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В текущей статье будут приведены готовые конфигурации схем DMVPN Dual Hub Single Cloud с динамическим IP-адресом на SPOKE. Более подробная и поэтапная настройка DMVPN с динамическим IP-адресом описана в статье https://docs.eltex-co.ru/x/wYO1HQ

В текущей статье рассмотрим пример двух схем DMVPN Dual Hub Single Cloud с динамическим IP-адресом на SPOKE:

1. Два HUB являются отдельными DHCP-серверами для выдачи IP-адресов SPOKE.

Схема:

Задача: 

Организовать DMVPN Single Cloud схему с динамическими IP-адресами на SPOKE с двумя HUB.  HUB-1 и HUB-2 будут выступать в качестве DHCP-серверов для SPOKE. Firewall отключен.

Используемые алгоритмы для IKE SA:

 - IKE version: 1
 - Authentication algorithm: sha2-256
 - Encryption algorithm: aes256cbc
 - DH-group 19

Используемые алгоритмы для IPse SA:

 - Authentication algorithm: sha2-256
 - Encryption algorithm: aes256cbc
 - pfs dh-group 19
 - Protocol: ESP

1) Конфигурации маршрутизаторов

Для реализации схемы, в которой HUB-1 и HUB-2 будут выступать в качестве DHCP-серверов для SPOKE, необходимо разделить пул для каждого HUB.

Например, HUB-1 будет выдавать IP-адреса из диапазона 192.0.2.3-192.0.2.128:

ip dhcp-server pool DMVPN_pool_1
  network 192.0.2.0/24
  address-range 192.0.2.3-192.0.2.128
exit


А HUB-2 будет выдавать IP-адреса из диапазона 192.0.2.129-192.0.2.254:

ip dhcp-server pool DMVPN_pool_2
  network 192.0.2.0/24
  address-range 192.0.2.129-192.0.2.254
exit
Конфигурация HUB-1

HUB-1# show running-config 
hostname HUB-1

interface gigabitethernet 1/0/1
  ip firewall disable
  ip address 203.0.113.2/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.2
  ip address 192.0.2.1/24
  ip tcp adjust-mss 1340
  ip nhrp ipsec ipsec_dynamic dynamic
  ip nhrp multicast dynamic
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway
  ike-policy ike_policy
  local address 203.0.113.2
  local network 203.0.113.2/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_dynamic
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway
  ike ipsec-policy ipsec_policy
  enable
exit

ip dhcp-server
ip dhcp-server pool DMVPN_pool_1
  network 192.0.2.0/24
  address-range 192.0.2.3-192.0.2.128
exit

ip route 203.0.113.4/30 203.0.113.1
ip route 203.0.113.8/30 203.0.113.1

Конфигурация HUB-2

HUB-2# show running-config 
hostname HUB-2

interface gigabitethernet 1/0/1
  ip firewall disable
  ip address 203.0.113.14/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.14
  ip address 192.0.2.2/24
  ip tcp adjust-mss 1340
  ip nhrp ipsec ipsec_dynamic dynamic
  ip nhrp multicast dynamic
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway
  ike-policy ike_policy
  local address 203.0.113.14
  local network 203.0.113.14/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_dynamic
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway
  ike ipsec-policy ipsec_policy
  enable
exit

ip dhcp-server
ip dhcp-server pool DMVPN_pool_2
  network 192.0.2.0/24
  address-range 192.0.2.129-192.0.2.254
exit

