Simplified Networking
  • Home
  • Technology VoD!
    • Cisco >
      • Route & Switch / Enterprise Infrastructure
  • Technology Breakdowns!
    • Route&Switch/Ent. Infra. >
      • L2 Technologies
      • L3 Technologies
      • VPN Technologies
      • Services >
        • IOS - Dynamic NAT
        • HSRP - IPv4 Setup
        • HSRP - Priority and Preemption
    • Service Provider >
      • IGPs (Interior Gateway Protocols)
      • First Hop Redundancy >
        • HSRP (Hot Standby Router Protocol) >
          • HSRP - IOS/IOS XE Setup
          • HSRP - IOS XR Setup
      • BGP (Border Gateway Protocol)
      • Inter AS Multicast (MSDP)
      • Intra-AS MPLS
      • Inter-AS MPLS
    • Security >
      • IOS Firewall
      • ASA Firewall
      • FirePOWER Threat Defense >
        • FTD - FTD NGFW Device Setup and FMC Integration
      • VPNs >
        • PKI
        • Site to Site VPNs
        • Remote Access VPNs >
          • IOS Remote Access
          • ASA Remote Access
    • Data Center >
      • Nexus 9000v >
        • Nexus 9000v - Enabling Features
        • Nexus 9000v - VLANs and Trunks
        • Nexus 9000v - LACP Port Channels
        • Nexus 9000v - vPC (Virtual Port Channel)
        • Nexus 9000v - OSPFv2
        • Nexus 9000v - VXLAN - Ingress Replication Flood and Learn
        • Nexus 9000v - IP Multicast
        • Nexus 9000v - VxLAN - Multicast Flood and Learn
        • Nexus 9000v - VxLAN - BGP EVPN with Multicast
        • Nexus 9000v - VxLAN - BGP EVPN w/Ingress Replication
        • Nexus 9000v - VxLAN - Inter-VxLAN Routing with BGP EVPN
        • Nexus 9000v - VXLAN - External Routing
      • Nexus 7000v
    • Palo Alto

DMVPN Phase 2

Picture
Phase 2 is an Routing Protocol modification, here with EIGRP, split horizon is disabled which allows for the routes from the spokes to be propagated back out the tunnel to the other spokes.

IOS33#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/24 is subnetted, 5 subnets
D        10.1.1.0 
           [90/26880256] via 172.16.103.24, 00:16:54, GigabitEthernet0/0
D        10.3.9.0 
           [90/26880768] via 172.16.103.24, 00:16:49, GigabitEthernet0/0
D        10.3.22.0 
           [90/26880512] via 172.16.103.24, 00:16:49, GigabitEthernet0/0
D        10.4.9.0 
           [90/26880768] via 172.16.103.24, 00:16:49, GigabitEthernet0/0
D        10.4.22.0 
           [90/26880512] via 172.16.103.24, 00:16:49, GigabitEthernet0/0
      22.0.0.0/32 is subnetted, 1 subnets
D        22.22.22.22 
           [90/27008256] via 172.16.103.24, 00:16:49, GigabitEthernet0/0
      24.0.0.0/32 is subnetted, 1 subnets
D        24.24.24.24 
           [90/130816] via 172.16.103.24, 22:24:49, GigabitEthernet0/0
      33.0.0.0/32 is subnetted, 1 subnets
C        33.33.33.33 is directly connected, Loopback0
      172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
D        172.16.101.0/24 
           [90/26880768] via 172.16.103.24, 00:16:49, GigabitEthernet0/0
C        172.16.103.0/24 is directly connected, GigabitEthernet0/0
L        172.16.103.33/32 is directly connected, GigabitEthernet0/0


IOS22
interface Tunnel1
 no ip split-horizon eigrp 1

%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.24 (Tunnel1) is resync: split horizon changed
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.11 (Tunnel1) is resync: split horizon changed
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.1.1.25 (Tunnel1) is resync: split horizon changed


