Flapping port on a two port LAG connecting a single PowerConnect 6248 to a stacked PowerConnect 6248

I am moving from a single core switch PowerConnect 6248 to a stacked core switch of 2 PowerConnect 6248s. In the interim, I would like to connect both the soon to be retired core switch (sw038) AND the stacked core switch (sw040) to each other via a 2 port LAG. That way I can take the edge switches that are LAGed to the single core switch and move them gradually to the stacked core switch.

The dynamic LAG I have established between the two switches is up as reported by both the single core (sw038, LAG15 on g9,10) and the stacked core switch (sw040, LAG48 on unit 1,g2 and unit 2,g2). I have later on tested the LAG and traffic flows through.

The problem I have is in the stacked core's LAG: one port of the LAG (unit 1, g2) keeps flapping, being connected and disconnected. On the single core, the corresponding connection, g9 remains dark. Swapping cables has not worked.

All switches are running 3.3.7.2. I have factory wiped the stacked core switch (sw040) and reconfigured the switches from scratch (with just the bare minimum so no vlans are setup yet). This problem existed prior to the wipe. The single core switch (sw038) already has two LAGs (lag 1 and lag 8) that work without flapping ports. This core switch also acts as a router on the network.

I have gone through the steps of STP Troubleshooting Best Practices at http://en.community.dell.com/support-forums/network-switches/f/866/t/19465205

CPU resources and memory resources are the same across core and stacked switch (4.6 to 5.5% at 5sec interval and ~23000 KBytes available memory)

How can I stop unit 1,g2 of the stacked core (sw040) from flapping?

As you can see, in the below copious amounts of data, when I run show spanning-tree blockedports on the stacked core, I get 1/g2 listed and then when the command is rerun a few seconds later, the 1/g2 disappears, as it flaps off and on.

BTW: I added two more ports to the LAG later on, and those ports are not flapping. Just unit 1,g2.

Thank you.

The single core switch reports:
--------------------------------

<181> OCT 27 17:47:29 192.168.2.2-1 TRAPMGR[152690576]: traputil.c(611) 5626 %% Link Up: 1/0/10

<181> OCT 27 17:47:29 192.168.2.2-1 TRAPMGR[152690576]: traputil.c(611) 5627 %% 1/0/10 is transitioned from the Forwarding state to the Blocking state in instance 0

<181> OCT 27 17:47:31 192.168.2.2-1 TRAPMGR[152690576]: traputil.c(611) 5628 %% 1/0/10 is transitioned from the Learning state to the Forwarding state in instance 0

<181> OCT 27 17:47:31 192.168.2.2-1 TRAPMGR[125672080]: traputil.c(611) 5629 %% Spanning Tree Topology Change: 0, Unit: 1

<181> OCT 27 17:47:33 192.168.2.2-1 TRAPMGR[152690576]: traputil.c(611) 5630 %% 1/0/10 is transitioned from the Forwarding state to the Blocking state in instance 0

<181> OCT 27 17:47:33 192.168.2.2-1 TRAPMGR[152690576]: traputil.c(611) 5631 %% 0/3/15 is transitioned from the Forwarding state to the Blocking state in instance 0

<181> OCT 27 17:47:35 192.168.2.2-1 TRAPMGR[152690576]: traputil.c(611) 5632 %% 0/3/15 is transitioned from the Learning state to the Forwarding state in instance 0

<181> OCT 27 17:47:35 192.168.2.2-1 TRAPMGR[125672080]: traputil.c(611) 5633 %% Spanning Tree Topology Change: 0, Unit: 1

The stacked core switch endlessly reports (logging set to debug to console):
------------------------------------------------------------------------------

<189> OCT 27 17:47:24 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 722 %% Link Up: 1/0/2

<189> OCT 27 17:47:24 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 723 %% 1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0

<189> OCT 27 17:47:25 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 724 %% Link Down: 1/0/2

<189> OCT 27 17:47:25 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 725 %% Link on 1/0/2 is failed

<189> OCT 27 17:47:25 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 726 %% 1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0

<189> OCT 27 17:47:28 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 727 %% Link Up: 1/0/2

<189> OCT 27 17:47:28 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 728 %% 1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0

<189> OCT 27 17:47:29 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 729 %% Link Down: 1/0/2

<189> OCT 27 17:47:29 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 730 %% Link on 1/0/2 is failed

<189> OCT 27 17:47:29 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 731 %% 1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0

<189> OCT 27 17:47:31 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 732 %% Link Up: 1/0/2

<189> OCT 27 17:47:31 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 733 %% 1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0

<189> OCT 27 17:47:32 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 734 %% Link Down: 1/0/2

