z/OS Communications Server: SNA Network Implementation Guide
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APPN interchange node or network node

z/OS Communications Server: SNA Network Implementation Guide
SC27-3672-01

For APPN interchange node (ICN) or network node (NN) configurations, use the following worksheet:

Table 1. Worksheet for APPN interchange node or network node storage
Step Description Formulas (decimal) Common Private DISPLAY STATS ID
1 Number of 4KB pages allocated for the SNA internal trace table (trace tab + 4) * 4096 = ________   2
2 Determine the size of the IOBUF parameter. This value is defined in the SNA start list. These buffers hold data transmitted to and from SNA. Used in questions 4 & 12     3
3 Number of channel-attached communication controllers (NCPs) activated and owned by this SNA.

COMMON STORAGE:
(NCPs * 1200)

 
=  ________

  5
4 Sum value of MAXBFRU parameters for all channel-attached communications controllers activated by this SNA. MAXBFRU is defined in the HOST definition statement of the NCP channel-attached major node definition.

COMMON STORAGE:
((IOBUF size + 98) *
2 * maxbfru NCPs)

 
 
=  ________

  3 & 6
5 Number of PUs defined in this SNA. Include all PUs defined to SNA in PU definition statements, and controllers defined in CLUSTER definition statements. Include locally attached, remotely attached, dynamically added, switched, ICA and NCP (including NTRI) PUs.

PRIVATE STORAGE:
(defined PUs * 1000)

 

 
=  ________

48 & 67
6 Number of device type LUs defined in this SNA. Include the locally attached LUs, and LUs attached through an NCP. In addition, include LUs that are defined to SNA in LU definition statements, and those devices defined in TERMINAL statements. Do not include applications.

PRIVATE STORAGE:
(defined LUs * 820)

 

 
=  ________

50
7 Number of independent LUs defined locally, remotely or by way of CDRSC. Include all independent LUs for which SNA provides boundary function services, and all NTRI independent LUs.

COMMON STORAGE:
(indep LUs  * 270)
PRIVATE STORAGE:
(indep LUs  * 400)

 
=  ________

 
 
 
=  ________

80
8 Number of LU 6.2 sessions with application LUs owned by this SNA. LU 6.2 sessions are valid only for applications where APPC=YES is specified in the APPL major node definition. Include all same domain, cross domain, and cross network LU 6.2 sessions.

COMMON STORAGE:
(LU6.2 ses * 840)

 
=  ________

  58
9 Number of device type LUs owned by this SNA, and in session with an application program owned by this SNA.

COMMON STORAGE:
(LUs w/appls * 500)
PRIVATE STORAGE:
(LUs w/appls * 420)

 
=  ________

 
 
 
=  ________

71
10 Number of device type LUs owned by this SNA, and in session with an application program owned by another SNA.

PRIVATE STORAGE:
(cross node LU ses * 420)

 

 
=  ________

73
11 Number of LU 6.2 sessions with both LUs owned by this SNA.

PRIVATE STORAGE:
(LU6.2 ses * 450)

 

 
=  ________

77
12 Number of device type (nonapplication) LUs in session with a TSO application.

COMMON STORAGE:
(TSO LUs) * (2300
+ IOBUF size)

 
 
=  ________

  55 & 3
13 Number of ENs that establish CP-CP sessions with this SNA.

PRIVATE STORAGE:
(adj end node * 3170)
COMMON STORAGE:
(adj end node * 920)

 
 
 
= ________

 
= ________

104
14 Number of transmission groups used between this node and attached, or served, end nodes.

PRIVATE STORAGE:
(end node TGs * 690)

 

 
=  ________

142
15 Number of transmission groups used between this node and other network nodes.

PRIVATE STORAGE:
(network node TGs * 690)

 

 
=  ________

143
16 If the SNA topology agent is being used, enter the number of resources being monitored.

PRIVATE STORAGE:
(num res  * 3500)

 

 
=  ________

N/A
   

Total Common = ________
                 1024

= ________KB (totcom)  
   

Total Private = ________
               1024

 

= ________KB (totpri)
 
 

Table 2. Summary of worksheet, APPN interchange node or network node storage
ICN/NN configuration description Common Private
Calculated COMMON storage for ICN/NN configuration above = ________KB (totcom)  
  DYNAMIC COMMON STORAGE ( 4 x totcom) = ________KB  
  SNA TOPOLOGY AGENT STORAGE (if used) + 2000KB  
  SNA SYSPLEX STORAGE (if used) +100KB  
  SNA BASE STORAGE (COMMON) + 3002KB  
  TOTAL SNA COMMON STORAGE = ________KB  
Calculated PRIVATE storage for ICN/NN configuration above   = ________KB (totpri)
  DYNAMIC PRIVATE STORAGE ( 2 x totpri)   = ________KB
  SNA SYSPLEX STORAGE (if used) +750KB  
  SNA BASE STORAGE (PRIVATE)   + 7057KB
  TOTAL SNA PRIVATE STORAGE  

= ________KB
 
 

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