Juniper Networks J-Series manual Monitoring the TGM550 Media Gateway VoIP

Chapter 7: Monitoring the Router and Routing Operations

Table 78: Summary of Key PPPoE Output Fields (continued)

Field	Values
PADI Resend	Initial time, (in seconds) the Services Router waits
Timeout	to receive a PADO packet for the PADI packet
	sent—for example, 2 seconds. This timeout
	doubles for each successive PADI packet sent.

Additional Information

The PPPoE Active Discovery Initiation (PADI) packet is sent to the access concentrator to initiate a PPPoE session. Typically, the access concentrator responds to a PADI packet with a PPPoE Active Discovery Offer (PADO) packet. If the access concentrator does not send a PADO packet, the Services Router sends the PADI packet again after timeout period is elapsed. The PADI Resend Timeout doubles for each successive PADI packet sent. For example, if the PADI Resend Timeout is 2 seconds, the second PADI packet is sent after 2 seconds, the third after 4 seconds, the fourth after 8 seconds, and so on.

PADR Resend	Initial time (in seconds) the Services Router waits
Timeout	to receive a PADS packet for the PADR packet
	sent. This timeout doubles for each successive
	PADR packet sent.

Maximum Resend	Maximum value (in seconds) that the PADI or
Timeout	PADR resend timer can accept—for example, 64
	seconds. The maximum value is 64.
Maximum	Time (in seconds), within which the configured
Configured AC	access concentrator must respond.
Timeout

The PPPoE Active Discovery Request (PADR) packet is sent to the access concentrator in response to a PADO packet, and to obtain the PPPoE session ID. Typically, the access concentrator responds to a PADR packet with a PPPoE Active Discovery Session-Confirmation (PADS) packet, which contains the session ID. If the access concentrator does not send a PADS packet, the Services Router sends the PADR packet again after the PADR Resend Timeout period is elapsed. The PADR Resend Timeout doubles for each successive PADR packet sent.

Monitoring the TGM550 Media Gateway (VoIP)

J4350 and J6350 Services Routers support voice over IP (VoIP) routing through an Avaya TGM550 Telephony Gateway Module and one or more Telephony Interface Modules (TIMs) installed in the router. From the J-Web interface or the JUNOS CLI, you can monitor the vp-pim/0/0interface to the TGM550 (see “Monitoring the Interfaces” on page 113). In addition, you can monitor dynamic call admission control (CAC) operation, if it is configured on the router WAN interfaces, and also the list of Media Gateway Controllers (MGCs) configured on the TGM550.

To display TGM550 information, select Monitor>Media Gateway in the J-Web interface.

Alternatively, enter the following commands in the CLI operational mode:

Using the Monitoring Tools ■ 151