导语：欢迎大家来到，本文为大带来怎样用DEBUG实现两个路由器之间做LTL的VPN，欢迎大家阅读借鉴。

r1#

r1#

r1#ping 192.168.20.1 source 192.168.10.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.20.1, timeout is 2 seconds:

Packet sent with a source address of 192.168.10.1

*Aug 8 20:20:40.323: ISAKMP:(0): SA request profile is (NULL)

*Aug 8 20:20:40.323: ISAKMP: Created a peer struct for 202.102.1.2, peer port 5

00

*Aug 8 20:20:40.323: ISAKMP: New peer created peer = 0x6637AAAC peer_handle = 0

x80000003

*Aug 8 20:20:40.323: ISAKMP: Locking peer struct 0x6637AAAC, refcount 1 for isa

kmp_initiator

*Aug 8 20:20:40.323: ISAKMP: local port 500, remote port 500

*Aug 8 20:20:40.323: ISAKMP: set new node 0 to QM_IDLE

*Aug 8 20:20:40.323: insert sa successfully sa = 65D3B7A8

*Aug 8 20:20:40.323: ISAKMP:(0):Can not start Aggressive mode, trying Main mode

.

*Aug 8 20:20:40.323: ISAKMP:(0):found peer pre-shared key matching 202.102.1.2

*Aug 8 20:20:40.323: ISAKMP:(0): constructed NAT-T vendor-07 ID

*Aug 8 20:20:40.323: ISAKMP:(0): constructed NAT-T vendor-03 ID

*Aug 8 20:20:40.323: ISAKMP:(0): constructed NAT-T vendor-02 ID

*Aug 8 20:20:40.323: ISAKMP:(0):Input = IKE_MESG_FROM_IPSEC, IKE_SA_REQ_MM

*Aug 8 20:20:40.323: ISAKMP:(0):Old State = IKE_READY New State = IKE_I_MM1

*Aug 8 20:20:40.323: ISAKMP:(0): beginning Main Mode exchange

*Aug 8 20:20:40.323: ISAKMP:(0): sending packet to 202.102.1.2 my_port 500 peer

_port 500 (I) MM_NO_STATE (发送第一个包)

*Aug 8 20:20:40.351: ISAKMP (0:0): received packet from 202.102.1.2 dport 500 s

port 500 Global (I) MM_NO_STATE (接收第二个包)

*Aug 8 20:20:40.355: ISAKMP:(0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH

*Aug 8 20:20:40.355: ISAKMP:(0):Old State = IKE_I_MM1 New State = IKE_I_MM2

*Aug 8 20:20:40.355: ISAKMP:(0): processing SA payload. message ID = 0

*Aug 8 20:20:40.355: ISAKMP:(0): processing vendor id payload

*Aug 8 20:20:40.355: ISAKMP:(0): vendor ID seems Unity/DPD but major 245 mismat

ch

*Aug 8 20:20:40.355: ISAKMP (0:0): vendor ID is NAT-T v7

*Aug 8 20:20:40.355: ISAKMP:(0):found peer pre-shared key matching 202.102.1.2

*Aug 8 20:20:40.355: ISAKMP:(0): local preshared key found

*Aug 8 20:20:40.355: ISAKMP : Scanning profiles for xauth ...

*Aug 8 20:20:40.355: ISAKMP:.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 28/46/72 ms

r1#(0):Checking ISAKMP transform 1 against priority 100 policy

*Aug 8 20:20:40.355: ISAKMP: encryption DES-CBC

*Aug 8 20:20:40.355: ISAKMP: hash SHA

*Aug 8 20:20:40.355: ISAKMP: default group 1

*Aug 8 20:20:40.355: ISAKMP: auth pre-share

*Aug 8 20:20:40.355: ISAKMP: life type in seconds

*Aug 8 20:20:40.355: ISAKMP: life duration (VPI) of 0x0 0x1 0x51 0x80

*Aug 8 20:20:40.355: ISAKMP:(0):atts are acceptable.(双方都是认同的)Next payload is 0

如果老是重传，说明策略不匹配

*Aug 8 20:20:40.355: ISAKMP:(0): processing vendor id payload

*Aug 8 20:20:40.355: ISAKMP:(0): vendor ID seems Unity/DPD but major 245 mismatch

*Aug 8 20:20:40.355: ISAKMP (0:0): vendor ID is NAT-T v7

*Aug 8 20:20:40.355: ISAKMP:(0):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MOD

E

*Aug 8 20:20:40.355: ISAKMP:(0):Old State = IKE_I_MM2 New State = IKE_I_MM2

*Aug 8 20:20:40.355: ISAKMP:(0): sending packet to 202.102.1.2 my_port 500 peer

_port 500 (I) MM_SA_SETUP

*Aug 8 20:20:40.355: ISAKMP:(0):Input = IKE_ME

r1#SG_INTERNAL, IKE_PROCESS_COMPLETE

*Aug 8 20:20:40.355: ISAKMP:(0):Old State = IKE_I_MM2 New State = IKE_I_MM3

发送一个

*Aug 8 20:20:40.403: ISAKMP (0:0): received packet from 202.102.1.2 dport 500 s

port 500 Global (I) MM_SA_SETUP

*Aug 8 20:20:40.407: ISAKMP:(0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH

*Aug 8 20:20:40.411: ISAKMP:(0):Old State = IKE_I_MM3 New State = IKE_I_MM4

接收一个

*Aug 8 20:20:40.419: ISAKMP:(0): processing KE payload. message ID = 0 公共值

*Aug 8 20:20:40.423: ISAKMP:(0): processing NONCE payload. message ID = 0 随机数

*Aug 8 20:20:40.423: ISAKMP:(0):found peer pre-shared key matching 202.102.1.2

*Aug 8 20:20:40.423: ISAKMP:(1002): processing vendor id payload

*Aug 8 20:20:40.423: ISAKMP:(1002): vendor ID is Unity

*Aug 8 20:20:40.423: ISAKMP:(1002): processing vendor id payload

*Aug 8 20:20:40.423: ISAKMP:(1002): vendor ID is DPD

*Aug 8 20:20:40.423: ISAKMP:(1002): processing vendor id payload

*Aug 8 20:20:40.423: ISAKMP:(1002): speaking to another IOS box!

*Au

r1#g 8 20:20:40.423: ISAKMP:(1002):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_

MODE

*Aug 8 20:20:40.423: ISAKMP:(1002):Old State = IKE_I_MM4 New State = IKE_I_MM4

*Aug 8 20:20:40.423: ISAKMP:(1002):Send initial contact

*Aug 8 20:20:40.423: ISAKMP:(1002):SA is doing pre-shared key authentication us

ing id type ID_IPV4_ADDR

*Aug 8 20:20:40.423: ISAKMP (0:1002): ID payload