<189> OCT 27 17:47:32 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 735 %% Link on 1/0/2 is failed

<189> OCT 27 17:47:32 192.168.2.1-1 TRAPMGR[152737744]: traputil.c(611) 736 %% 1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0

==================================================
Core (sw038):
==================================================

sw038#show lacp port-channel 15

Actor:
system priority: 1
system mac addr: 001E.4F02.1935
Partner:
system priority: 1
system mac addr: 001E.4F0F.3F33


sw038#show interfaces detail ethernet 1/g9

Port Type Duplex Speed Neg Admin Link
State State
----- ------------------------------ ------ ------- ---- ----- -----
1/g9 Gigabit - Level N/A Unknown Auto Up Down

Port Description
---- --------------------------------------------------------------------------
1/g9

Flow Control:Enabled
Port: 1/g9
VLAN Membership mode:Access Mode

Operating parameters:
PVID: 10
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged
Default Priority: 0
GVRP status:Disabled
Protected:Disabled

Port 1/g9 is member in:

VLAN Name Egress rule Type
---- --------------------------------- ----------- --------
10 Internal Net Untagged Static

Static configuration:
PVID: 10
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged

Port 1/g9 is statically configured to:

VLAN Name Egress rule
---- --------------------------------- -----------
10 Internal Net Untagged

Forbidden VLANS:
VLAN Name
---- ---------------------------------

Port 1/g9 Enabled
State: Disabled Role: Disabled
Port id: 128.9 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 80:00:00:1E:4F:02:19:33
Designated port id: 128.9 Designated path cost: 0
CST Regional Root: 80:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 203672, received 29

sw038#show interfaces detail ethernet 1/g10

Port Type Duplex Speed Neg Admin Link
State State
----- ------------------------------ ------ ------- ---- ----- -----
1/g10 Gigabit - Level Full 1000 Auto Up Up

Port Description
---- --------------------------------------------------------------------------
1/g10

Flow Control:Enabled

Excerpt from show tech-support command on core:

Admin Physical Physical Link Link LACP
Intf Type Mode Mode Status Status Trap Mode
------ ------ ------- ---------- ---------- ------ ------- -------

1/g9 PC Mbr Enable Auto Down Enable Enable
1/g10 PC Mbr Enable Auto 1000 Full Up Enable Enable
ch15 Enable Up Disable Disable
vlan 10 Enable 10 Half 10 Half Up Enable Enable

***************** Show Isdp Neighbors *****************

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge,
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Intf Holdtime Capability Platform Port ID
---------------------- ------- --------- ------------ -------------------- ----------------------

sw038#show spanning-tree summary

Spanning Tree Adminmode........... Enabled
Spanning Tree Version............. IEEE 802.1w
BPDU Guard Mode................... Enabled
BPDU Flood Mode................... Disabled

Portfast BPDU filtering :....... Disabled
Configuration Name................ 00-1E-4F-02-19-33
Configuration Revision Level...... 0
Configuration Digest Key.......... 0xac36177f50283cd4b83821d8ab26de62
Configuration Format Selector..... 0

sw038#show spanning-tree port-channel 15

Port ch15 Enabled
State: Forwarding Role: Designated
Port id: 96.640 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 96.640 External path cost: 20000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
BPDU: sent 431876, received 19

sw038#show spanning-tree active
Spanning tree Enabled (BPDU flooding : Disabled) Portfast BPDU filtering Disabled mode rstp
CST Regional Root: 00:00:00:1E:4F:02:19:33
Regional Root Path Cost: 0

###### MST 0 Vlan Mapped: 1, 10, 230, 234, 236-239
ROOT ID
Address 00:1E:4F:02:19:33
This Switch is the Root.
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Interfaces

Name State Prio.Nbr Cost Sts Role PortFast RestrictedPort
------ -------- --------- ---------- ---- ----- -------- -------
1/g1 Enabled 128.1 20000 FWD Desg No No
1/g27 Enabled 128.27 20000 FWD Desg No No
ch1 Enabled 96.626 10000 FWD Desg No No
ch8 Enabled 96.633 10000 FWD Desg No No
ch15 Enabled 96.640 20000 FWD Desg No No

sw038#show spanning-tree detail active
Spanning tree Enabled (BPDU flooding : Disabled) Portfast BPDU filtering Disabled mode rstp
CST Regional Root: 00:00:00:1E:4F:02:19:33
Regional Root Path Cost: 0
ROOT ID
Address 00:1E:4F:02:19:33
This Switch is the Root.
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec

