Embedded Packet Capture problem on 2911 serial sub-interface.

[kirilllissitsyn]

  Hi all!

I'm unable to monitor any packets with EPC on Serial interfaces but Ethernet interfaces working just fine. I need exactly WAN monitoring on Serial sub-interfaces (Serial0/0/0:15, Serial0/0/1:15 etc.) because they are connected to our upstream VoIP provider (related to other VoiP problem).

 Is this a software bug or am i missing something? 

 Thanks!

C2900 Software (C2900-UNIVERSALK9_NPE-M), Version 15.7(3)M5

Cisco CISCO2911R-V/K9 (revision 1.0)

2911-3#show monitor capture point all
Status Information for Capture Point CP
IPv4 CEF
Switch Path: IPv4 CEF , Capture Buffer: BUF
Status : Active

Configuration:
monitor capture point ip cef CP Serial0/0/0:15 both

2911-3#show monitor capture buffer BUF para
Capture buffer BUF (linear buffer)
Buffer Size : 15360000 bytes, Max Element Size : 68 bytes, Packets : 0
Allow-nth-pak : 0, Duration : 0 (seconds), Max packets : 0, pps : 0
Associated Capture Points:
Name : CP, Status : Active
Configuration:
monitor capture buffer BUF size 15000 linear
monitor capture point associate CP BUF
2911-3#

[pieterh]

did you issue the start the capture command? : monitor capture point start CP

[kirilllissitsyn]

Of course. If i didn't then the Status would be Inactive. 

[kirilllissitsyn]

The "FUN" thing, that SPAN doesn't recognize Serial interfaces as Source so it's unavailable. 

2911-3(config)#mon session 1 source interface ?
GigabitEthernet GigabitEthernet IEEE 802.3z
Port-channel Ethernet Channel of interfaces

2911-3(config)#

RITE also doesn't work on Serial interfaces. Configuration accepted but 0 packets goes from Se0/0/0:15 to Gi0/2.

So sad

[Giuseppe Larosa]

Hello @kirilllissitsyn ,

if you have ISDN PRI E1 with the provider you can use debug commands to see activity on D channel :15

debug isdn q921         ! L2 ISDN

debug isdn q931         ! L3 ISDN

Hope to help

Giuseppe