Distributed Link Service Does Not Reactivate Dropped Connection

MORE INFORMATION

In the update to SNA Server 2.11 SP1, a new registry value has been added to cope with Leased Links, which do not make use of the retry parameters. The new registry value specifies the delay in seconds (with a granularity of five-second intervals), before the outage message is generated. The default setting is 20 seconds.

The registry value is:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Sevices\ 
   <link_service>\Parameters\ExtraParameters\RetryPeriod (REG_DWORD).
				

With regard to the symptom, here is an example of what you may see with the SNA Server Data Link Control message trace enabled:

|000000a1.000000a7 DLC    ----------------------------------------------
10:45:15.54
|000000a1.000000a7 DLC    08160000->01020300 OPEN  LINK RSP ERROR
|000000a1.000000a7 DLC                       Err:0D0A
|000000a1.000000a7 DLC
|000000a1.000000a7 DLC    ---- Header  at address 00CC44B4, 2 elements ----
|000000a1.000000a7 DLC    03102700 00890D0A 010004DC 0100A400
<..'..i........u.>
|000000a1.000000a7 DLC
|000000a1.000000a7 DLC    ---- Element at address 011BD910, start 1, end 92
----
|000000a1.000000a7 DLC    53444C43 31202020 2020534E 41534552     <SDLC1
SNASER>
|000000a1.000000a7 DLC    56522020 00010101 01C1FF01 7530000A     <VR
.....A..u0..>
|000000a1.000000a7 DLC    03E80003 03E8FFFF 03E8FFFF 03E8001E
<.Y...Y...Y...Y..>
|000000a1.000000a7 DLC    7530000A 03E8003C 03E8000F 03E8012C
<u0...Y.<.Y...Y.,>
|000000a1.000000a7 DLC    00004402 00000000 00000000 00000000
<..D.............>
|000000a1.000000a7 DLC    00000000 00000000 00000000
<............    >
|000000a1.000000a7 DLC
|000000a1.000000a7 DLC    ---- Element at address 011BA5BC, start 1, end 1
----
|000000a1.000000a7 DLC    03                                      <.
>

In the Application Event Log, this problem is logged as an Information
event with Message ID 77 and is decoded as follows:

   Connection <connection name>   failed to activate due to failure at link
   service.

   Error Code = 0D0A

   EXPLANATION
   The node failed to activate a link service to establish the specified
   connection.

The reason for the failure is given by the error code, as follows:

   X'0001' - Hardware initialization failure

   X'0008' - Invalid XID length specified

   X'000A' - Fatal LCC hardware error

   X'000B' - Invalid link index

   X'000C' - Open(Link) has insufficient data

   X'000D' - Link connection timeout

   X'000E' - Maximum connection count reached or internal resources
             exhausted

   X'0011' - Close(Link) received while Open(Link) pending

   X'0012' - Duplicate request

   X'0A11' - X.25 PVC already in use

   X'0AFF' - Duplicate destination MAC/SAP for link service

   X'0D01' - Insufficient memory to locate link service

   X'0D02' - Invalid SNA Server Domain

   X'0D04' - Link Service not found

   X'0D07' - Link Service not found

   X'0D0A' - Unable to open pipe to link service

   X'0D0B' - No room in service table for link service

   X'0D0C' - Remote Server not found or inactive

   X'0D0D' - Link Service not active at remote Server

   X'0D0E' - Link service not available to Distributed Link Service

   X'0D0A' - Unable to open pipe to link service