[c-nsp] Mysterious tunnel interfaces

[Luan Nguyen]

I have those ISR2 (M1) as well as ASR1002 running DMVPN and don't have those
ghost tunnels.  Must be for some other services such as multicast.
Try to remove them with no interface tunnel 0, and I think the router will
tell you why you couldn't.

Regards,

-Luan

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jay Nakamura
Sent: Wednesday, August 11, 2010 8:53 PM
To: cisco-nsp
Subject: [c-nsp] Mysterious tunnel interfaces

I was working on a ISR 1941 with 15.0(1)M2.  I am running DMVPN on it
and using one tunnel interface.  (Tunnel 1).  No other tunnel
interfaces are configured on the router.  However when I do "show int
summary" I get this;

#sh int summary

 *: interface is up
 IHQ: pkts in input hold queue     IQD: pkts dropped from input queue
 OHQ: pkts in output hold queue    OQD: pkts dropped from output queue
 RXBS: rx rate (bits/sec)          RXPS: rx rate (pkts/sec)
 TXBS: tx rate (bits/sec)          TXPS: tx rate (pkts/sec)
 TRTL: throttle count

  Interface              IHQ   IQD  OHQ   OQD  RXBS RXPS  TXBS TXPS TRTL
------------------------------------------------------------------------
* GigabitEthernet0/0       0     0    0     0  6000    5  6000    5    0
  GigabitEthernet0/1       0     0    0     0     0    0     0    0    0
* Serial0/0/0              0     0    0     0  3000    3  2000    2    0
  NVI0                     0     0    0     0     0    0     0    0    0
* Tunnel0                  0     0    0     0     0    0     0    0    0
* Tunnel1                  0     0    0    10  1000    2  1000    2    0
* Tunnel2                  0     0    0     0     0    0     0    0    0
* Tunnel3                  0     0    0     0     0    0     0    0    0

I thought may be something got left behind while I was monkeying
around in it so I reloaded the router and the tunnel 0,2,3 are still
there and it says it's up.   None of those interfaces are in the
startup or running-config.

What is going on here?  My other routers with similar config on a 1841
with 12.4(15)T* doesn't have this issue.  It doesn't seem to be
affecting the routing of traffic but it's really bothering me.

-Jay
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