Siemens CP 1515 7DEOH $OWHUQDWLYH6FKHPHV

$GYDQFHG6HFXULW\0DLQWHQDQFH
Industrial Ethernet Wireless LAN RLM Manager, CP 1515 Manager
C79000-G8976-C171-01 189
7DEOH $OWHUQDWLYH6FKHPHV
Table 6Alternative Schemes gives a scheme where at each period two keys
are in use; at the end of each period, the oldest key is no longer valid and
needs to be replaced at all stations. Advantage of this scheme versus the
scheme in Table 5Single Key - Transition Period is that it requires less
frequent configuration changes at all Radio Link Modules.
Period AP Configuration Out-
ward
STA
Configuration(s)
In-ward
# Description Keys 1-2-3-4 Tx Key Keys 1-2-3-4 Tx Key
0 Main life key A A-0-0-0 1 A A-B-C-D 1 A
1 Main life A+B A-B-0-0 2 B = 1|2 A | B
2 Main life B+C 0-B-C-0 3 C = 2|3 B | C
3 Main life C+D 0-0-C-D 4 D = 3|4 C | D
4 Main life D+E E-0-0-D 1 E A-B-C-D
E-F-G-H
4
1
D
E
5 Main life E+F E-F-0-0 2 F E-F-G-H 1|2 E | F