Query Regarding MG -MGC behavior

Hi All,

 

I had a query regarding MG - MGC behavior in H.248

 

Scenario is as follows:

 

1.       MG  is registered with only one  MGC (say MGC1) and MGC1 is in
redundant mode (i.e. it has a  standby MGC2  )

2.       MG initiate Service change request "901" towards MGC1  and MGC1 in
reply sends handoff to MG with MGCIdToTry = MGC2 .

3.       MG is now trying to register with MGC2  with message "903".

4.       MGC2  ack the service change request from MG and after that there
is no message exchange between MG and  MGC2 and in the mean time  ITO
expired.

5.       Therefore MG now tries to register again with  MGC1 with service
change request  "909 MGC Impending Failure"

6.       MGC doesn't respond to this serviceChange request. MG performs
several retry for this above service change request in step 5. 

7.       To this MGC1 sends  error =506 { "Number of TransactionPendings
Exceeded" } 

8.       Now what should MG do in response to this error ?

9.       Should MG  again retry to register itself with standby MGC2
considering its a failed registration attempt ?

Or

        In response of this error=506 ,  it should go to Out of service
state considering it as failure in response of service change request?

 

 

Any help on this is really appreciated.

 

Thanks in advance.

 

 

Regards

Sushil

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