Procurve 2520-8-PoE Spanning Tree, ports stays in blocking

[Nic_Hooper]

I have a a network of around 50 switches, a mixture of Linksys and replaching with HP Procuve. Over the past 4 weeks and have had edge switches (not in a loop), drop off becuase the switch befores port has gone in Blocking, and the swich at the end of the chain that has dropped off needs to be rebooted. Just wondered of anyone has an ieda of why thos would be. If I disable and enable the port of the switch it stays in blocking. (Sh Spanning tree attached, see port 10 blocking)

Multiple Spanning Tree (MST) Information

 STP Enabled   : Yes
 Force Version : MSTP-operation
 IST Mapped VLANs : 1-4094
 Switch MAC Address : 101f74-9b61a0
 Switch Priority    : 32768
 Max Age  : 20
 Max Hops : 20
 Forward Delay : 15

 Topology Change Count  : 18
 Time Since Last Change : 11 hours

 CST Root MAC Address : 0014bf-5ff5da
 CST Root Priority    : 32768
 CST Root Path Cost   : 180000
 CST Root Port        : 9

 IST Regional Root MAC Address : 101f74-9b61a0
 IST Regional Root Priority    : 32768
 IST Regional Root Path Cost   : 0
 IST Remaining Hops            : 20

 Root Guard Ports     :
 TCN Guard Ports      :
 BPDU Protected Ports :
 BPDU Filtered Ports  :

                 |           Prio             | Designated    Hello
 Port  Type      | Cost      rity  State      | Bridge        Time  PtP Edge
 ----- --------- + --------- ----- ---------- + ------------- ----- --- ----
 1     10/100TX  | Auto      128   Disabled   |
 2     10/100TX  | 200000    128   Forwarding | 101f74-9b61a0 2     Yes Yes
 3     10/100TX  | 200000    128   Forwarding | 101f74-9b61a0 2     Yes Yes
 4     10/100TX  | Auto      128   Disabled   |
 5     10/100TX  | 200000    128   Forwarding | 101f74-9b61a0 2     Yes Yes
 6     10/100TX  | Auto      128   Disabled   |
 7     10/100TX  | Auto      128   Disabled   |
 8     10/100TX  | Auto      128   Disabled   |
 9     1000SX    | 20000     128   Forwarding | 101f74-9ba000 2     Yes No
 10    1000SX    | 20000     128   Blocking   | 101f74-9b61a0 2     Yes No

[Fredrik Lönnman]

Something is looped.. ;)

Also, wrong forum section. This is not a A-series product.

[Nic_Hooper]

Sorry will repost on the correct forum. FYI This is the second switch before the end of the run, there is no loop. This is why I am a little confused about why the port goes in blocking, a reboot of the last switch will put the port into forwardig and then randomly it will go back to blocking??

[Nic_Hooper]

Reposted

http://h30499.www3.hp.com/t5/E-Series/2520-8-PoE-Spanning-Tree-Problem/td-p/5570975