System information

SIGNAMAX a.s.
Seat: Palackeho trida 38, 612 00 Brno, CZ l Office: Vlarska 22, P. O. Box 214, 658 14 Brno, CZ
T:[phone] l F:[phone] l www.signamax.eu
17
9
Spanning tree priority value of the CIST root bridge
CIST ROOT MAC:
Mac Address of the CIST root bridge
CIST EXTERNAL ROOT PATH COST:
Root path cost value from the point of view of the bridge’s MST region.
CIST ROOT PORT ID:
The port ID of the bridge’s root port. In MSTP, peer port of a root port may reside
in defferent MST region or in the same MST region.The first case indicates that the
root port’s owner is the CIST regional root bridge.
CIST REGIONAL ROOT PRIORITY:
Spanning tree priority value of the CIST regional root bridge.Note that CIST
Regional Root bridge is different from CIST Root bridge.One exception is that
when a bridge belonging to an MST region happens to be the root bridge of the
CST(Common Spanning Tree). An MST Region in the CST can be regarded as a
common RSTP bridge.The IST(Internal Spanning Tree) and MSTIs are transparent
to bridges outside this region.
CIST REGIONAL ROOT MAC:
Mac Address of the CIST regional root bridge.
CIST INTERNAL ROOT PATH COST:
Root path cost value from the point of view of the bridges inside the IST.
CIST CURRENT MAX AGE:
Max Age of the CIST Root bridge.
CIST CURRENT FORWARD DELAY:
Forward Delay of the CIST Root bridge.
TIME SINCE LAST TOPOLOGY CHANGE(SECs):
Time Since Last Topology Change is the elapsed time in unit of seconds for a
bunch of “Topology Change and(or) Topology Change Notification receiving” to
occur. When new series of Topology Changes occur again, this counter will be
reset to 0.
TOPOLOGY CHANGE COUNT(SECs):
The per spanning tree instanceTopology Change Count expresses the time spent
in unit of seconds since the beginning of the Spanning Tree Topology Change to
the end of the STP convergence. Once there is no topology change occurring and
no more topology change notification received, the Topology Change count will be
reset to 0.