ip route 203.0.113.4/30 203.0.113.13
ip route 203.0.113.8/30 203.0.113.13

Конфигурация SPOKE-1

SPOKE-1# show running-config
hostname SPOKE-1

interface gigabitethernet 1/0/1
  ip firewall disable
  ip address 203.0.113.6/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.6
  ip address dhcp
  ip tcp adjust-mss 1340
  ip nhrp holding-time 360
  ip nhrp map 192.0.2.1 203.0.113.2
  ip nhrp map 192.0.2.2 203.0.113.14
  ip nhrp nhs 192.0.2.1/24
  ip nhrp nhs 192.0.2.2/24
  ip nhrp ipsec ipsec_static_hub1 static
  ip nhrp ipsec ipsec_static_hub2 static
  ip nhrp ipsec ipsec_dynamic_spoke dynamic
  ip nhrp multicast nhs
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway_hub1
  ike-policy ike_policy
  local address 203.0.113.6
  local network 203.0.113.6/32 protocol gre 
  remote address 203.0.113.2
  remote network 203.0.113.2/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_hub2
  ike-policy ike_policy
  local address 203.0.113.6
  local network 203.0.113.6/32 protocol gre 
  remote address 203.0.113.14
  remote network 203.0.113.14/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_spoke
  ike-policy ike_policy
  local address 203.0.113.6
  local network 203.0.113.6/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_static_hub1
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub1
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_static_hub2
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub2
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_dynamic_spoke
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_spoke
  ike ipsec-policy ipsec_policy
  enable
exit

ip route 203.0.113.0/30 203.0.113.5
ip route 203.0.113.12/30 203.0.113.5
ip route 203.0.113.8/30 203.0.113.5

Конфигурация SPOKE-2

SPOKE-2# show running-config 
hostname SPOKE-2

interface gigabitethernet 1/0/1
  ip firewall disable
  ip address 203.0.113.10/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.10
  ip address dhcp
  ip tcp adjust-mss 1340
  ip nhrp holding-time 360
  ip nhrp map 192.0.2.1 203.0.113.2
  ip nhrp map 192.0.2.2 203.0.113.14
  ip nhrp nhs 192.0.2.1/24
  ip nhrp nhs 192.0.2.2/24
  ip nhrp ipsec ipsec_static_hub1 static
  ip nhrp ipsec ipsec_static_hub2 static
  ip nhrp ipsec ipsec_dynamic_spoke dynamic
  ip nhrp multicast nhs
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway_hub1
  ike-policy ike_policy
  local address 203.0.113.10
  local network 203.0.113.10/32 protocol gre 
  remote address 203.0.113.2
  remote network 203.0.113.2/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_hub2
  ike-policy ike_policy
  local address 203.0.113.10
  local network 203.0.113.10/32 protocol gre 
  remote address 203.0.113.14
  remote network 203.0.113.14/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_spoke
  ike-policy ike_policy
  local address 203.0.113.10
  local network 203.0.113.10/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_static_hub1
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub1
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_static_hub2
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub2
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_dynamic_spoke
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_spoke
  ike ipsec-policy ipsec_policy
  enable
exit

ip route 203.0.113.0/30 203.0.113.9
ip route 203.0.113.12/30 203.0.113.9
ip route 203.0.113.4/30 203.0.113.9

2) Оперативный вывод команд

В такой схеме выдача IP-адреса будет происходить от двух DHCP-серверов и SPOKE выберет IP-адрес из первого DHCP-Offer. После получения IP-адреса каждый SPOKE будет зарегистрирован на двух HUB.

Вывод оперативных команд с HUB-1. HUB-1 выдал IP-адрес для SPOKE-2:

HUB-1# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_dynamic                     203.0.113.2       203.0.113.6       0xda0300d138dabc41   0xbc7b6c043ee51ad2   Established   
ipsec_dynamic                     203.0.113.2       203.0.113.10      0x307a8925564d0624   0x2ba01a0287533685   Established  

HUB-1# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.4              203.0.113.10       gre 1       00:05:51    0,00:08:12       dynamic           ULC          
192.0.2.129            203.0.113.6        gre 1       00:04:55    0,00:09:08       dynamic           ULC          

HUB-1# show ip dhcp binding 
IP address         MAC / Client ID                                                 Binding type   Lease expires at                  
----------------   -------------------------------------------------------------   ------------   -------------------------------   
192.0.2.4          0x00656c7465782d613866392e346261612e626537372d6772655f31        active         Friday 2024/08/09 10:25:08  

Вывод оперативных команд с HUB-2. HUB-2 выдал IP-адрес для SPOKE-1:

