實驗目的
實驗拓撲
配置要點
實驗驗證
R3上開啓debug，查看交互信息：
R1#ping 3.3.3.3 source 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 16/57/164 ms
R3#
*Jul 27 20:03:31.910: ISAKMP (0:0): received packet from 12.1.1.1 dport 500 sport 500 Global (N) NEW SA
*Jul 27 20:03:31.914: ISAKMP: Created a peer struct for 12.1.1.1, peer port 500
*Jul 27 20:03:31.914: ISAKMP: New peer created peer = 0x65B5BB30 peer_handle = 0x80000005
*Jul 27 20:03:31.918: ISAKMP: Locking peer struct 0x65B5BB30, refcount 1 for crypto_isakmp_process_block
*Jul 27 20:03:31.922: ISAKMP: local port 500, remote port 500
*Jul 27 20:03:31.926: insert sa successfully sa = 65B77620
*Jul 27 20:03:31.930: ISAKMP:(0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jul 27 20:03:31.930: ISAKMP:(0):Old State = IKE_READY New State = IKE_R_MM1
IKE第一階段，第一個包交換
*Jul 27 20:03:31.946: ISAKMP:(0): processing SA payload. message ID = 0
*Jul 27 20:03:31.950: ISAKMP:(0): processing vendor id payload
*Jul 27 20:03:31.950: ISAKMP:(0): vendor ID seems Unity/DPD but major 245 mismatch
*Jul 27 20:03:31.962: ISAKMP:(0):found peer pre-shared key matching 12.1.1.1
*Jul 27 20:03:31.962: ISAKMP:(0): local preshared key found
*Jul 27 20:03:31.962: ISAKMP : Scanning profiles for xauth ...
*Jul 27 20:03:31.962: ISAKMP:(0):Checking ISAKMP transform 1 against priority 10 policy
*Jul 27 20:03:31.966: ISAKMP: encryption DES-CBC
*Jul 27 20:03:31.966: ISAKMP: hash MD5
*Jul 27 20:03:31.966: ISAKMP: default group 1
*Jul 27 20:03:31.966: ISAKMP: auth pre-share
*Jul 27 20:03:31.966: ISAKMP: life type in seconds
*Jul 27 20:03:31.966: ISAKMP: life duration (VPI) of 0x0 0x1 0x51 0x80
*Jul 27 20:03:31.966: ISAKMP:(0):atts are acceptable. Next payload is 0
*Jul 27 20:03:31.970: ISAKMP:(0): processing vendor id payload
*Jul 27 20:03:31.970: ISAKMP:(0): vendor ID seems Unity/DPD but major 245 mismatch
*Jul 27 20:03:31.970: ISAKMP:(0):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
*Jul 27 20:03:31.970: ISAKMP:(0):Old State = IKE_R_MM1 New State = IKE_R_MM1
*Jul 27 20:03:31.974: ISAKMP:(0): sending packet to 12.1.1.1 my_port 500 peer_port 500 (R) MM_SA_SETUP發協包到對方PEER"13.1.1.3" 源端口:500 目標端口:500
*Jul 27 20:03:31.974: ISAKMP:(0):Input = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
*Jul 27 20:03:31.978: ISAKMP:(0):Old State = IKE_R_MM1 New State = IKE_R_MM2
*Jul 27 20:03:32.026: ISAKMP (0:0): received packet from 12.1.1.1 dport 500 sport 500 Global (R) MM_SA_SETUP
*Jul 27 20:03:32.026: ISAKMP:(0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jul 27 20:03:32.026: ISAKMP:(0):Old State = IKE_R_MM2 New State = IKE_R_MM3
*Jul 27 20:03:32.026: ISAKMP:(0): processing KE payload. message ID = 0
*Jul 27 20:03:32.054: ISAKMP:(0): processing NONCE payload. message ID = 0
*Jul 27 20:03:32.058: ISAKMP:(0):found peer pre-shared key matching 12.1.1.1
*Jul 27 20:03:32.058: ISAKMP:(1002): processing vendor id payload
*Jul 27 20:03:32.062: ISAKMP:(1002): vendor ID is Unity
*Jul 27 20:03:32.062: ISAKMP:(1002): processing vendor id payload
*Jul 27 20:03:32.062: ISAKMP:(1002): vendor ID is DPD
*Jul 27 20:03:32.062: ISAKMP:(1002): processing vendor id payload
*Jul 27 20:03:32.062: ISAKMP:(1002): speaking to another IOS box!
