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jvaishnav
Staff
Staff

Created on ‎11-10-2020 12:47 AM

Article Id 191187

Technical Tip: ADVPN with RIP as the routing protocol

Description
This article describes the configuration ADVPN with RIP.

Scope
For version 6.4.3.

Solution
This is a sample configuration of ADVPN with RIP as routing protocol. The following options has to be enabled for this configuration:

1) On the hub FortiGate, 'IPsec phase1-interface net-device disable' has to be run.
2) RIP has to be used between the hub and spoke FortiGates.
3) split-horizon-status enable has to be run on the hub FortiGate.





Because the GUI can only complete part of the configuration, using the CLI is recommended.

To configure ADVPN with RIP as the routing protocol using the CLI:

1) In the CLI, configure hub FortiGate's WAN, internal interface, and static route.
# config system interface
    edit "port9"
        set alias "WAN"
        set ip 22.1.1.1 255.255.255.0
    next
    edit "port10"
        set alias "Internal"
        set ip 172.16.101.1 255.255.255.0
    next
end   

# config router static
    edit 1
        set gateway 22.1.1.2
        set device "port9"
    next  
end
2) Configure the hub FortiGate.

- Configure the hub FortiGate IPsec phase1-interface and phase2-interface.
# config vpn ipsec phase1-interface
    edit "advpn-hub"
        set type dynamic
        set interface "port9"
        set peertype any
        set net-device disable
        set proposal aes128-sha256 aes256-sha256 3des-sha256 aes128-sha1 aes256-sha1 3des-sha1
        set add-route disable
        set dpd on-idle
        set auto-discovery-sender enable
        set tunnel-search nexthop
        set psksecret sample
        set dpd-retryinterval 5
    next
end
# config vpn ipsec phase2-interface
    edit "advpn-hub"
        set phase1name "advpn-hub"
        set proposal aes128-sha1 aes256-sha1 3des-sha1 aes128-sha256 aes256-sha256 3des-sha256
    next
end
- Configure the hub FortiGate firewall policy.
# config firewall policy
    edit 1
        set name "spoke2hub"
        set srcintf "advpn-hub"
        set dstintf "port10"
        set srcaddr "all"
        set dstaddr "172.16.101.0"
        set action accept
        set schedule "always"
        set service "ALL"
    next
    edit 2
        set name "spoke2spoke"
        set srcintf "advpn-hub"
        set dstintf "advpn-hub"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
    next
end  
- Configure the hub FortiGate's IPsec tunnel interface IP address.
# config system interface
    edit "advpn-hub1"
        set ip 10.10.10.254 255.255.255.255
        set remote-ip 10.10.10.253 255.255.255.0
    next
end
- Configure the hub FortiGate's RIP.
# config router rip
    set default-information-originate enable
    config network
        edit 1
            set prefix 10.10.10.0 255.255.255.0
        next
        edit 2
            set prefix 172.16.101.0 255.255.255.0
        next
    end
    # config interface
        edit "advpn-hub"
            set split-horizon-status disable
        next
    end
end
3) Configure the spoke FortiGates.

- Configure the spoke FortiGates' WAN, internal interfaces, and static routes.

Configure Spoke1.
# config system interface
    edit "wan1"
        set alias "primary_WAN"
        set ip 15.1.1.2 255.255.255.0
    next
    edit "wan2"
        set alias "secondary_WAN"
        set ip 12.1.1.2 255.255.255.0
    next
    edit "internal"
        set ip 10.1.100.1 255.255.255.0
    next
end

# config router static
    edit 1
        set gateway 12.1.1.1
        set device "wan2"
        set distance 15        
    next
    edit 2
        set gateway 15.1.1.1
        set device "wan1"
    next
end  
Configure the Spoke2.
# config system interface
    edit "wan1"
        set alias "primary_WAN"
        set ip 13.1.1.2 255.255.255.0
    next
    edit "wan2"
        set alias "secondary_WAN"
        set ip 17.1.1.2 255.255.255.0
    next
    edit "internal"
        set ip 192.168.4.1 255.255.255.0
    next
end

# config router static
    edit 1
        set gateway 17.1.1.1
        set device "wan2"
        set distance 15        
    next
    edit 2
        set gateway 13.1.1.1
        set device "wan1"
    next
end 
- Configure the spoke FortiGates' IPsec phase1-interface and phase2-interface.

