Admin State Relationships

This section provides additional details about the Admin State field on the Transport Manager > Maintenance > Transport page.

The Admin State tells the MP server what protocol state the Transport should be in. If the Transport protocol state does not match what is expected for the Admin State, the MP server actively tries to resolve the problem until the Admin State and the protocol state match. The relationship between the Admin State and the protocol state is reflected in the Transport Status.

Transport Admin State Relationships
Admin State Operational Status Operational Reason Description
Enabled Down Connecting Trying establishing the SCTP connection in Initiator mode.
Down Listening Trying establishing the SCTP connection or opening UDP socket in Listener mode.
Down Up Pending Valid only for M3UA : SCTP Transport has been established & ASP-UP has been sent, Waiting for ASP-UP-ACK.
Up Normal SIP :
  • For SCTP Transports, SCTP Connection is established after exchanging SCTP Init handshake methods.
  • For UDP Transports, UDP Socket binds and opened for Listen mode.
M3UA :
  • For SCTP Transport, it has reached the ASP-UP state and is available for enabling links.
ENUM : For UDP Transports, UDP Socket binds and opened for Listen mode.
Up Abnormal If one of the Local IP address goes down in SCTP Transport for Multihomed Adjacent nodes.
Down BindFail Valid only for SIP/ENUM : Socket bound fail.
Down Application Disabled Application is down.
Down Forced Standby If the application process was gracefully stopped and the server's HA status is set to Forced Standby.
Disabled Down Disabled Transport is Disabled
Disabled Down Connecting Valid only for M3UA : Trying establishing the SCTP connection. But ASP-UP will not be sent afterwards.
Down Blocked Valid only for M3UA : SCTP Transport has been established. But is has been blocked for any M3UA traffic.