HUB-2# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_dynamic                     203.0.113.14      203.0.113.6       0x59ebcb9097f9e5f5   0x4d29937488287a9a   Established   
ipsec_dynamic                     203.0.113.14      203.0.113.10      0x17f101f75202f394   0x4fa7fa49e50368ca   Established  

HUB-2# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.4              203.0.113.10       gre 1       00:04:05    0,00:14:00       dynamic           LC           
192.0.2.129            203.0.113.6        gre 1       00:05:10    0,00:14:56       dynamic           ULC          

HUB-2# show ip dhcp binding 
IP address         MAC / Client ID                                                 Binding type   Lease expires at                  
----------------   -------------------------------------------------------------   ------------   -------------------------------   
192.0.2.129        0x00656c7465782d363831332e653237662e353531612d6772655f31        active         Saturday 1970/03/07 22:25:04  

Вывод оперативных команд с SPOKE-1 и SPOKE-2:

SPOKE-1# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_static_hub2                 203.0.113.6       203.0.113.14      0x59ebcb9097f9e5f5   0x4d29937488287a9a   Established   
ipsec_static_hub1                 203.0.113.6       203.0.113.2       0xda0300d138dabc41   0xbc7b6c043ee51ad2   Established  

SPOKE-1# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.1              203.0.113.2        gre 1       --          --               static            RLC          
192.0.2.2              203.0.113.14       gre 1       --          --               static            RLC          

SPOKE-1# show ip interfaces gre 
IP address                                            Interface              Admin   Link    Type      
---------------------------------------------------   --------------------   -----   -----   -------   
192.0.2.129/24                                        gre 1                  Up      Up      DHCP      
 Expires at:           Friday 2024/08/09 10:24:47

SPOKE-2# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_static_hub2                 203.0.113.10      203.0.113.14      0x17f101f75202f394   0x4fa7fa49e50368ca   Established   
ipsec_static_hub1                 203.0.113.10      203.0.113.2       0x307a8925564d0624   0x2ba01a0287533685   Established  

SPOKE-2# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.1              203.0.113.2        gre 1       --          --               static            RLC          
192.0.2.2              203.0.113.14       gre 1       --          --               static            RLC          

SPOKE-2# show ip interfaces gre 
IP address                                            Interface              Admin   Link    Type      
---------------------------------------------------   --------------------   -----   -----   -------   
192.0.2.4/24                                          gre 1                  Up      Up      DHCP      

Например, если HUB-1 вышел из строя и истекло время аренды IP-адреса на SPOKE-2, то SPOKE-2 получит новый IP-адрес из пула HUB-2:

SPOKE-2# show ip interfaces gre 
IP address                                            Interface              Admin   Link    Type      
---------------------------------------------------   --------------------   -----   -----   -------   
192.0.2.130/24                                        gre 1                  Up      Up      DHCP    

SPOKE-2# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.1              203.0.113.2        gre 1       --          --               static            RUL          
192.0.2.2              203.0.113.14       gre 1       --          --               static            RULC   

HUB-2# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.129            203.0.113.6        gre 1       00:05:39    0,01:19:00       dynamic           LC           
192.0.2.130            203.0.113.10       gre 1       00:05:40    0,00:00:37       dynamic           LC          

HUB-2# show ip dhcp binding 
IP address         MAC / Client ID                                                 Binding type   Lease expires at                  
----------------   -------------------------------------------------------------   ------------   -------------------------------   
192.0.2.129        0x00656c7465782d363831332e653237662e353531612d6772655f31        active         Saturday 1970/03/07 22:25:04      
192.0.2.130        0x00656c7465782d613866392e346261612e626537372d6772655f31        active         Saturday 1970/03/07 23:43:27      

2. Два HUB являются DHCP-Relay агентами и для выдачи IP-адресов SPOKE используется внешний DHCP-server.

Схема:

Задача:

Организовать DMVPN Single Cloud схему с динамическими IP-адресами на SPOKE с двумя HUB.  HUB-1 и HUB-2 будут выступать в качестве  DHCP-Relay агентов и будут перенаправлять DHCP-запросы на DHCP-сервер. Firewall отключен.

