I have installed a PowerConnect 7048 as a "collector" switch, meaning it has 8 switches connected that it uplinks to the core. The uplink port is a 10 MB fiber port. Topology changes seem to be causing the ports carrying switches to vie for root status, sending the correct root into blocking status momentarily.
Example of non-root port:
Port Gi1/0/37 Enabled
State: Forwarding Role: Designated
Port id: 128.37 Port Cost: 20000
Root Protection: No
Designated bridge Priority: 32768 Address: 5C26.0AAD.1361
Designated port id: 128.37 Designated path cost: 2000
CST Regional Root: 80:00:5C:26:0A:AD:13:61 CST Port Cost: 0
BPDU: sent 433066, received 161
Root
Port Te1/2/1 Enabled
State: Forwarding Role: Root
Port id: 128.55 Port Cost: 2000
Root Protection: No
Designated bridge Priority: 32768 Address: 5C26.0AAA.1EA6
Designated port id: 128.112 Designated path cost: 0
CST Regional Root: 00:00:5C:26:0A:AA:1E:A6 CST Port Cost: 0
BPDU: sent 1460, received 673417
Uplink port to Te1/2/1 on core (root bridge)
Port Te2/2/2 Enabled
State: Forwarding Role: Designated
Port id: 128.112 Port Cost: 2000
Port Fast: No Root Protection: No
Designated bridge Priority: 0 Address: 5C26.0AAA.1EA6
Designated port id: 128.112 Designated path cost: 0
CST Regional Root: 00:00:5C:26:0A:AA:1E:A6 CST Port Cost: 0
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
Auto Portfast.................................. TRUE
I wanted to change the Designated Bridge Priority on Te1/2/1 of the collector switch to 8192 but there is not a command I find for that. What is my best option for correcting this issue?
Thank you.