DMVPN Phase 3 OSPF Routing

Lessons Discussion
3

Hi Harvinder,

Take a look below:

Spoke2#show dmvpn        
Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete
        N - NATed, L - Local, X - No Socket
        T1 - Route Installed, T2 - Nexthop-override
        C - CTS Capable
        # 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: Tunnel0, IPv4 NHRP Details 
Type:Spoke, NHRP Peers:2, 

 # Ent  Peer NBMA Addr Peer Tunnel Add State  UpDn Tm Attrb
 ----- --------------- --------------- ----- -------- -----
     2 192.168.123.2      172.16.123.2    UP 00:01:27   DT2
                          172.16.123.2    UP 00:01:27   DT2
     1 192.168.123.1      172.16.123.1    UP 00:02:57     S

Above you can see two entries for the spoke1 router. When we add the detail parameter, you can see why there are two entries:

Spoke2#show dmvpn detail 
Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete
        N - NATed, L - Local, X - No Socket
        T1 - Route Installed, T2 - Nexthop-override
        C - CTS Capable
        # 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 Tunnel0 is up/up, Addr. is 172.16.123.3, VRF "" 
   Tunnel Src./Dest. addr: 192.168.123.3/MGRE, Tunnel VRF ""
   Protocol/Transport: "multi-GRE/IP", Protect "" 
   Interface State Control: Disabled
   nhrp event-publisher : Disabled

IPv4 NHS:
172.16.123.1  RE priority = 0 cluster = 0
Type:Spoke, Total NBMA Peers (v4/v6): 3

# Ent  Peer NBMA Addr Peer Tunnel Add State  UpDn Tm Attrb    Target Network
----- --------------- --------------- ----- -------- ----- -----------------
    2 192.168.123.2      172.16.123.2    UP 00:01:52   DT2         2.2.2.2/32
      192.168.123.2      172.16.123.2    UP 00:01:52   DT2    172.16.123.2/32
    1 192.168.123.3      172.16.123.3    UP 00:01:52   DLX         3.3.3.3/32
    1 192.168.123.1      172.16.123.1    UP 00:03:22     S    172.16.123.1/32

There’s an entry for 2.2.2.2/32 and 172.16.123.2/32 network.

Hope this helps.

Rene