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  • DMVPN Phase 1 Single Hub – EIGRP – Spoke example

    Design & Configure

    DMVPN Phase 1 Single Hub – EIGRP – Spoke example

    Technology: WAN
    Area: DMVPN
    Vendor: Cisco
    Software: 12.X , 15.X ISR
    Platform: ISR 1800, 2800, 3800, 1900, 2900, 3900, Platforms: 4300, 4400

    Traffic Flow:

    • Packet is sent from Spoke1 to Spoke2 network via Hub (according to routing table)
    • Spoke1 has this prefix via HUB tunnel IP for which has also NHRP static mapping
    • Hub routes packet to Spoke2 according to routing table via tunnel

    DMVPN Phase 1 and EIGRP:

    • Configure spokes as a stubs
    • Advertise their connected routes
    • Disable split horizon on hub (Spoke to Spoke prefix advertisement)
    • Use next-hop self command (default)

     

    DMVPN Phase 1 Single Hub Configuration - EIGRP


    R2:
    !
    !
    router eigrp 111
    no auto-summary
    network 172.16.1.0 0.0.0.255
    network 10.1.2.0 0.0.0.255
    eigrp stub connected
    !
    interface Loopback0
    ip address 10.149.2.2 255.255.255.0
    !
    interface Loopback 1
    ip address 10.1.2.2 255.255.255.0
    !
    ! GRE tunnel
    !
    interface Tunnel0
    ip address 172.16.1.2 255.255.255.0
    ip nhrp authentication gmlabs
    ip nhrp map 172.16.1.1 10.149.1.1
    ip nhrp map multicast 10.149.1.1
    ip nhrp nhs 172.16.1.1
    ip nhrp network-id 111
    ip nhrp holdtime 60
    ip nhrp registration timeout 30
    tunnel source Loopback0
    tunnel destination 10.149.1.1
    tunnel key 123

     

    Author: Marcin Bialy
     
    Grandmetric