IOS33#sh ip route eigrp 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/24 is subnetted, 9 subnets
D        10.1.1.0 
           [90/26880256] via 172.16.103.24, 00:18:59, GigabitEthernet0/0
D        10.3.9.0 
           [90/26880768] via 172.16.103.24, 00:18:54, GigabitEthernet0/0
D        10.3.22.0 
           [90/26880512] via 172.16.103.24, 00:18:54, GigabitEthernet0/0
D        10.4.9.0 
           [90/26880768] via 172.16.103.24, 00:18:54, GigabitEthernet0/0
D        10.4.22.0 
           [90/26880512] via 172.16.103.24, 00:18:54, GigabitEthernet0/0
D        10.11.19.0 
           [90/28160512] via 172.16.103.24, 00:00:49, GigabitEthernet0/0
D EX     10.102.12.0 
           [170/28160768] via 172.16.103.24, 00:00:49, GigabitEthernet0/0
D EX     10.102.15.0 
           [170/28160768] via 172.16.103.24, 00:00:49, GigabitEthernet0/0
D EX     10.102.25.0 
           [170/28160512] via 172.16.103.24, 00:00:49, GigabitEthernet0/0
      19.0.0.0/32 is subnetted, 1 subnets
D        19.19.19.19 
           [90/28288512] via 172.16.103.24, 00:00:49, GigabitEthernet0/0
      20.0.0.0/32 is subnetted, 1 subnets
D EX     20.20.20.20 
           [170/28288512] via 172.16.103.24, 00:00:49, GigabitEthernet0/0
      22.0.0.0/32 is subnetted, 1 subnets
D        22.22.22.22 
           [90/27008256] via 172.16.103.24, 00:18:54, GigabitEthernet0/0
      24.0.0.0/32 is subnetted, 1 subnets
D        24.24.24.24 
           [90/130816] via 172.16.103.24, 22:26:54, GigabitEthernet0/0
      172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
D        172.16.101.0/24 
           [90/26880768] via 172.16.103.24, 00:18:54, GigabitEthernet0/0


IOS33#traceroute 20.20.20.20 source loopback 0 num
Type escape sequence to abort.
Tracing the route to 20.20.20.20
VRF info: (vrf in name/id, vrf out name/id)
  1 172.16.103.24 22 msec 14 msec 11 msec
  2 10.1.1.22 31 msec 25 msec 22 msec
  3 10.1.1.25 49 msec 42 msec 44 msec
  4 20.20.20.20 57 msec 44 msec 36 msec
Powered by Create your own unique website with customizable templates.
  • Home
  • Technology VoD!
    • Cisco >
      • Route & Switch / Enterprise Infrastructure
  • Technology Breakdowns!
    • Route&Switch/Ent. Infra. >
      • L2 Technologies
      • L3 Technologies
      • VPN Technologies
      • Services >
        • IOS - Dynamic NAT
        • HSRP - IPv4 Setup
        • HSRP - Priority and Preemption
    • Service Provider >
      • IGPs (Interior Gateway Protocols)
      • First Hop Redundancy >
        • HSRP (Hot Standby Router Protocol) >
          • HSRP - IOS/IOS XE Setup
          • HSRP - IOS XR Setup
      • BGP (Border Gateway Protocol)
      • Inter AS Multicast (MSDP)
      • Intra-AS MPLS
      • Inter-AS MPLS
    • Security >
      • IOS Firewall
      • ASA Firewall
      • FirePOWER Threat Defense >
        • FTD - FTD NGFW Device Setup and FMC Integration
      • VPNs >
        • PKI
        • Site to Site VPNs
        • Remote Access VPNs >
          • IOS Remote Access
          • ASA Remote Access
    • Data Center >
      • Nexus 9000v >
        • Nexus 9000v - Enabling Features
        • Nexus 9000v - VLANs and Trunks
        • Nexus 9000v - LACP Port Channels
        • Nexus 9000v - vPC (Virtual Port Channel)
        • Nexus 9000v - OSPFv2
        • Nexus 9000v - VXLAN - Ingress Replication Flood and Learn
        • Nexus 9000v - IP Multicast
        • Nexus 9000v - VxLAN - Multicast Flood and Learn
        • Nexus 9000v - VxLAN - BGP EVPN with Multicast
        • Nexus 9000v - VxLAN - BGP EVPN w/Ingress Replication
        • Nexus 9000v - VxLAN - Inter-VxLAN Routing with BGP EVPN
        • Nexus 9000v - VXLAN - External Routing
      • Nexus 7000v
    • Palo Alto