Public static IPsec tunnel between two routers cisco [VRF aware]

Hi all

I am trying to configure static IPsec tunnel between two routers. Router R1 has [no VRF] only global routing table.

Router R2 has two routing tables:

* vrf INET - used for internet connectivity

* global routing table - used for VPN connections

Here are the basic configs:

R1

crypto ISAKMP policy 1
BA 3des
md5 hash
preshared authentication
Group 2
ISAKMP crypto key 7V7u841k2D3Q7v98d6Y4z0zF address 203.0.0.3
invalid-spi-recovery crypto ISAKMP
!
Crypto ipsec transform-set esp - aes 256 esp-sha-hmac TRSET_AES-256_SHA
transport mode
!
Crypto ipsec TUNNEL-IPSEC-PROTECTION profile
game of transformation-TRSET_AES-256_SHA
!
interface Loopback0
10.0.1.1 IP address 255.255.255.255
IP ospf 1 zone 0
!
interface Tunnel0
IP 192.168.255.34 255.255.255.252
IP ospf 1 zone 0
source of tunnel FastEthernet0/0
tunnel destination 203.0.0.3
ipv4 ipsec tunnel mode
Ipsec TUNNEL-IPSEC-PROTEC protection tunnel profile
!
interface FastEthernet0/0
IP 102.0.0.1 255.255.255.0

!

IP route 203.0.0.3 255.255.255.255 FastEthernet0/0 102.0.0.2

#######################################################

R2

IP vrf INET
RD 1:1
!
Keyring cryptographic test vrf INET
address of pre-shared-key 102.0.0.1 key 7V7u841k2D3Q7v98d6Y4z0zF
!
crypto ISAKMP policy 1
BA 3des
md5 hash
preshared authentication
Group 2
invalid-spi-recovery crypto ISAKMP
crypto isakmp profile test
door-key test
function identity address 102.0.0.1 255.255.255.255
!
Crypto ipsec transform-set esp - aes 256 esp-sha-hmac TRSET_AES-256_SHA
transport mode
!
Crypto ipsec TUNNEL-IPSEC-PROTECTION profile
game of transformation-TRSET_AES-256_SHA
Test Set isakmp-profile
!
interface Loopback0
IP 10.0.2.2 255.255.255.255
IP ospf 1 zone 0
!
interface Tunnel0
IP 192.168.255.33 255.255.255.252
IP ospf 1 zone 0
source of tunnel FastEthernet0/0
tunnel destination 102.0.0.1
ipv4 ipsec tunnel mode
tunnel vrf INET
Ipsec TUNNEL-IPSEC-PROTEC protection tunnel profile
!
interface FastEthernet0/0
IP vrf forwarding INET
IP 203.0.0.3 255.255.255.0

!

IP route 102.0.0.1 255.255.255.255 FastEthernet0/0 203.0.0.2

#######################################################

There is a router between R1 and R2, it is used only for connectivity:

interface FastEthernet0/0
IP 102.0.0.2 255.255.255.0
!
interface FastEthernet0/1
IP 203.0.0.2 255.255.255.0

The problem that the tunnel is not coming, I can't pass through phase I.

The IPsec VPN are not my strength. So if someone could show me what mistake I make, I'd appreciate it really.

I joined ouptup #debug R2 crypto isakmp

Source and destination Tunnel0 is belong to VRF INET, the static route need to be updated.

IP route vrf INET 102.0.0.1 255.255.255.255 FastEthernet0/0 203.0.0.2

crypto isakmp profile test

VRF INET

door-key test
function identity address 102.0.0.1 255.255.255.255

Tags: Cisco Security

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    I need to establish IPSec site to site tunnel between cisco 1721 (version supports for IPSec). U can help me to set up the basic configuration.

    The network diagram is standard. The objective of the implementation is to establsih a communication between two end counterparts.

    IE LAN---> router---> Internet--->---> LAN router

    Thanks in advance

    Concerning

    RAMU

    Of course, here is an example configuration for VPN Site to Site tunnel between 2 IOS routers:

    http://www.Cisco.com/en/us/Tech/tk583/TK372/technologies_configuration_example09186a0080194650.shtml

    Hope that helps.

  • Double IPSec tunnel between routers

    I am facing the following challenge:

    I have two routers and want to build two IPSec encapsulated between them, with the help of ASIT tunnel interfaces.

    The interaces two tunnel would in that case the same source and destination ip addresses.

    With a single tunnel interface defined, it works well, however, as soon as the second tunnel interface is defined, the first breaks down.

    Here is an example configuration:

    interface Tunnel0
    IP 192.168.1.1 255.255.255.252
    source of tunnel Serial1/0
    tunnel destination 10.1.1.6
    ipv4 ipsec tunnel mode
    protection of ipsec profile ipsecprofile tunnel
    !
    Tunnel1 interface
    IP 192.168.1.5 255.255.255.252
    source of tunnel Serial1/0
    tunnel destination 10.1.1.6
    ipv4 ipsec tunnel mode
    protection of ipsec profile ipsecprofile tunnel
    !

    In fact, the matter is rather a conceptual issue than a direct. What is the root cause, this type of configuration does not work?

    ESP protocol is the distinction between endponits ESP SAs based on SPI identifier as well, isn't? If so, what is wrong here?

    Thanks in advance...

    Hi Frank,.

    As a general rule, you cannot have two interfaces of tunnel with the same tunnel source (series 1/0) and destinations (10.1.1.6) tunnel; with the same method (ipv4) tunel.

    The work around that would be to bounce one of the tunnels on a loopback interface.

    This tunnel 1: tunnel_interface_1 - series 1/0---internet---10.1.1.6

    and tunnel 2: tunnel_interface_2---loopback---serial1/0---internet---10.1.1.6

    In this way the two tunnels can be up at the same time.

    I hope this helps.

    -Shrikant

    P.S.: Please check question one answer, if it has been resolved. Note the useful messages. Thank you.

  • ASA 5505 - I can't create an IPSEC VPN between two ASA 5505

    Hello

    I have two ASA 5505 with basic license and I'm trying to create a VPN IPSEC using the CLI. Here are the steps I did:

    1 Configure ASA-1 (host name, vlan 1 and vlan 2).

    2. configure a static route

    3. create object network (local and remote)

    4. create the access list

    5. create ikev1 crypto

    6. create tunnel-group

    7 Configure nat

    and I repeat the steps above with the ASA but another change IP.

    Are to correct the above steps?

    Why can I not create an IPSEC VPN between devices?.

    No, you needn't. The ASA configuration is ok. Packet trace proved it. I think it can be a problem on the hosts. Please, check the firewall on the PC and try to put out of service, if it is running.

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