VoIP Ethernet Capture: Difference between revisions

Revision as of 09:38, 4 March 2011

The Tmedia product can configure one of its VoIP Ethernet ports to do Port Mirroring. This is useful when investigating RTP, Codecs or IP Tones issues.

Warning: When configuring a port as a mirror, it is important to connect that Ethernet port directly to a host. Otherwise, it will create problem with to the Ethernet switch

Physical Setup

To do a VoIP capture it is required to:

Connect one of the VoIP Ethernet port to a laptop with Wireshark installed and 1Gbs Network card.

TMG800

Once the physical setup is ready. It is possible to start capturing the RTP.

Access to the Tmedia unit using SSH.
Access the telecom baseboard of the Tmedia using telnet.

telnet 172.31.1.1

Start Wireshark to capture the Ethernet packets with the connected laptop.
Do one of the following command to capture packets according to your setup.

Capture VoIP0 with VoIP1

For capturing all Ethernet packets that goes through VoIP0 with VoIP1

mv88eMonitor 0x1 0x1 1

To stop the capture

mv88eMonitor 0 0 1

Capture VoIP1 with VoIP0

For capturing all Ethernet packets that goes through VoIP1 with VoIP0

mv88eMonitor 0x2 0x2 0

To stop the capture

mv88eMonitor 0 0 0

TMG3200

Once the physical setup is ready. It is possible to start capturing the RTP.

Start Wireshark to capture the Ethernet packets with the connected laptop.
Do one of the following command to capture packets according to your setup.
Access to the Tmedia unit using SSH.
Access the telecom baseboard of the Tmedia using telnet.

telnet 172.31.1.1

Start Wireshark to capture the Ethernet packets with the connected laptop.
Do one of the following command to capture packets according to your setup.

Capture VoIP0 with VoIP1

For capturing all Ethernet packets that goes through VoIP0 with VoIP1

mv88eMonitor 0x4 0x4 3

To stop the capture

mv88eMonitor 0 0 3

Capture VoIP1 with VoIP0

For capturing all Ethernet packets that goes through VoIP1 with VoIP0

mv88eMonitor 0x8 0x8 2

To stop the capture

mv88eMonitor 0 0 2

TMG7800

Once the physical setup is ready. It is possible to start capturing the RTP.

Start Wireshark to capture the Ethernet packets with the connected laptop.
Do one of the following command to capture packets according to your setup.
Access to the TMG7800-CTRL unit using SSH.
Access the telecom unit (TMG7800-TE, TMG7800-DS3 or TMG7800-STM1) using telnet.

telnet [eth0 IP address of the telecom unit]

Start Wireshark to capture the Ethernet packets with the connected laptop.
Do one of the following command to capture packets according to your setup.

Capture VoIP0 with VoIP1

For capturing all Ethernet packets that goes through VoIP0 with VoIP1

mv88eMonitor 0x4 0x4 3

To stop the capture

mv88eMonitor 0 0 3

Capture VoIP1 with VoIP0

For capturing all Ethernet packets that goes through VoIP1 with VoIP0

mv88eMonitor 0x8 0x8 2

To stop the capture

mv88eMonitor 0 0 2

@@ Line 2: / Line 2: @@
 '''Warning''': When configuring a port as a mirror, it is important to connect that Ethernet port directly to a host. Otherwise, it will create problem with to the Ethernet switch
 == Physical Setup ==
 To do a VoIP capture it is required to:
 *Connect one of the VoIP Ethernet port to a laptop with [http://www.wireshark.org/ Wireshark] installed and 1Gbs Network card.
+== TMG800 ==
+Once the physical setup is ready. It is possible to start capturing the RTP.
 *Access to the [[Tmedia]] unit using SSH.
 *Access the telecom baseboard of the [[Tmedia]] using telnet.
   telnet 172.31.1.1
+*Start Wireshark to capture the Ethernet packets with the connected laptop.
+*Do one of the following command to capture packets according to your setup.
+=== Capture VoIP0 with VoIP1 ===
+*For capturing all Ethernet packets that goes through VoIP0 with VoIP1
+ mv88eMonitor 0x1 0x1 1
+*To stop the capture
+ mv88eMonitor 0 0 1
+=== Capture VoIP1 with VoIP0 ===
+*For capturing all Ethernet packets that goes through VoIP1 with VoIP0
+ mv88eMonitor 0x2 0x2 0
+*To stop the capture
+ mv88eMonitor 0 0 0
+== TMG3200 ==
+Once the physical setup is ready. It is possible to start capturing the RTP.
+*Start Wireshark to capture the Ethernet packets with the connected laptop.
+*Do one of the following command to capture packets according to your setup.
+*Access to the [[Tmedia]] unit using SSH.
+*Access the telecom baseboard of the [[Tmedia]] using telnet.
+ telnet 172.31.1.1
+*Start Wireshark to capture the Ethernet packets with the connected laptop.
+*Do one of the following command to capture packets according to your setup.
+=== Capture VoIP0 with VoIP1 ===
+*For capturing all Ethernet packets that goes through VoIP0 with VoIP1
+ mv88eMonitor 0x4 0x4 3
+*To stop the capture
+ mv88eMonitor 0 0 3
-Note: 172.31.1.1 is the default IP of the TMG's Telecom module.
+=== Capture VoIP1 with VoIP0 ===
+*For capturing all Ethernet packets that goes through VoIP1 with VoIP0
+ mv88eMonitor 0x8 0x8 2
+*To stop the capture
+ mv88eMonitor 0 0 2
-== Start Capturing ==
+== TMG7800 ==
 Once the physical setup is ready. It is possible to start capturing the RTP.
+*Start Wireshark to capture the Ethernet packets with the connected laptop.
+*Do one of the following command to capture packets according to your setup.
+*Access to the [[TMG7800-CTRL]] unit using SSH.
+*Access the telecom unit ([[TMG7800-TE]], [[TMG7800-DS3]] or [[TMG7800-STM1]]) using telnet.
+ telnet [eth0 IP address of the telecom unit]
 *Start Wireshark to capture the Ethernet packets with the connected laptop.
 *Do one of the following command to capture packets according to your setup.