Number of topology changes 28 last change occurred 0d23h4m57s ago
Times: hold 6, hello 2, max age 20, forward delay 15

Port 1/g1 Enabled
State: Forwarding Role: Designated
Port id: 128.1 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.1 External path cost: 20000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 1073845, received 0

Port 1/g3 Enabled
State: Forwarding Role: Disabled
Port id: 128.3 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.3 External path cost: 0
CST Regional Root: 80:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 4, received 0

Port 1/g4 Enabled
State: Forwarding Role: Disabled
Port id: 128.4 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.4 External path cost: 0
CST Regional Root: 80:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 4, received 0

Port 1/g10 Enabled
State: Forwarding Role: Disabled
Port id: 128.10 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.10 External path cost: 0
CST Regional Root: 80:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 260932, received 18

Port 1/g27 Enabled
State: Forwarding Role: Designated
Port id: 128.27 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.27 External path cost: 20000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 3800416, received 2

Port 1/g33 Enabled
State: Forwarding Role: Disabled
Port id: 128.33 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.33 External path cost: 0
CST Regional Root: 80:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 4, received 0

Port 1/g34 Enabled
State: Forwarding Role: Disabled
Port id: 128.34 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 128.34 External path cost: 0
CST Regional Root: 80:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 4, received 0

Port ch1 Enabled
State: Forwarding Role: Designated
Port id: 96.626 Port Cost: 10000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 96.626 External path cost: 10000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 3800418, received 3

Port ch8 Enabled
State: Forwarding Role: Designated
Port id: 96.633 Port Cost: 10000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 96.633 External path cost: 10000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 3800418, received 3

Port ch15 Enabled
State: Forwarding Role: Designated
Port id: 96.640 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 0 Address: 00:1E:4F:02:19:33
Designated port id: 96.640 External path cost: 20000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 435270, received 19

sw038#show spanning-tree blockedports
Spanning tree Enabled (BPDU flooding : Disabled) mode rstp
CST Regional Root: 00:00:00:1E:4F:02:19:33
Regional Root Path Cost: 0

###### MST 0 Vlan Mapped: 1, 10, 230, 234, 236-239
ROOT ID
Address 00:1E:4F:02:19:33
This Switch is the Root.
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Interfaces

Name State Prio.Nbr Cost Sts Role PortFast RestrictedPort
------ -------- --------- ---------- ---- ----- -------- -------

sw038#show interfaces port-channel 15

Channel Ports Hash Algorithm Type
------- ----------------------------- -------------------
ch15 Active: 1/g10 3
Inactive: 1/g9

Hash Algorithm Type
1 - Source MAC, VLAN, EtherType, source module and port Id
2 - Destination MAC, VLAN, EtherType, source module and port Id
3 - Source IP and source TCP/UDP port
4 - Destination IP and destination TCP/UDP port
5 - Source/Destination MAC, VLAN, EtherType, source MODID/port
6 - Source/Destination IP and source/destination TCP/UDP port

sw038#debug spannng-tree bpdu

<183> OCT 28 17:23:08 192.168.2.2-1 DOT1S[125600896]: dot1s_debug.c(1451) 5918 %% Pkt TX - Intf:1/0/1(1), Source_Mac:00:1e:4f:02:19:35, Version:2, Root_Mac:00:1e:4f:02:19:33, Root_Priority:0x0 Path_Cost:0

<183> OCT 28 17:23:08 192.168.2.2-1 DOT1S[125600896]: dot1s_debug.c(1451) 5919 %% Pkt TX - Intf:1/0/27(27), Source_Mac:00:1e:4f:02:19:35, Version:2, Root_Mac:00:1e:4f:02:19:33, Root_Priority:0x0 Path_Cost:0

<183> OCT 28 17:23:08 192.168.2.2-1 DOT1S[125600896]: dot1s_debug.c(1451) 5920 %% Pkt TX - Intf:0/3/1(626), Source_Mac:00:1e:4f:02:19:35, Version:2, Root_Mac:00:1e:4f:02:19:33, Root_Priority:0x0 Path_Cost:0

<183> OCT 28 17:23:08 192.168.2.2-1 DOT1S[125600896]: dot1s_debug.c(1451) 5921 %% Pkt TX - Intf:0/3/8(633), Source_Mac:00:1e:4f:02:19:35, Version:2, Root_Mac:00:1e:4f:02:19:33, Root_Priority:0x0 Path_Cost:0

<183> OCT 28 17:23:08 192.168.2.2-1 DOT1S[125600896]: dot1s_debug.c(1451) 5922 %% Pkt TX - Intf:0/3/15(640), Source_Mac:00:1e:4f:02:19:35, Version:2, Root_Mac:00:1e:4f:02:19:33, Root_Priority:0x0 Path_Cost:0