*Jul 27 20:03:32.062: ISAKMP:(1002):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
*Jul 27 20:03:32.062: ISAKMP:(1002):Old State = IKE_R_MM3 New State = IKE_R_MM3
*Jul 27 20:03:32.066: ISAKMP:(1002): sending packet to 12.1.1.1 my_port 500 peer_port 500 (R) MM_KEY_EXCH
*Jul 27 20:03:32.066: ISAKMP:(1002):Input = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
*Jul 27 20:03:32.066: ISAKMP:(1002):Old State = IKE_R_MM3 New State = IKE_R_MM4
*Jul 27 20:03:32.122: ISAKMP (0:1002): received packet from 12.1.1.1 dport 500 sport 500 Global (R) MM_KEY_EXCH
*Jul 27 20:03:32.122: ISAKMP:(1002):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jul 27 20:03:32.122: ISAKMP:(1002):Old State = IKE_R_MM4 New State = IKE_R_MM5
*Jul 27 20:03:32.122: ISAKMP:(1002): processing ID payload. message ID = 0
*Jul 27 20:03:32.122: ISAKMP (0:1002): ID payload
next-payload : 8
type : 1
address : 12.1.1.1
protocol : 17
port : 500
length : 12
*Jul 27 20:03:32.122: ISAKMP:(0):: peer matches *none* of the profiles
*Jul 27 20:03:32.126: ISAKMP:(1002): processing HASH payload. message ID = 0
*Jul 27 20:03:32.126: ISAKMP:(1002): processing NOTIFY INITIAL_CONTACT protocol 1
spi 0, message ID = 0, sa = 65B77620
*Jul 27 20:03:32.126: ISAKMP:(1002):SA authentication status:
authenticated
*Jul 27 20:03:32.126: ISAKMP:(1002):SA has been authenticated with 12.1.1.1
*Jul 27 20:03:32.126: ISAKMP:(1002):SA authentication status:
authenticated
*Jul 27 20:03:32.126: ISAKMP:(1002): Process initial contact,
bring down existing phase 1 and 2 SA's with local 23.1.1.3 remote 12.1.1.1 remote port 500
*Jul 27 20:03:32.130: ISAKMP: Trying to insert a peer 23.1.1.3/12.1.1.1/500/, and inserted successfully 65B5BB30.
*Jul 27 20:03:32.130: ISAKMP:(1002):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
*Jul 27 20:03:32.130: ISAKMP:(1002):Old State = IKE_R_MM5 New State = IKE_R_MM5
*Jul 27 20:03:32.130: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*Jul 27 20:03:32.134: ISAKMP:(1002):SA is doing pre-shared key authentication using id type ID_IPV4_ADDR
*Jul 27 20:03:32.134: ISAKMP (0:1002): ID payload
next-payload : 8
type : 1
address : 23.1.1.3
protocol : 17
port : 500
length : 12
*Jul 27 20:03:32.134: ISAKMP:(1002):Total payload length: 12
*Jul 27 20:03:32.134: ISAKMP:(1002): sending packet to 12.1.1.1 my_port 500 peer_port 500 (R) MM_KEY_EXCH
*Jul 27 20:03:32.134: ISAKMP:(1002):Input = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
*Jul 27 20:03:32.134: ISAKMP:(1002):Old State = IKE_R_MM5 New State = IKE_P1_COMPLETE
第一階段完成。
*Jul 27 20:03:32.142: ISAKMP:(1002):Input = IKE_MESG_INTERNAL, IKE_PHASE1_COMPLETE
*Jul 27 20:03:32.142: ISAKMP:(1002):Old State = IKE_P1_COMPLETE New State = IKE_P1_COMPLETE
*Jul 27 20:03:32.158: ISAKMP (0:1002): received packet from 12.1.1.1 dport 500 sport 500 Global (R) QM_IDLE
*Jul 27 20:03:32.158: ISAKMP: set new node -1769201649 to QM_IDLE
*Jul 27 20:03:32.162: ISAKMP:(1002): processing HASH payload. message ID = -1769201649
*Jul 27 20:03:32.162: ISAKMP:(1002): processing SA payload. message ID = -1769201649
*Jul 27 20:03:32.162: ISAKMP:(1002):Checking IPSec proposal 1
*Jul 27 20:03:32.162: ISAKMP: transform 1, ESP_DES
*Jul 27 20:03:32.162: ISAKMP: attributes in transform:
*Jul 27 20:03:32.162: ISAKMP: encaps is 1 (Tunnel)
*Jul 27 20:03:32.162: ISAKMP: SA life type in seconds
*Jul 27 20:03:32.162: ISAKMP: SA life duration (basic) of 3600
*Jul 27 20:03:32.162: ISAKMP: SA life type in kilobytes
*Jul 27 20:03:32.162: ISAKMP: SA life duration (VPI) of 0x0 0x46 0x50 0x0
*Jul 27 20:03:32.162: ISAKMP: authenticator is HMAC-MD5
*Jul 27 20:03:32.162: ISAKMP:(1002):atts are acceptable.策略匹配協商完成