Используемые алгоритмы для IKE SA:

 - IKE version: 1
 - Authentication algorithm: sha2-256
 - Encryption algorithm: aes256cbc
 - DH-group 19

Используемые алгоритмы для IPse SA:

 - Authentication algorithm: sha2-256
 - Encryption algorithm: aes256cbc
 - pfs dh-group 19
 - Protocol: ESP

1) Конфигурации маршрутизаторов:

Для настройки HUB в качестве DHCP-Relay агента необходимо использовать следующие команды:
  - ip helper-address A.B.C.D, с помощью которой указывается IP DHCP-сервера, которому будут отправляться DHCP Discover пакеты, перехваченные DHCP Relay-агентом.
  - ip dhcp information option-insert, с помощью которой включается вставка DHCP Relay агентом, работающим на multipoint GRE туннеле ESR в роли NHRP NHS, 82 опции в DHCP-запросы от NHRP NHC. В добавляемой опции указывается NBMA-адрес NHRP NHC.
  - ip dhcp-relay, с помощью которой включается агент DHCP-relay на маршрутизаторе ESR.

tunnel gre 1
  ip dhcp information option-insert
  ip helper-address 198.51.100.2
exit

ip dhcp-relay

Конфигурация HUB-1

HUB-1# show running-config 
hostname HUB-1

interface gigabitethernet 1/0/1
  ip firewall disable
  ip address 203.0.113.2/30
exit
interface gigabitethernet 1/0/2
  ip firewall disable
  ip address 198.51.100.1/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.2
  ip dhcp information option-insert
  ip address 192.0.2.1/24
  ip helper-address 198.51.100.2
  ip tcp adjust-mss 1340
  ip nhrp ipsec ipsec_dynamic dynamic
  ip nhrp multicast dynamic
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway
  ike-policy ike_policy
  local address 203.0.113.2
  local network 203.0.113.2/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_dynamic
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway
  ike ipsec-policy ipsec_policy
  enable
exit

nat source
  ruleset s_nat
    to interface gigabitethernet 1/0/2
    rule 1
      action source-nat interface
      enable
    exit
  exit
exit

ip dhcp-relay

ip route 203.0.113.4/30 203.0.113.1
ip route 203.0.113.8/30 203.0.113.1

Конфигурация HUB-2

HUB-2# show running-config 
hostname HUB-2

interface gigabitethernet 1/0/1
  ip firewall disable
  ip address 203.0.113.14/30
exit
interface gigabitethernet 1/0/2
  ip firewall disable
  ip address 198.51.100.5/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.14
  ip dhcp information option-insert
  ip address 192.0.2.2/24
  ip helper-address 198.51.100.6
  ip tcp adjust-mss 1340
  ip nhrp ipsec ipsec_dynamic dynamic
  ip nhrp multicast dynamic
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway
  ike-policy ike_policy
  local address 203.0.113.14
  local network 203.0.113.14/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_dynamic
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway
  ike ipsec-policy ipsec_policy
  enable
exit

nat source
  ruleset s_nat
    to interface gigabitethernet 1/0/2
    rule 1
      action source-nat interface
      enable
    exit
  exit
exit

ip dhcp-relay

ip route 203.0.113.4/30 203.0.113.13
ip route 203.0.113.8/30 203.0.113.13

Конфигурация SPOKE-1

SPOKE-1# show running-config 
hostname SPOKE-1

interface gigabitethernet 1/0/2
  ip firewall disable
  ip address 203.0.113.6/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.6
  ip address dhcp
  ip tcp adjust-mss 1340
  ip nhrp holding-time 360
  ip nhrp map 192.0.2.1 203.0.113.2
  ip nhrp map 192.0.2.2 203.0.113.14
  ip nhrp nhs 192.0.2.1/24
  ip nhrp nhs 192.0.2.2/24
  ip nhrp ipsec ipsec_static_hub1 static
  ip nhrp ipsec ipsec_static_hub2 static
  ip nhrp ipsec ipsec_dynamic_spoke dynamic
  ip nhrp multicast nhs
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway_hub1
  ike-policy ike_policy
  local address 203.0.113.6
  local network 203.0.113.6/32 protocol gre 
  remote address 203.0.113.2
  remote network 203.0.113.2/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_hub2
  ike-policy ike_policy
  local address 203.0.113.6
  local network 203.0.113.6/32 protocol gre 
  remote address 203.0.113.14
  remote network 203.0.113.14/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_spoke
  ike-policy ike_policy
  local address 203.0.113.6
  local network 203.0.113.6/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_static_hub1
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub1
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_static_hub2
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub2
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_dynamic_spoke
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_spoke
  ike ipsec-policy ipsec_policy
  enable
exit

