE配置

VPN 第三层隧道协议 GRE 配置（1）图形化拓扑（2）网络拓扑文件################################################################################ ---> Cisco 3640 router contains four slots in which you can install modules.# ---> No fixed LAN or WAN interfaces.# ---> Available network modules for Cisco 3640 Router:# ---> NM-4E (Ethernet, 4 ports)# ---> NM-1FE-TX (FastEthernet, 1 port)# ---> NM-16ESW (Ethernet switch module, 16 ports)# ---> NM-4T (Serial, 4 ports)###############################################################################autostart = false[Localhost]port = 7200udp = 10000workingdir ＝ D:\dynamips\tmp [[3640]] image = D:\dynamips\images\c3640-jk9o3s-mz.123-10.BIN ram = 128 mmap = true confreg = 0x2102 # slot0 = # slot1 = # slot2 = 1 # slot3 = [[Router R1]] model = 3640 console = 3001 # e0/0 = NIO_gen_eth:\Device\NPF_{4D3C3A3C-46CF-477C-AF92-CD32ABAE5179} # connect to MS LoopBack Driver e0/1 = NIO_udp:30000:127.0.0.1:20000 # connect to VPC 1 [[Router R2]] model = 3640 console = 3002 s2/1 = R1 s1/2 s2/3 = R3 s3/2 e0/1 = NIO_udp:30001:127.0.0.1:20001 # connect to VPC 2 [[Router R3]] model = 3640 console = 3003 e0/1 = NIO_udp:30002:127.0.0.1:20002 # connect to VPC 3（3）配置清单R1#show running-config Building configuration...Current configuration : 1580 bytes!version 12.3service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname R1!boot-start-markerboot-end-marker!2!no aaa new-modelip subnet-zero!!no ip domain lookup!ip cefip audit po max-events 100no ftp-server write-enable! !!!!!!!!!!!!! !!!!interface Tunnel0 ip address 10.10.10.1 255.255.255.0 no clns route-cache tunnel source 61.139.21.1 tunnel destination 61.139.32.3! interface Ethernet0/0 no ip address shutdown half-duplex no clns route-cac...