04-13-2014 01:59 PM - edited 03-03-2019 07:21 AM
ASR 1002 running 12.2(33)XND3. We're seeing the %LINEPROTO-5-UPDOWN log message every 5 to 15 minutes, always "changed state to up" despite there never having been any tunnel interface configured on the box.
Additionally, we do get output from the "show interface tunnel1" command:
CADBEWEFMP650#sh int tu1
Tunnel1 is up, line protocol is up
Hardware is Tunnel
Interface is unnumbered. Using address of GigabitEthernet0/0/0.1 (10.137.3.178)
MTU 17872 bytes, BW 100 Kbit, DLY 50000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.137.3.178 (GigabitEthernet0/0/0.1), destination 146.194.1.131
Tunnel protocol/transport PIM/IPv4, key
Tunnel TOS/Traffic Class 0xC0, Tunnel TTL 255
Tunnel transport MTU 1480 bytes
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
CADBEWEFMP650#
Clearly, I'm missing something here. Could this perhaps be some sort of tunnel that is dynamically created, without requiring actual configuration?
Solved! Go to Solution.
04-14-2014 05:53 AM
Hi there,
This is normal behaviour when you have 'ipv6 multicast-routing' (PIM-SM) in your configuration.
With IPv6, this tunnel is used for the PIM register process.
cheers,
Seb.
04-14-2014 05:53 AM
Hi there,
This is normal behaviour when you have 'ipv6 multicast-routing' (PIM-SM) in your configuration.
With IPv6, this tunnel is used for the PIM register process.
cheers,
Seb.
08-31-2015 10:46 PM
Hi,
I see the same issue, but i have ip multicast-routing (ipv4) configured.
%LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up
Seeing the above message continuously. Is this can be ignored as the PIM register process?
09-01-2015 12:22 AM
Hi there,
These tunnels are created by the Multicast forwarding Information Base during the PIM sparse-mode registration process, irrespective of IP protocol.
Take a look here:
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_mfib/configuration/xe-3s/imc-mfib-xe-3s-book/imc_verify_mfib.html#GUID-C599FACD-6348-451D-831B-5941F26C5760
cheers,
Seb.
09-01-2015 12:31 AM
Thanks a lot Seb.
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