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Cisco Bug: CSCuq38657 - Multiple blank lines shows up in 'show dmvpn detail' output

Last Modified

Nov 27, 2020

Products (25)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco 7301 Router
  • Cisco 7206 Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco 7204 Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco 7206VXR Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases

15.2(4)S 15.2(4)S1 15.3(3)S2

Description (partial)

Multiple blank lines are seen in the 'show dmvpn detail' output right after the 'Pending DMVPN Sessions' section when there are multiple crypto sessions in 'Down-Negotiating' state. 

So, normally, when all the crypto sessions are in 'UP-ACTIVE' state, we only see a single blank line below the 'Pending DMVPN Sessions' section in the 'show dmvpn detail' output however when there is a single 'Down-Negotiating' crypto session, we're seeing two blank lines and the number of blank lines increases to a large number when there are a lot of crypto sessions in 'Down-Negotiating' state in a DMVPN setup.

When the crypto session for a DMVPN tunnel goes in 'Down-Negotiating' state, the output of 'show dmvpn detail' shows a blank line right after 'Pending DMVPN Sessions' section per 'Down-Negotiating' session. So, if there is one crypto session in 'Down Negotiating' state, we'll see two blank lines below the 'Pending DMVPN Sessions' section.

Hub-R1#show dmv detail
Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete
        N - NATed, L - Local, X - No Socket
        # 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, VRF ""
   Tunnel Src./Dest. addr:, Tunnel VRF ""
   Protocol/Transport: "multi-GRE/IP", Protect "DMVPN"
   Interface State Control: Disabled
   nhrp event-publisher : Disabled
Type:Hub, Total NBMA Peers (v4/v6): 1

# Ent  Peer NBMA Addr Peer Tunnel Add State  UpDn Tm Attrb    Target Network
----- --------------- --------------- ----- -------- ----- -----------------
    1        UP 00:22:20    D

Crypto Session Details:

Interface: Tunnel0
Session: [0xF0198EC0]
  IKEv1 SA: local remote Active
          Capabilities:(none) connid:1001 lifetime:23:37:39
  Crypto Session Status: UP-ACTIVE
  fvrf: (none), Phase1_id:
  IPSEC FLOW: permit 47 host host
        Active SAs: 2, origin: crypto map
        Inbound:  #pkts dec'ed 308 drop 0 life (KB/Sec) 4197513/2259
        Outbound: #pkts enc'ed 310 drop 0 life (KB/Sec) 4197513/2259
   Outbound SPI : 0x540DB8E8, transform : esp-aes esp-sha-hmac
    Socket State: Open

Pending DMVPN Sessions:
                                              >>>>>One blank line (which already existed)
                			      >>>>>Another blank line appears when one of the tunnels is down & is in 'Down-Negotiating' state
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