Look, I understand you need as much as possible to help me out but I'm reluctant to post the show run from a production core switch. Below is however the log on the core switch a few minutes after I've connected the switch, doesn't matter if it's a Cisco switch or an HP. Also I've included show spanning-tree and bpdu-protection
I 12/28/12 15:56:00 ports: port 16 is now off-line
I 12/28/12 15:56:03 ports: port 16 is Blocked by STP
I 12/28/12 15:56:04 ports: port 16 is now off-line
I 12/28/12 15:56:07 ports: port 16 is Blocked by STP
I 12/28/12 15:56:08 ports: port 16 is now off-line
I 12/28/12 15:56:11 ports: port 16 is Blocked by STP
I 12/28/12 15:56:12 ports: port 16 is now off-line
I 12/28/12 15:56:18 ports: port 16 is Blocked by STP
I 12/28/12 15:56:19 ports: port 16 is now off-line
I 12/28/12 15:56:22 ports: port 16 is Blocked by STP
I 12/28/12 15:56:24 ports: port 16 is now off-line
I 12/28/12 15:56:27 ports: port 16 is Blocked by STP
I 12/28/12 15:56:27 ports: port 16 is now off-line
I 12/28/12 15:56:30 ports: port 16 is Blocked by STP
I 12/28/12 15:56:31 ports: port 16 is now off-line
I 12/28/12 15:56:34 ports: port 16 is Blocked by STP
I 12/28/12 15:56:35 ports: port 16 is now off-line
I 12/28/12 15:56:37 ports: port 16 is Blocked by STP
I 12/28/12 15:56:38 ports: port 16 is now off-line
I 12/28/12 15:56:45 ports: port 16 is Blocked by STP
I 12/28/12 15:56:45 ports: port 16 is now off-line
I 12/28/12 15:56:48 ports: port 16 is Blocked by STP
I 12/28/12 15:56:49 ports: port 16 is now off-line
I 12/28/12 15:57:00 ports: port 16 is Blocked by STP
I 12/28/12 15:57:01 ports: port 16 is now off-line
I 12/28/12 15:57:04 ports: port 16 is Blocked by STP
I 12/28/12 15:57:05 ports: port 16 is now off-line
I 12/28/12 15:57:11 ports: port 16 is Blocked by STP
I 12/28/12 15:57:12 ports: port 16 is now off-line
I 12/28/12 15:57:15 ports: port 16 is Blocked by STP
I 12/28/12 15:57:16 ports: port 16 is now off-line
I 12/28/12 15:57:19 ports: port 16 is Blocked by STP
I 12/28/12 15:57:20 ports: port 16 is now off-line
Multiple Spanning Tree (MST) Information
STP Enabled : Yes
Force Version : RSTP-operation
IST Mapped VLANs : 1-4094
Switch MAC Address : 0021f7-9d6400
Switch Priority : 4096
Max Age : 20
Max Hops : 20
Forward Delay : 15
Topology Change Count : 2209
Time Since Last Change : 5 days
CST Root MAC Address : 0021f7-9d6400
CST Root Priority : 4096
CST Root Path Cost : 0
CST Root Port : This switch is root
IST Regional Root MAC Address : 0021f7-9d6400
IST Regional Root Priority : 4096
IST Regional Root Path Cost : 0
IST Remaining Hops : 20
Root Guard Ports :
TCN Guard Ports :
Protected Ports :
Filtered Ports :
| Prio | Designated Hello
Port Type | Cost rity State | Bridge Time PtP Edge
----- --------- + --------- ----- ---------- + ------------- ----- --- ----
1 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
2 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
3 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
4 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
5 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
6 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
7 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes No
8 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
9 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
10 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
11 100/1000T | 2000000 128 Forwarding | 0021f7-9d6400 2 Yes No
12 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
13 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes No
14 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
15 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
16 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
17 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
18 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes No
19 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes No
20 100/1000T | Auto 128 Disabled |
21 100/1000T | Auto 128 Disabled |
22 100/1000T | Auto 128 Disabled |
23 100/1000T | Auto 128 Disabled |
24 100/1000T | Auto 128 Disabled |
25 100/1000T | Auto 128 Disabled |
26 100/1000T | Auto 128 Disabled |
27 100/1000T | Auto 128 Disabled |
28 100/1000T | Auto 128 Disabled |
29 100/1000T | Auto 128 Disabled |
30 100/1000T | Auto 128 Disabled |
31 100/1000T | Auto 128 Disabled |
32 100/1000T | Auto 128 Disabled |
33 100/1000T | Auto 128 Disabled |
34 100/1000T | Auto 128 Disabled |
35 100/1000T | Auto 128 Disabled |
36 100/1000T | Auto 128 Disabled |
37 100/1000T | Auto 128 Disabled |
38 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
39 100/1000T | 200000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
40 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
41 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
42 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
43 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes Yes
44 100/1000T | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
45 1000LX | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
46 100/1000T | Auto 128 Disabled |
47 1000LX | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
48 1000LX | 20000 128 Forwarding | 0021f7-9d6400 2 Yes No
Status and Counters - STP Port(s) BPDU Protection Information
BPDU Protection Timeout (sec) : 0
Protected Ports :