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So this is a lab setup I practiced DMVPN with EIGRP below I have the configuration if you want to follow what I have done.
Static routes were used for the basic connectivity then EIGRP was used to build the DMVPN. I highly recommend that if you have very little experience with this kind of configuration to first do some reading or viewing some videos on YouTube.
Below is some of the configuration used:
MVPN Crypto config hub
crypto isakmp policy 1 authentication pre-share encryption aes hash sha group 5 lifetime 1800 exit crypto isakmp key 0 cisco address 102.1.1.100 crypto isakmp key 0 cisco address 103.1.1.100 crypto isakmp key 0 cisco address 104.1.1.100 crypto ipsec transform-set t-set esp-aes esp-sha-hmac mode transport exit crypto ipsec profile cisco set transform-set t-set exit
************************************************************** spoke
crypto isakmp policy 1 authentication pre-share encryption aes hash sha group 5 lifetime 1800 exit crypto isakmp key 0 cisco address 101.1.1.100 crypto isakmp key 0 cisco address 103.1.1.100 crypto isakmp key 0 cisco address 104.1.1.100 crypto ipsec transform-set t-set esp-aes esp-sha-hmac mode transport exit crypto ipsec profile cisco set transform-set t-set exit
************************************************************ soke
crypto isakmp policy 1 authentication pre-share encryption aes hash sha group 5 lifetime 1800 exit crypto isakmp key 0 cisco address 101.1.1.100 crypto isakmp key 0 cisco address 102.1.1.100 crypto isakmp key 0 cisco address 104.1.1.100 crypto ipsec transform-set t-set esp-aes esp-sha-hmac mode transport exit crypto ipsec profile cisco set transform-set t-set exit
***************************************************************
spoke
crypto isakmp policy 1 authentication pre-share encryption aes hash sha group 5 lifetime 1800 exit crypto isakmp key 0 cisco address 101.1.1.100 crypto isakmp key 0 cisco address 102.1.1.100 crypto isakmp key 0 cisco address 103.1.1.100 crypto ipsec transform-set t-set esp-aes esp-sha-hmac mode transport exit crypto ipsec profile cisco set transform-set t-set exit
****************************************************************
Routing hub
router eigrp 100 no auto-summary network 192.168.1.0 network 192.168.101.0 exit
****************************************************************
Spoke
router eigrp 100 no auto-summary network 192.168.1.0 network 192.168.102.0 exit
*******************************************************************
spoke
router eigrp 100 no auto-summary network 192.168.1.0 network 192.168.103.0 exit
******************************************************************
Spoke
router eigrp 100 no auto-summary network 192.168.1.0 network 192.168.104.0 exit
******************************************************************
interface tunnel configuration
int t0 ip address 192.168.1.2 255.255.255.0 tunnel source serial 0/0 tunnel mode gre multipoint tunnel key 1 ip nhrp map 192.168.1.1 101.1.1.100 ip nhrp map multicast 101.1.1.100 ip nhrp authentication cisco ip nhrp network-id 1 ip nhrp holdtime 300 tunnel protection ipsec profile cisco ip nhrp nhs 192.168.1.1
*********************************************************************
interface tunnel configuration
int t0 ip address 192.168.1.3 255.255.255.0 tunnel source serial 0/0 tunnel mode gre multipoint tunnel key 1 ip nhrp map 192.168.1.1 101.1.1.100 ip nhrp map multicast 101.1.1.100 ip nhrp authentication cisco ip nhrp network-id 1 ip nhrp holdtime 300 tunnel protection ipsec profile cisco ip nhrp nhs 192.168.1.1
**************************************************************************
interface tunnel configuration
int t0 ip address 192.168.1.4 255.255.255.0 tunnel source serial 0/0 tunnel mode gre multipoint tunnel key 1 ip nhrp map 192.168.1.1 101.1.1.100 ip nhrp map multicast 101.1.1.100 ip nhrp authentication cisco ip nhrp network-id 1 ip nhrp holdtime 300 tunnel protection ipsec profile cisco ip nhrp nhs 192.168.1.1 exit
**************************************************************************
R1#show ip eigrp neighbors IP-EIGRP neighbors for process 100 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 2 192.168.1.4 Tu0 14 00:01:09 152 5000 0 3 1 192.168.1.3 Tu0 10 00:01:43 96 5000 0 3 0 192.168.1.2 Tu0 12 00:04:46 41 5000 0 3
*****************************************************************************
R1#show ip route eigrp D 192.168.104.0/24 [90/297270016] via 192.168.1.4, 00:02:05, Tunnel0 D 192.168.102.0/24 [90/297270016] via 192.168.1.2, 00:05:14, Tunnel0 D 192.168.103.0/24 [90/297270016] via 192.168.1.3, 00:02:40, Tunnel0 R1#
*****************************************************************************
R4#show crypto ipsec sa
interface: Tunnel0 Crypto map tag: Tunnel0-head-0, local addr 104.1.1.100
protected vrf: (none) local ident (addr/mask/prot/port): (104.1.1.100/255.255.255.255/47/0) remote ident (addr/mask/prot/port): (101.1.1.100/255.255.255.255/47/0) current_peer 101.1.1.100 port 500 PERMIT, flags={origin_is_acl,} #pkts encaps: 59, #pkts encrypt: 59, #pkts digest: 59 #pkts decaps: 60, #pkts decrypt: 60, #pkts verify: 60 #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 0, #pkts compr. failed: 0 #pkts not decompressed: 0, #pkts decompress failed: 0 #send errors 1, #recv errors 0
local crypto endpt.: 104.1.1.100, remote crypto endpt.: 101.1.1.100 path mtu 1500, ip mtu 1500, ip mtu idb Serial0/0 current outbound spi: 0xA347CF36(2739392310)
inbound esp sas: spi: 0x37DB83F1(937133041) transform: esp-aes esp-sha-hmac , in use settings ={Transport, } conn id: 2001, flow_id: SW:1, crypto map: Tunnel0-head-0 sa timing: remaining key lifetime (k/sec): (4398054/3374) IV size: 16 bytes replay detection support: Y Status: ACTIVE
inbound ah sas:
inbound pcp sas:
outbound esp sas: spi: 0xA347CF36(2739392310) transform: esp-aes esp-sha-hmac , in use settings ={Transport, } conn id: 2002, flow_id: SW:2, crypto map: Tunnel0-head-0 sa timing: remaining key lifetime (k/sec): (4398054/3372) IV size: 16 bytes replay detection support: Y Status: ACTIVE
outbound ah sas:
outbound pcp sas: R4#
**********************************************************************************
R4#ping 192.168.102.1 source fastEthernet 0/0 repeat 1000
Type escape sequence to abort. Sending 1000, 100-byte ICMP Echos to 192.168.102.1, timeout is 2 seconds: Packet sent with a source address of 192.168.104.1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! Success rate is 100 percent (1000/1000), round-trip min/avg/max = 1/2/56 ms
***********************************************************************************
R4#show ip nhrp 192.168.1.1/32 via 192.168.1.1, Tunnel0 created 00:07:16, never expire Type: static, Flags: authoritative used NBMA address: 101.1.1.100 192.168.1.2/32 via 192.168.1.2, Tunnel0 created 00:00:30, expire 00:04:32 Type: dynamic, Flags: router NBMA address: 102.1.1.100 R4#
************************************************************************************
Thanks
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