! Configure directly connected neighbors with iBGP and Tunnels hostname hub interface Loopback0  ip address 1.1.1.1 255.255.255.255 ! interface Tunnel1  ip address 10.0.0.1 255.255.255.252  no ip redirects  ip nhrp authentication cisco  ip nhrp map 10.0.0.2 172.16.0.6  ip nhrp network-id 1  tunnel source GigabitEthernet4  tunnel mode gre multipoint  tunnel key 1 ! interface GigabitEthernet4  ip address 172.16.0.5 255.255.255.252  negotiation auto  no mop enabled  no mop sysid ! router bgp 65000  bgp router-id 1.1.1.1  bgp log-neighbor-changes  bgp listen range 10.0.0.0/24 peer-group tst  no bgp default ipv4-unicast  neighbor tst peer-group  neighbor tst remote-as 65000  !  address-family ipv4   network 1.1.1.1 mask 255.255.255.255   network 172.16.0.5   neighbor tst activate   neighbor tst route-reflector-client  exit-address-family ! --------------------- hostname spoke1 interface Loopback0  ip address 3.3.3.3 255.255.255.255 ! interface Tunnel1  ip address 10.0.0.2 255.255.255.252  ip nhrp authentication cisco  ip nhrp map 10.0.0.1 172.16.0.5  ip nhrp network-id 1  ip nhrp nhs 10.0.0.1  tunnel source GigabitEthernet4  tunnel destination 172.16.0.5  tunnel key 1 ! interface GigabitEthernet4  ip address 172.16.0.6 255.255.255.252  negotiation auto  no mop enabled  no mop sysid ! router bgp 65000  bgp router-id 3.3.3.3  bgp log-neighbor-changes  no bgp default ipv4-unicast  neighbor 10.0.0.1 remote-as 65000  !  address-family ipv4   network 3.3.3.3 mask 255.255.255.255   neighbor 10.0.0.1 activate  exit-address-family ! ---------------------- hub#show dmvpn Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete         N - NATed, L - Local, X - No Socket         T1 - Route Installed, T2 - Nexthop-override, B - BGP         C - CTS Capable, I2 - Temporary         # Ent --> Number of NHRP entries with same NBMA peer         NHS Status: E --> Expecting Replies, R --> Responding, W --> Waiting         UpDn Time --> Up or Down Time for a Tunnel ========================================================================== Interface: Tunnel1, IPv4 NHRP Details  Type:Spoke, NHRP Peers:1,   # Ent  Peer NBMA Addr Peer Tunnel Add State  UpDn Tm Attrb  ----- --------------- --------------- ----- -------- -----      1 172.16.0.6             10.0.0.2  NHRP    never    SC ! hub#show ip nhrp  10.0.0.2/32 via 10.0.0.2    Tunnel1 created 00:49:40, never expire     Type: static, Flags:     NBMA address: 172.16.0.6  ! hub#show ip int br | i Tunnel Tunnel1                10.0.0.1        YES manual up                    up ! hub#show int tunnel1 Tunnel1 is up, line protocol is up    Hardware is Tunnel   Internet address is 10.0.0.1/30   MTU 9972 bytes, BW 100 Kbit/sec, DLY 50000 usec,       reliability 255/255, txload 1/255, rxload 1/255   Encapsulation TUNNEL, loopback not set   Keepalive not set   Tunnel linestate evaluation up   Tunnel source 172.16.0.5 (GigabitEthernet4) ! hub#show ip bgp summ BGP router identifier 1.1.1.1, local AS number 65000 BGP table version is 3, main routing table version 3 2 network entries using 496 bytes of memory 2 path entries using 272 bytes of memory 2/2 BGP path/bestpath attribute entries using 576 bytes of memory 0 BGP route-map cache entries using 0 bytes of memory 0 BGP filter-list cache entries using 0 bytes of memory BGP using 1344 total bytes of memory BGP activity 2/0 prefixes, 2/0 paths, scan interval 60 secs 2 networks peaked at 16:20:39 Aug 25 2025 UTC (00:19:37.116 ago) Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd *10.0.0.2       4        65000      26      26        3    0    0 00:19:36        1 * Dynamically created based on a listen range command Dynamically created neighbors: 1, Subnet ranges: 1 BGP peergroup tst listen range group members:    10.0.0.0/24  Total dynamically created neighbors: 1/(100 max), Subnet ranges: 1 ! hub#show ip bgp | b Network      Network          Next Hop            Metric LocPrf Weight Path  *>   1.1.1.1/32       0.0.0.0                  0         32768 i  *>i  3.3.3.3/32       10.0.0.2                 0    100      0 i ! hub#ping 3.3.3.3 # See screenshot 2025-08-25-1142 for Wireshark output