ip route 203.0.113.0/30 203.0.113.5
ip route 203.0.113.12/30 203.0.113.5
ip route 203.0.113.8/30 203.0.113.5

Конфигурация SPOKE-2

SPOKE-2# show running-config 
hostname SPOKE-2

interface gigabitethernet 1/0/2
  ip firewall disable
  ip address 203.0.113.10/30
exit

tunnel gre 1
  ttl 255
  mtu 1400
  multipoint
  ip firewall disable
  local address 203.0.113.10
  ip address dhcp
  ip tcp adjust-mss 1340
  ip nhrp holding-time 360
  ip nhrp map 192.0.2.1 203.0.113.2
  ip nhrp map 192.0.2.2 203.0.113.14
  ip nhrp nhs 192.0.2.1/24
  ip nhrp nhs 192.0.2.2/24
  ip nhrp ipsec ipsec_static_hub1 static
  ip nhrp ipsec ipsec_static_hub2 static
  ip nhrp ipsec ipsec_dynamic_spoke dynamic
  ip nhrp multicast nhs
  ip nhrp enable
  enable
exit

security ike proposal ike_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  dh-group 19
exit

security ike policy ike_policy
  pre-shared-key ascii-text encrypted 8CB5107EA7005AFF
  proposal ike_proposal
exit

security ike gateway ike_gateway_hub1
  ike-policy ike_policy
  local address 203.0.113.10
  local network 203.0.113.10/32 protocol gre 
  remote address 203.0.113.2
  remote network 203.0.113.2/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_hub2
  ike-policy ike_policy
  local address 203.0.113.10
  local network 203.0.113.10/32 protocol gre 
  remote address 203.0.113.14
  remote network 203.0.113.14/32 protocol gre 
  mode policy-based
exit
security ike gateway ike_gateway_spoke
  ike-policy ike_policy
  local address 203.0.113.10
  local network 203.0.113.10/32 protocol gre 
  remote address any
  remote network any protocol gre 
  mode policy-based
exit

security ipsec proposal ipsec_proposal
  authentication algorithm sha2-256
  encryption algorithm aes256
  pfs dh-group 19
exit

security ipsec policy ipsec_policy
  proposal ipsec_proposal
exit

security ipsec vpn ipsec_static_hub1
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub1
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_static_hub2
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_hub2
  ike ipsec-policy ipsec_policy
  enable
exit
security ipsec vpn ipsec_dynamic_spoke
  type transport
  ike establish-tunnel route
  ike gateway ike_gateway_spoke
  ike ipsec-policy ipsec_policy
  enable
exit

ip route 203.0.113.0/30 203.0.113.9
ip route 203.0.113.12/30 203.0.113.9
ip route 203.0.113.4/30 203.0.113.9

Конфигурация DHCP-server

DHCP-server# show running-config                                                                 
hostname DHCP-server                                                                             
                                                                                                 
interface gigabitethernet 1/0/2                                                                  
  ip firewall disable                                                                            
  ip address 198.51.100.2/30                                                                     
exit                                                                                             
interface gigabitethernet 1/0/3                                                                  
  ip firewall disable                                                                            
  ip address 198.51.100.6/30                                                                     
exit                                                                                             
                                                                                                 
ip dhcp-server                                                                                   
ip dhcp-server pool DMVPN                                                                        
  network 192.0.2.0/24                                                                           
  address-range 192.0.2.3-192.0.2.254                                                            
exit                                                                                             
                                                                                                 
ip route 192.0.2.1/32 198.51.100.1                                                               
ip route 192.0.2.2/32 198.51.100.5 

