Phobos1821
MIS
I have 7 switches on my network. All of them are configured for STP. Our main layer 2/3 distribution switch is set for root. A second high end distribution switch is set for secondary root. The rest are set in uplink fast. 5 of the 7 switches in my network are currently participating in spanning-tree. Here is the output from a non-root switch.
----------------
VLAN1
Spanning tree enabled protocol IEEE
ROOT ID Priority 20481
Address 000e.38f4.f480
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49152
Address 0007.5093.b580
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Port Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
------- ------- ---- ---- --- ---- -------------- -------
Fa0/1 128.13 128 3019 FWD 3019 0007.5093.b580 128.13
...
...
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Two of the switches on my network currently are setting themselves as the root bridge for the network. Here is the output of that switch.
----------------
VLAN1
Spanning tree enabled protocol IEEE
ROOT ID Priority 49152
Address 00d0.06fd.ab80
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49152
Address 00d0.06fd.ab80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Port Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
------- ------- ---- ---- --- ---- -------------- -------
Fa0/1 128.13 128 3019 FWD 0 00d0.06fd.ab80 128.13
...
-----------------------
all ports on the switch do not have portfast enabled. They are all a member of the same Vlan [Vlan1]. But when I do an output of the spanning-tree on the vlan, the uplink port on the switch is missing. It's just not there. Here's the output of "sho spanning-tree vlan 1"
--------
Interface Fa0/22 (port 36) in Spanning tree 1 is FORWARDING
Port path cost 3019, Port priority 128
Designated root has priority 49152, address 00d0.06fd.ab80
Designated bridge has priority 49152, address 00d0.06fd.ab80
Designated port is 36, path cost 0
Timers: message age 0, forward delay 0, hold 0
BPDU: sent 508584, received 0
Interface Fa0/24 (port 38) in Spanning tree 1 is down
Port path cost 3019, Port priority 128
Designated root has priority 49152, address 00d0.06fd.ab80
Designated bridge has priority 49152, address 00d0.06fd.ab80
Designated port is 38, path cost 0
Timers: message age 0, forward delay 0, hold 0
BPDU: sent 5, received 26
------------
It just skipped over port 23 (The uplink port). What is going on here? It's part of VLAN1 and should participate in STP. Any thoughts?
----------------
VLAN1
Spanning tree enabled protocol IEEE
ROOT ID Priority 20481
Address 000e.38f4.f480
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49152
Address 0007.5093.b580
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Port Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
------- ------- ---- ---- --- ---- -------------- -------
Fa0/1 128.13 128 3019 FWD 3019 0007.5093.b580 128.13
...
...
----------------
Two of the switches on my network currently are setting themselves as the root bridge for the network. Here is the output of that switch.
----------------
VLAN1
Spanning tree enabled protocol IEEE
ROOT ID Priority 49152
Address 00d0.06fd.ab80
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 49152
Address 00d0.06fd.ab80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Port Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
------- ------- ---- ---- --- ---- -------------- -------
Fa0/1 128.13 128 3019 FWD 0 00d0.06fd.ab80 128.13
...
-----------------------
all ports on the switch do not have portfast enabled. They are all a member of the same Vlan [Vlan1]. But when I do an output of the spanning-tree on the vlan, the uplink port on the switch is missing. It's just not there. Here's the output of "sho spanning-tree vlan 1"
--------
Interface Fa0/22 (port 36) in Spanning tree 1 is FORWARDING
Port path cost 3019, Port priority 128
Designated root has priority 49152, address 00d0.06fd.ab80
Designated bridge has priority 49152, address 00d0.06fd.ab80
Designated port is 36, path cost 0
Timers: message age 0, forward delay 0, hold 0
BPDU: sent 508584, received 0
Interface Fa0/24 (port 38) in Spanning tree 1 is down
Port path cost 3019, Port priority 128
Designated root has priority 49152, address 00d0.06fd.ab80
Designated bridge has priority 49152, address 00d0.06fd.ab80
Designated port is 38, path cost 0
Timers: message age 0, forward delay 0, hold 0
BPDU: sent 5, received 26
------------
It just skipped over port 23 (The uplink port). What is going on here? It's part of VLAN1 and should participate in STP. Any thoughts?