Active Directory Health Check

Migrated a DC and wanted to do some basic AD health checks.

From the cmd prompt (domain joined pc with sufficient privileges or on the DC):

Replication Info:

repadmin /replsummary
repadmin /showrepl

Query FSMO role holders, which should confirm that they are online:

netdom query fsmo

General Server Diagnosis:

dcdiag /a /s:<DC server name>

If you want the DC’s to force sync and see if there are any issues:

repadmin /syncall


Cisco Router Packet Capture and Export

I’ve recently had to troubleshoot some SIP calls going through a Cisco router (CUBE) and needed a way to capture the stream and view it easily.

To do this, you will need:

  1. CLI access to the router
  2. Wireshark installed on your PC
  3. tftp server installed on your PC (I used tftpd found here: LINK)

Here are the steps required:

Log into your router and create the capture policy:

ip traffic-export profile <name> mode capture

Assign the capture profile to the interface:

interface <interface>
ip traffic-export apply <name> size 20000000

Clear any data and start the export:

traffic-export interface <interface> clear
traffic-export interface <interface> start

Test your application (or in my case, a SIP call)

Once the test is complete, stop the export:

traffic-export interface <interface> stop

Export the captured traffic to your PC via tftp:

traffic-export interface <interface> copy tftp:

Use Wireshark to open the file, then click “Telephony” at the top and then “VoIP Calls” to analyze the SIP traffic

Also, if you want to send your logs (in case of a debug) to your PC via tftp, the command is:

show logging | redirect tftp://tftpserver/destinationfilename


Cisco CUCM/CUBE SIP Troubleshooting

Some quick notes on troubleshooting tools in a Cisco SIP Call Manager environment:

Commands on the CUBE router:
show call active voice compact
debug ccsip messages
debug voip ccapi inout

Article on understanding SIP traces:

SIP call flows and troubleshooting:

Using CUCM RTMT Session Trace:

Using TranslaterX as an additional tool to Session Trace:

2 Hour Cisco Live breakout on SIP troubleshooting with CUCM and CUBE: