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"not connected" SPAN ports

silvio1989
Level 1
Level 1

Hi all,

 

I have configured some 6509 ports in SPAN mode with an active monitor session. In particular I have configured one port on a catalyst and another port on another catalyst in order to sniff the traffic passing through this domain (composed by the two 6k).

On both catalysts, doing the "sh int gix/x" on the SPAN ports, the  "GigabitEthernet1/29 is up, line protocol is down (monitoring)" message appears. 

By contrast when I do "sh int status" on the first catalyst the SPAN port is in the monitoring status whereas on the second catalyst doing the "sh int status" the SPAN port is in "not connected" status.

This port's led is green, the cable is not broken so I would like to know if this second SPAN port is working properly also if the "sh int status" shows the "not connected status".

Hoping to have been clear I thank you in advance.

Silvio

1 Accepted Solution

Accepted Solutions

Edit: bug below references 6000 switch.

CSCee77136

Same trouble description as SCSed18022 but references 6000 switch and sup engine.

 

*************************************************************************************************

 

Hi silvio1989,

Sounds identical to bug CSCed18022.  Its referencing a 4000 switch and not a 6500 switch.  I'll look for a similar bug related to a 6500 switch.  See below.

 

SPAN dest port should not be shown as notconnected
CSCed18022

Symptom:

Configure a port as SPAN destination, and then run "show interface status", the
status of the SPAN destiantion port is shown as "notconnected" although the port
is actually connected to the monitoring station.

Condition:
N/A.

Workaround:

No.

 

Hope this helps,

Please rate helpful posts. 

Thanks,

View solution in original post

9 Replies 9

Charles Hill
VIP Alumni
VIP Alumni

Hello silvio1989,

Rspan is needed to span traffic from one switch to another switch.

 

See link below.

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/span.html

 

Hope this helps,

Please rate helpful posts.

Thanks.

Hi Charles,

 

I have always configured SPAN in this way: 

monitor session 5 source vlan 1040 , 1064 , 1123 , 1143 , 1163
monitor session 5 destination interface Gi1/29

with

interface GigabitEthernet1/29
 description Sonda Shark
 no ip address
 no snmp trap link-status
 switchport
 switchport mode access
 no cdp enable
end

 

I have encountered this issue in the sh int status just this time... The strange thing is that if I do sh int gi1/29 I see "5 minute output rate 40378000 bits/sec, 3346 packets/sec" so I reckon that it is spanning traffic. 
But why the port is in not connected status!? :O

 

 

 

 

Are you saying, with sh int gi1/29 -- it says "monitoring"

sh int status ---> not connected ...

 

is this your questions.

 

Please post the output also here for better understanding.

Hi!

Exactely! This is the issue!

Here there are the output:

 

#sh int gi1/29
GigabitEthernet1/29 is up, line protocol is down (monitoring)
  Hardware is C6k 1000Mb 802.3, address is 0011.9336.9c44 (bia 0011.9336.9c44)
  Description: Sonda Shark
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 2/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Full-duplex, 1000Mb/s
  input flow-control is off, output flow-control is on
  Clock mode is auto
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 6y30w
  Input queue: 0/2000/12/0 (size/max/drops/flushes); Total output drops: 4
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 8212000 bits/sec, 714 packets/sec
     3129242757 packets input, 839789764257 bytes, 0 no buffer
     Received 13 broadcasts, 0 runts, 0 giants, 0 throttles
     12 input errors, 2 CRC, 0 frame, 1195 overrun, 0 ignored
     0 input packets with dribble condition detected
     6867195564 packets output, 2541371809115 bytes, 0 underruns
     4 output errors, 0 collisions, 2 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

 

 

#sh int status | i Gi1/29
Gi1/29  Sonda Shark        notconnect   1          a-full a-1000/10/100/1000BaseT

 

I have tried to shut/no shut the port, I changed the speed and the duplex but nothing happened.

 

 

Edit: bug below references 6000 switch.

CSCee77136

Same trouble description as SCSed18022 but references 6000 switch and sup engine.

 

*************************************************************************************************

 

Hi silvio1989,

Sounds identical to bug CSCed18022.  Its referencing a 4000 switch and not a 6500 switch.  I'll look for a similar bug related to a 6500 switch.  See below.

 

SPAN dest port should not be shown as notconnected
CSCed18022

Symptom:

Configure a port as SPAN destination, and then run "show interface status", the
status of the SPAN destiantion port is shown as "notconnected" although the port
is actually connected to the monitoring station.

Condition:
N/A.

Workaround:

No.

 

Hope this helps,

Please rate helpful posts. 

Thanks,

Hi,

 

I hope so.. but how can I justify this behaviour if there is nothing officially related to this bug on CISCO 600 series !?

Ah ok! I had not seen the first two lines of your answer.. so... the case is closed! :D Thank you very much!

Your welcome.

Hi All,

Will SNMP trap work on SPAN destination port?

 

Regards,

Godwin. S

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