Configure Spoke1.
# config vpn ipsec phase1-interface
    edit "spoke1"
        set interface "wan1"
        set peertype any
        set net-device enable
        set proposal aes128-sha256 aes256-sha256 aes128-sha1 aes256-sha1
        set add-route disable
        set dpd on-idle
        set auto-discovery-receiver enable
        set remote-gw 22.1.1.1
        set psksecret sample
        set dpd-retryinterval 5
    next
    edit "spoke1_backup"
        set interface "wan2"
        set peertype any
        set net-device enable
        set proposal aes128-sha256 aes256-sha256 aes128-sha1 aes256-sha1
        set add-route disable
        set dpd on-idle
        set auto-discovery-receiver enable
        set remote-gw 22.1.1.1
        set monitor "spoke1"
        set psksecret sample
        set dpd-retryinterval 5
    next    
end
# config vpn ipsec phase2-interface
    edit "spoke1"
        set phase1name "spoke1"
        set proposal aes128-sha1 aes256-sha1 aes128-sha256 aes256-sha256 aes128gcm aes256gcm chacha20poly1305
        set auto-negotiate enable
    next
    edit "spoke1_backup"
        set phase1name "spoke1_backup"
        set proposal aes128-sha1 aes256-sha1 aes128-sha256 aes256-sha256 aes128gcm aes256gcm chacha20poly1305
        set auto-negotiate enable
    next  
end
Configure Spoke2.

# config vpn ipsec phase1-interface
    edit "spoke2"
        set interface "wan1"
        set peertype any
        set net-device enable
        set proposal aes128-sha256 aes256-sha256 aes128-sha1 aes256-sha1
        set add-route disable
        set dpd on-idle
        set auto-discovery-receiver enable
        set remote-gw 22.1.1.1
        set psksecret sample
        set dpd-retryinterval 5
    next
    edit "spoke2_backup"
        set interface "wan2"
        set peertype any
        set net-device enable
        set proposal aes128-sha256 aes256-sha256 aes128-sha1 aes256-sha1
        set add-route disable
        set dpd on-idle
        set auto-discovery-receiver enable
        set remote-gw 22.1.1.1
        set monitor "spoke2"
        set psksecret sample
        set dpd-retryinterval 5
    next    
end

# config vpn ipsec phase2-interface
    edit "spoke2"
        set phase1name "spoke2"
        set proposal aes128-sha1 aes256-sha1 aes128-sha256 aes256-sha256 aes128gcm aes256gcm chacha20poly1305
        set auto-negotiate enable
    next
    edit "spoke2_backup"
        set phase1name "spoke2_backup"
        set proposal aes128-sha1 aes256-sha1 aes128-sha256 aes256-sha256 aes128gcm aes256gcm chacha20poly1305
        set auto-negotiate enable
    next  
end
- Configure the spoke FortiGates' firewall policies.

Configure Spoke1.
# config firewall policy
    edit 1
        set name "outbound_advpn"
        set srcintf "internal"
        set dstintf "spoke1" "spoke1_backup"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
    next
    edit 2
        set name "inbound_advpn"
        set srcintf "spoke1" "spoke1_backup"
        set dstintf "internal"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
    next
end
Configure Spoke2.
# config firewall policy
    edit 1
        set name "outbound_advpn"
        set srcintf "internal"
        set dstintf "spoke2" "spoke2_backup"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
    next
    edit 2
        set name "inbound_advpn"
        set srcintf "spoke2" "spoke2_backup"
        set dstintf "internal"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
    next
end
- Configure the spoke FortiGates' tunnel interface IP addresses.

Configure Spoke1.
# config system interface
    edit "spoke1"
        set ip 10.10.10.1 255.255.255.255
        set remote-ip 10.10.10.254 255.255.255.0
    next
    edit "spoke1_backup"
        set ip 10.10.10.2 255.255.255.255
        set remote-ip 10.10.10.254 255.255.255.0
    next    
end
Configure Spoke2.
# config system interface
    edit "spoke2"
        set ip 10.10.10.3 255.255.255.255
        set remote-ip 10.10.10.254 255.255.255.0
    next
    edit "spoke2_backup"
        set ip 10.10.10.4 255.255.255.255
        set remote-ip 10.10.10.254 255.255.255.0
    next    
end
- Configure the spoke FortiGates' RIP.

