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Monitoring SIP ALG Counters

To view SIP ALG counters information, select Monitor>ALGs>SIP>Counters in the J-Web interface, or enter the following CLI command:

Table 27 summarizes key output fields in the SIP counters display.

Table 27: Summary of Key SIP Counters Output Fields

Field

Values

Additional Information

SIP Counters Information

INVITE

Number of INVITE requests sent.

An INVITE request is sent to invite another user to participate in a session.

CANCEL

Number of CANCEL requests sent.

A user can send a CANCEL request to cancel a pending INVITE request. A CANCEL request has no effect if the SIP server processing the INVITE had sent a final response for the INVITE before it received the CANCEL.

ACK

Number of ACK requests sent.

The user from whom the INVITE originated sends an ACK request to confirm reception of the final response to the INVITE request.

BYE

Number of BYE requests sent.

A user sends a BYE request to abandon a session. A BYE request from either user automatically terminates the session.

REGISTER

Number of REGISTER requests sent.

A user sends a REGISTER request to a SIP registrar server to inform it of the current location of the user. A SIP registrar server records all the information it receives in REGISTER requests and makes this information available to any SIP server attempting to locate a user.

OPTIONS

Number of OPTIONS requests sent.

An OPTION message is used by the User Agent (UA) to obtain information about the capabilities of the SIP proxy. A server responds with information about what methods, session description protocols, and message encoding it supports.

INFO

Number of INFO requests sent.

An INFO message is used to communicate mid-session signaling information along the signaling path for the call.

MESSAGE

Number of MESSAGE requests sent.

SIP messages consist of requests from a client to a server and responses to the requests from a server to a client with the purpose of establishing a session (or a call).

NOTIFY

Number of NOTIFY requests sent.

A NOTIFY message is sent to inform subscribers of changes in state to which the subscriber has a subscription.

REFER

Number of REFER requests sent.

A REFER request is used to refer the recipient (identified by the Request-URI) to a third party by the contact information provided in the requst.

SUBSCRIBE

Number of SUBSCRIBE requests sent.

A SUBSCRIBE request is used to request current state and state updates from a remote node.

UPDATE

Number of UPDATE requests sent.

An UPDATE request is used to create a temporary opening in the firewall (pinhole) for new or updated Session Description Protocol (SDP) information. The following header fields are modified: Via, From, To, Call-ID, Contact, Route, and Record-Route.

SIP Error Counters

Total Pkt-in

SIP ALG total packets received.

 

Total Pkt dropped on error

Number of packets dropped by the SIP ALG.

 

Transaction error

SIP ALG transaction errors.

 

Call error

SIP ALG call errors.

 

IP resolve error

SIP ALG IP address resolution errors.

 

NAT error

SIP ALG NAT errors.

 

Resource manager error

SIP ALG resource manager errors.

 

RR header exceeded max

Number of times the SIP ALG RR (Record-Route) headers exceeded the maximum limit.

 

Contact header exceeded max

Number of times the SIP ALG contact header exceeded the maximum limit.

 

Call dropped due to limit

SIP ALG calls dropped because of call limits.

 

SIP stack error

SIP ALG stack errors.

 

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