*Jul 27 20:03:32.162: IPSEC(validate_proposal_request): proposal part #1
*Jul 27 20:03:32.162: IPSEC(validate_proposal_request): proposal part #1,
(key eng. msg.) INBOUND local= 23.1.1.3, remote= 12.1.1.1,
local_proxy= 3.3.3.0/255.255.255.0/0/0 (type=4),
remote_proxy= 1.1.1.0/255.255.255.0/0/0 (type=4),
protocol= ESP, transform= esp-des esp-md5-hmac (Tunnel),
lifedur= 0s and 0kb,
spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x0
*Jul 27 20:03:32.166: Crypto mapdb : proxy_match
src addr : 3.3.3.0
dst addr : 1.1.1.0
protocol : 0
src port : 0
dst port : 0
*Jul 27 20:03:32.170: ISAKMP:(1002): processing NONCE payload. message ID = -1769201649
*Jul 27 20:03:32.170: ISAKMP:(1002): processing ID payload. message ID = -1769201649
*Jul 27 20:03:32.170: ISAKMP:(1002): processing ID payload. message ID = -1769201649
*Jul 27 20:03:32.170: ISAKMP:(1002):QM Responder gets spi
*Jul 27 20:03:32.170: ISAKMP:(1002):Node -1769201649, Input = IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jul 27 20:03:32.170: ISAKMP:(1002):Old State = IKE_QM_READY New State = IKE_QM_SPI_STARVE
*Jul 27 20:03:32.170: ISAKMP:(1002): Creating IPSec SAs創建IPsec SA
*Jul 27 20:03:32.170: inbound SA from 12.1.1.1 to 23.1.1.3 (f/i) 0/ 0
(proxy 1.1.1.0 to 3.3.3.0)
*Jul 27 20:03:32.170: has spi 0x12160605 and conn_id 0
*Jul 27 20:03:32.170: lifetime of 3600 seconds
*Jul 27 20:03:32.170: lifetime of 4608000 kilobytes
*Jul 27 20:03:32.170: outbound SA from 23.1.1.3 to 12.1.1.1 (f/i) 0/0
(proxy 3.3.3.0 to 1.1.1.0)
*Jul 27 20:03:32.170: has spi 0xDD947DA9 and conn_id 0
*Jul 27 20:03:32.170: lifetime of 3600 seconds
*Jul 27 20:03:32.170: lifetime of 4608000 kilobytes
*Jul 27 20:03:32.170: ISAKMP:(1002): sending packet to 12.1.1.1 my_port 500 peer_port 500 (R) QM_IDLE
*Jul 27 20:03:32.170: ISAKMP:(1002):Node -1769201649, Input = IKE_MESG_INTERNAL, IKE_GOT_SPI
*Jul 27 20:03:32.174: ISAKMP:(1002):Old State = IKE_QM_SPI_STARVE New State = IKE_QM_R_QM2
*Jul 27 20:03:32.178: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*Jul 27 20:03:32.178: Crypto mapdb : proxy_match
src addr : 3.3.3.0
dst addr : 1.1.1.0
protocol : 0
src port : 0
dst port : 0
*Jul 27 20:03:32.182: IPSEC(crypto_ipsec_sa_find_ident_head): reconnecting with the same proxies and peer 12.1.1.1
*Jul 27 20:03:32.182: IPSEC(policy_db_add_ident): src 3.3.3.0, dest 1.1.1.0, dest_port 0
*Jul 27 20:03:32.182: IPSEC(create_sa): sa created,
(sa) sa_dest= 23.1.1.3, sa_proto= 50,
sa_spi= 0x12160605(303433221),
sa_trans= esp-des esp-md5-hmac , sa_conn_id= 3
*Jul 27 20:03:32.182: IPSEC(create_sa): sa created,
(sa) sa_dest= 12.1.1.1, sa_proto= 50,
sa_spi= 0xDD947DA9(3717496233),
sa_trans= esp-des esp-md5-hmac , sa_conn_id= 4
*Jul 27 20:03:32.210: ISAKMP (0:1002): received packet from 12.1.1.1 dport 500 sport 500 Global (R) QM_IDLE
*Jul 27 20:03:32.210: ISAKMP:(1002):deleting node -1769201649 error FALSE reason "QM done (await)"
*Jul 27 20:03:32.210: ISAKMP:(1002):Node -1769201649, Input = IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jul 27 20:03:32.210: ISAKMP:(1002):Old State = IKE_QM_R_QM2 New State = IKE_QM_PHASE2_COMPLETE第二階段完成
*Jul 27 20:03:32.214: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*Jul 27 20:03:32.214: IPSEC(key_engine_enable_outbound): rec'd enable notify from ISAKMP
*Jul 27 20:03:32.214: IPSEC(key_engine_enable_outbound): enable SA with spi 3717496233/50
*Jul 27 20:03:32.214: IPSEC(update_current_outbound_sa): updated peer 12.1.1.1 current outbound sa to SPI DD947DA9
最後在看一次R2的路由表：
R2#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback10
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, Serial1/1
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, Serial1/0