Configure Spoke1.
# config router rip
    # config network
        edit 1
            set prefix 10.10.10.0 255.255.255.0
        next
        edit 2
            set prefix 10.1.100.0 255.255.255.0
        next
    end
end
Configure Spoke2.
# config router rip
    # config network
        edit 1
            set prefix 10.10.10.0 255.255.255.0
        next
        edit 2
            set prefix 192.168.4.0 255.255.255.0
        next
    end
end
4) Run diagnose and get commands on Spoke1.

- Run the diagnose vpn tunnel list command on Spoke1. The system should return the following:
list all ipsec tunnel in vd 0
----
name=spoke1 ver=1 serial=2 15.1.1.2:0->22.1.1.1:0
bound_if=7 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/536 options[0218]=npu create_dev frag-rfc  accept_traffic=1

proxyid_num=1 child_num=1 refcnt=17 ilast=2 olast=2 ad=r/2
stat: rxp=1 txp=87 rxb=200 txb=6208
dpd: mode=on-idle on=1 idle=5000ms retry=3 count=0 seqno=1040
natt: mode=none draft=0 interval=0 remote_port=0
proxyid=spoke1 proto=0 sa=1 ref=4 serial=1 auto-negotiate adr
  src: 0:0.0.0.0/0.0.0.0:0
  dst: 0:0.0.0.0/0.0.0.0:0
  SA:  ref=7 options=1a227 type=00 soft=0 mtu=1438 expire=1793/0B replaywin=1024
       seqno=57 esn=0 replaywin_lastseq=00000002 itn=0
  life: type=01 bytes=0/0 timeout=2370/2400
  dec: spi=c53a8f60 esp=aes key=16 6b54e32d54d039196a74d96e96d1cf14
       ah=sha1 key=20 e4903474614eafc96eda6400a3a5e88bbcb26a7f
  enc: spi=6e36349d esp=aes key=16 914a40a7993eda75c4dea2f42905f27d
       ah=sha1 key=20 8040eb08342edea2dae5eee058fd054a46688267
  dec:pkts/bytes=1/132, enc:pkts/bytes=86/11696
  npu_flag=03 npu_rgwy=22.1.1.1 npu_lgwy=15.1.1.2 npu_selid=1 dec_npuid=1 enc_npuid=1
----
name=spoke1_backup ver=1 serial=1 12.1.1.2:0->22.1.1.1:0
bound_if=6 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/536 options[0218]=npu create_dev frag-rfc  accept_traffic=0

proxyid_num=1 child_num=0 refcnt=11 ilast=0 olast=0 ad=/0
stat: rxp=0 txp=0 rxb=0 txb=0
dpd: mode=on-idle on=0 idle=5000ms retry=3 count=0 seqno=0
natt: mode=none draft=0 interval=0 remote_port=0
proxyid=spoke1_backup proto=0 sa=0 ref=2 serial=1 auto-negotiate adr
  src: 0:0.0.0.0/0.0.0.0:0
  dst: 0:0.0.0.0/0.0.0.0:0
- Run the get router info rip database command on Spoke1. The system should return the following:
Codes: R - RIP, Rc - RIP connected, Rs - RIP static, K - Kernel,
       C - Connected, S - Static, O - OSPF, I - IS-IS, B - BGP

   Network            Next Hop         Metric From            If     Time
Rc 10.1.100.0/24                             1.                 internal
Rc 10.10.10.2/32                               1.                 spoke1
R  172.16.101.0/24    10.10.10.254             1. 10.10.10.254      spoke1 02:28
R  192.168.4.0/24      10.10.10.254              1. 10.10.10.254       spoke1 02:44
- Run the get router info routing-table rip command on Spoke1. The system should return the following:
Routing table for VRF=0
R       172.16.101.0/24 [120/2] via 10.10.10.254, spoke1, 00:08:38
R       192.168.4.0/24 [120/3] via 10.10.10.254, spoke1, 00:08:38
- Generate traffic between the spokes, then check the shortcut tunnel and routing table. Run the diagnose vpn tunnel list command on Spoke1. The system should return the following:
list all ipsec tunnel in vd 0
----
name=spoke1 ver=1 serial=2 15.1.1.2:0->22.1.1.1:0
bound_if=7 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/536 options[0218]=npu create_dev frag-rfc  accept_traffic=1

