Understanding "show module status reachability" command output when using CPM redundancyN/A
This article explains CPM redundancy and internal communication paths: data and control planes.
The data plane is used for NPM communication with APM and CPM.
CPMs use the control plane to communicate with NPMs and APMs.
There is no data plane communication between CPMs, only control plane.
Furthermore, the data plane should only be UP on primary CPM as the database is not running on secondary CPM.
X80# show module status reachability NA = Not Available, DP = Data Plane, CP = Control Plane cp = Control Processor, ap = Application Processor, np = Network Processor
Slot 13: Reachablity from np1 via CP ap4 ap5 ap6 ap7 ap10 cp1 cp2 Reachablity from np1 via DP ap4 ap5 ap6 ap7 ap10 cp1 Reachablity from np2 via CP none Reachablity from np2 via DP none Reachablity from ap4 via CP np1 ap5 ap6 ap7 ap10 cp1 cp2 Reachablity from ap4 via DP np1 ap5 ap6 ap7 ap10 cp1 Reachablity from ap5 via CP np1 ap4 ap6 ap7 ap10 cp1 cp2 Reachablity from ap5 via DP np1 ap4 ap6 ap7 ap10 cp1 Reachablity from ap6 via CP np1 ap4 ap5 ap7 ap10 cp1 cp2 Reachablity from ap6 via DP np1 ap4 ap5 ap7 ap10 cp1 Reachablity from ap7 via CP np1 ap4 ap5 ap6 ap10 cp1 cp2 Reachablity from ap7 via DP np1 ap4 ap5 ap6 ap10 cp1 Reachablity from ap10 via CP np1 ap4 ap5 ap6 ap7 cp1 cp2 Reachablity from ap10 via DP np1 ap4 ap5 ap6 ap7 cp1 Reachablity from cp1 via CP np1 ap4 ap5 ap6 ap7 ap10 cp2 Reachablity from cp1 via DP np1 ap4 ap5 ap6 ap7 ap10 Reachablity from cp2 via CP np1 ap4 ap5 ap6 ap7 ap10 cp1 Reachablity from cp2 via DP none
CP1 has full connectivity over the Control Plane, but not with the Data Plane:
Slot 13: Board Type CP8600 Board Part Number 004313 Board Serial Number L811C003 <output removed> cp1a Link Up cp1b Link Up cp1c Link Down cp1d Link Down
Slot 14: Board Type CP8600 Board Part Number 004313 Board Serial Number L810C054 <output removed> cp2a Link Down cp2b Link Down cp2c Link Down cp2d Link Down
This is normal behavior because CP2 is in Standby and doesn't have DP (Data Plane) connectivity, but only CP (Control
------------------------ show chassis ------------------------ Chassis Status for X80:
Chassis Part Number: 004360 Chassis Serial Number: G806F006 Chassis Revision: C2 Chassis OCODE: A000 Slot Present Module Name Module Type Status <output removed> 13 Yes cp1 CP8600 Up 14 Yes cp2 CP8600 Standby
Imported Document ID: 000019886
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