Global APPN topology data vector (X'000100060001')

The format of the global APPN topology data vector is shown in Table 1. One global APPN topology data vector is built per request Global APPN Topology data.

Table 1. Global APPN topology data vector
Byte	Type	Description
8–11	binary rolling counter	Number of routes calculated using an existing tree
12–15	binary rolling counter	Number of routes calculated using a modified tree
16–19	binary rolling counter	Number of routes calculated using a new tree
20–23	binary rolling counter	Number of topology database updates (TDUs) originated by this node
24–27	binary rolling counter	Number of topology database updates (TDUs) propagated by this node
28–31	binary rolling counter	Number of TDUs received by this node resulting in a topology database update
32–35	binary rolling counter	Number of TDUs received by this node and discarded for normal reasons. Resource sequence number (RSN) is valid, but data already seen.
36–39	binary rolling counter	Number of TDUs received by this node and discarded because the RSN is not valid. (TDU is rebroadcast.)
40–43	binary rolling counter	Number of TDUs received by this node and discarded because of data inconsistency. (TDU is rebroadcast.)
44–47	binary	Number of network nodes in the topology database
48–51	binary	Number of end nodes in the topology database
52–55	binary	Number of unidirectional TGs in the topology database
56–59	binary rolling counter	Number of TG failures at this node
60–63	binary rolling counter	Number of dynamic PU allocations
64–67	binary rolling counter	Number of times a routing tree was discarded due to the tree cache being full
68–71	binary	Current number of trees in the tree cache
72–75	binary	Number of virtual nodes in the topology database
76–79	binary	Number of central directory server nodes in the topology database
80–83	binary	Number of interchange nodes in the topology database
84–87	binary	Number of end nodes connected to this node
88–91	binary	Number of network nodes connected to this node
92–95	binary	Number of virtual nodes connected to this node