proxyid_num=1 child_num=0 refcnt=19 ilast=3 olast=3 ad=r/2
stat: rxp=1 txp=78 rxb=200 txb=5546
dpd: mode=on-idle on=1 idle=5000ms retry=3 count=0 seqno=1039
natt: mode=none draft=0 interval=0 remote_port=0
proxyid=spoke1 proto=0 sa=1 ref=5 serial=1 auto-negotiate adr
  src: 0:0.0.0.0/0.0.0.0:0
  dst: 0:0.0.0.0/0.0.0.0:0
  SA:  ref=7 options=1a227 type=00 soft=0 mtu=1438 expire=1807/0B replaywin=1024
       seqno=4e esn=0 replaywin_lastseq=00000002 itn=0
  life: type=01 bytes=0/0 timeout=2370/2400
  dec: spi=c53a8f60 esp=aes key=16 6b54e32d54d039196a74d96e96d1cf14
       ah=sha1 key=20 e4903474614eafc96eda6400a3a5e88bbcb26a7f
  enc: spi=6e36349d esp=aes key=16 914a40a7993eda75c4dea2f42905f27d
       ah=sha1 key=20 8040eb08342edea2dae5eee058fd054a46688267
  dec:pkts/bytes=1/132, enc:pkts/bytes=77/10456
  npu_flag=03 npu_rgwy=22.1.1.1 npu_lgwy=15.1.1.2 npu_selid=1 dec_npuid=1 enc_npuid=1
----
name=spoke1_backup ver=1 serial=1 12.1.1.2:0->22.1.1.1:0
bound_if=6 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/536 options[0218]=npu create_dev frag-rfc  accept_traffic=0

proxyid_num=1 child_num=0 refcnt=11 ilast=20 olast=20 ad=/0
stat: rxp=0 txp=0 rxb=0 txb=0
dpd: mode=on-idle on=0 idle=5000ms retry=3 count=0 seqno=0
natt: mode=none draft=0 interval=0 remote_port=0
proxyid=spoke1_backup proto=0 sa=0 ref=2 serial=1 auto-negotiate adr
  src: 0:0.0.0.0/0.0.0.0:0
  dst: 0:0.0.0.0/0.0.0.0:0
----
name=spoke1_0 ver=1 serial=a 15.1.1.2:4500->13.1.1.2:4500
bound_if=7 lgwy=static/1 tun=intf/0 mode=dial_inst/3 encap=none/728 options[02d8]=npu create_dev no-sysctl rgwy-chg frag-rfc  accept_traffic=1

 parent=spoke1 index=0
proxyid_num=1 child_num=0 refcnt=20 ilast=2 olast=0 ad=r/2
stat: rxp=1 txp=7 rxb=112 txb=480
dpd: mode=on-idle on=1 idle=5000ms retry=3 count=0 seqno=0
natt: mode=keepalive draft=32 interval=10 remote_port=4500
proxyid=spoke1 proto=0 sa=1 ref=8 serial=1 auto-negotiate adr
  src: 0:0.0.0.0/0.0.0.0:0
  dst: 0:0.0.0.0/0.0.0.0:0
  SA:  ref=6 options=1a227 type=00 soft=0 mtu=1422 expire=2358/0B replaywin=1024
       seqno=8 esn=0 replaywin_lastseq=00000002 itn=0
  life: type=01 bytes=0/0 timeout=2367/2400
  dec: spi=c53a8f61 esp=aes key=16 c66aa7ae9657068108ed47c048ff56b6
       ah=sha1 key=20 60661c68e20bbc913c2564ade85e01ea3769e703
  enc: spi=79cb0f30 esp=aes key=16 bf6c898c2e1c64baaa679ed5d79c3b58
       ah=sha1 key=20 146ca78be6c34eedb9cd66cc328216e08682ecb1
  dec:pkts/bytes=1/46, enc:pkts/bytes=7/992
  npu_flag=03 npu_rgwy=13.1.1.2 npu_lgwy=15.1.1.2 npu_selid=6 dec_npuid=1 enc_npuid=1
- Run the get router info routing-tale rip command. The system should return the following:
Routing table for VRF=0
R       172.16.101.0/24 [120/2] via 10.10.10.254, spoke1, 00:09:04
R       192.168.4.0/24 [120/2] via 10.10.10.3, spoke1_0, 00:00:02

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