2) Оперативный вывод команд

При построении схемы, SPOKE будут направлять DHCP-запрос на HUB-1 и HUB-2, а HUB-1 и HUB-2 в режиме DHCP-Relay будут пересылвать DHCP-запросы на DHCP-сервер. В результате DHCP-сервер выдаст IP-адреса каждому SPOKE:

DHCP-server# show ip dhcp binding 
IP address         MAC / Client ID                                                 Binding type   Lease expires at                  
----------------   -------------------------------------------------------------   ------------   -------------------------------   
192.0.2.3          0x00656c7465782d363831332e653237662e353531612d6772655f31        active         Saturday 1970/02/07 21:29:02      
192.0.2.4          0x00656c7465782d613866392e346261612e626537372d6772655f31        active         Saturday 1970/02/07 21:31:22     

SPOKE-1# show ip interfaces gre 
IP address                                            Interface              Admin   Link    Type      
---------------------------------------------------   --------------------   -----   -----   -------   
192.0.2.3/24                                          gre 1                  Up      Up      DHCP  

SPOKE-2# show ip interfaces gre 
IP address                                            Interface              Admin   Link    Type      
---------------------------------------------------   --------------------   -----   -----   -------   
192.0.2.4/24                                          gre 1                  Up      Up      DHCP 

После получения IP-адресов SPOKE будет регистрироваться на HUB-1 и HUB-2:

HUB-1# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.3              203.0.113.6        gre 1       00:04:01    0,02:47:22       dynamic           LC           
192.0.2.4              203.0.113.10       gre 1       00:04:24    0,02:45:00       dynamic           LC           
HUB-1# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_dynamic                     203.0.113.2       203.0.113.10      0xf4f3279c029b8449   0xad15e1c065158ef4   Established   
ipsec_dynamic                     203.0.113.2       203.0.113.6       0x97ea5b8847405f4f   0xc05fe02c47a9deab   Established   

HUB-2# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.3              203.0.113.6        gre 1       00:05:20    0,02:48:03       dynamic           ULC          
192.0.2.4              203.0.113.10       gre 1       00:05:43    0,02:45:40       dynamic           ULC          
HUB-2# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_dynamic                     203.0.113.14      203.0.113.6       0xbee397e9182ced18   0x4d7dbacd0015c721   Established   
ipsec_dynamic                     203.0.113.14      203.0.113.10      0xc4bc8db4980cc4d3   0x85972117a30c2319   Established   

SPOKE-1# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.1              203.0.113.2        gre 1       --          --               static            RLC          
192.0.2.2              203.0.113.14       gre 1       --          --               static            RLC          
SPOKE-1# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_static_hub2                 203.0.113.6       203.0.113.14      0xbee397e9182ced18   0x4d7dbacd0015c721   Established   
ipsec_static_hub1                 203.0.113.6       203.0.113.2       0x97ea5b8847405f4f   0xc05fe02c47a9deab   Established 

SPOKE-2# show ip nhrp peers 
 Flags: E - unique, R - nhs, U - used, L - lower-up
        C - connected, G - group, Q - qos, N - nat
        P - protected, X - undefined

Tunnel address         NBMA address       Tunnel      Expire      Created          Type              Flags        
--------------------   ----------------   ---------   ---------   --------------   ---------------   ----------   
192.0.2.1              203.0.113.2        gre 1       --          --               static            RLC          
192.0.2.2              203.0.113.14       gre 1       --          --               static            RLC          
SPOKE-2# show security ipsec vpn status 
Name                              Local host        Remote host       Initiator spi        Responder spi        State         
-------------------------------   ---------------   ---------------   ------------------   ------------------   -----------   
ipsec_static_hub1                 203.0.113.10      203.0.113.2       0xf4f3279c029b8449   0xad15e1c065158ef4   Established   
ipsec_static_hub2                 203.0.113.10      203.0.113.14      0xc4bc8db4980cc4d3   0x85972117a30c2319   Established 


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