Interface Configuration
7750 SR OS Interface Configuration Guide Page 81
APS Switchover Impact on Statistics
All SAP-level statistics are retained with an APS switch. A SAP will reflect the data received
regardless of the number of APS switches that has occurred. ATM statistics, however, are cleared
after an APS switch. Thus, any ATM statistics viewed on an APS port are only the statistics since
the current active member port became active.
Physical layer packet statistics on the APS group reflect what is currently on the active member
port.
Port and path-level statistics follow the same behaviour as described above.
Any SONET physical-layer statistics (for example, B1,B2,B3,...) on the APS port are only what is
current on the active APS member port.
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