==================================================
Stacked core (sw040):
==================================================

sw040#show lacp port-channel 48

Actor:
system priority: 1
system mac addr: 001E.4F0F.3F35
Partner:
system priority: 1
system mac addr: 001E.4F02.1933

sw040#show interfaces detail ethernet 1/g2

Port Type Duplex Speed Neg Admin Link
State State
----- ------------------------------ ------ ------- ---- ----- -----
1/g2 Gigabit - Level N/A Unknown Auto Up Down

Port Description
---- --------------------------------------------------------------------------
1/g2

Flow Control:Enabled
Port: 1/g2
VLAN Membership mode:Access Mode

Operating parameters:
PVID: 1
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged
Default Priority: 0
GVRP status:Disabled
Protected:Disabled

Port 1/g2 is member in:

VLAN Name Egress rule Type
---- --------------------------------- ----------- --------
1 Default Untagged Default

Static configuration:
PVID: 1
Ingress Filtering: Enabled
Acceptable Frame Type: Untagged

Port 1/g2 is statically configured to:

VLAN Name Egress rule
---- --------------------------------- -----------

Forbidden VLANS:
VLAN Name
---- ---------------------------------

Port 1/g2 Enabled
State: Disabled Role: Disabled
Port id: 128.2 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 80:00:00:1E:4F:0F:3F:33
Designated port id: 128.2 Designated path cost: 20000
CST Regional Root: 80:00:00:1E:4F:0F:3F:33 CST Port Cost: 0
BPDU: sent 29919, received 0

sw040#show interfaces detail ethernet 2/g2

Port Type Duplex Speed Neg Admin Link
State State
----- ------------------------------ ------ ------- ---- ----- -----
2/g2 Gigabit - Level Full 1000 Auto Up Up

Port Description
---- --------------------------------------------------------------------------
2/g2

Flow Control:Enabled

sw040#show tech-support (Excerpt from show tech-support command on core):

Management Standby Preconfig Plugged-in Switch Code
Switch Switch Status Model ID Model ID Status Version
------ ------------ ------------- ------------- --------------------- --------
1 Mgmt Switch PCT6248 PCT6248 OK 3.3.7.2
2 Stack Member PCT6248 PCT6248 OK 3.3.7.2

Admin Physical Physical Link Link LACP
Intf Type Mode Mode Status Status Trap Mode
------ ------ ------- ---------- ---------- ------ ------- -------
1/g1 Enable Auto 1000 Full Up Enable Disable
1/g2 PC Mbr Enable Auto Down Enable Enable
2/g2 PC Mbr Enable Auto 1000 Full Up Enable Enable
ch48 Enable Up Disable Disable

***************** Show Isdp Neighbors *****************

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge,
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Intf Holdtime Capability Platform Port ID
---------------------- ------- --------- ------------ -------------------- ----------------------
sw038 2/g2 152 R PCT6248 1/0/10

sw040#show spanning-tree summary

Spanning Tree Adminmode........... Enabled
Spanning Tree Version............. IEEE 802.1w
BPDU Guard Mode................... Disabled
BPDU Flood Mode................... Disabled

Portfast BPDU filtering :....... Disabled
Configuration Name................ 00-1E-4F-0F-3F-33
Configuration Revision Level...... 0
Configuration Digest Key.......... 0xac36177f50283cd4b83821d8ab26de62
Configuration Format Selector..... 0

sw040#show spanning-tree port-channel 48

Port ch48 Enabled
State: Forwarding Role: Root
Port id: 96.673 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 00:1E:4F:02:19:33
Designated port id: 96.640 External path cost: 20000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
BPDU: sent 5, received 38634

sw040#show spanning-tree active
Spanning tree Enabled (BPDU flooding : Disabled) Portfast BPDU filtering Disabled mode rstp
CST Regional Root: 80:00:00:1E:4F:0F:3F:33
Regional Root Path Cost: 0

###### MST 0 Vlan Mapped: 1
ROOT ID
Address 00:1E:4F:02:19:33
Path Cost 20000
Root Port ch48
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Bridge ID
Priority 32768
Address 80:00:00:1E:4F:0F:3F:33
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Interfaces

Name State Prio.Nbr Cost Sts Role PortFast RestrictedPort
------ -------- --------- ---------- ---- ----- -------- -------
1/g1 Enabled 128.1 20000 FWD Desg No No
ch48 Enabled 96.673 20000 FWD Root No No

sw040#show spanning-tree detail active
Spanning tree Enabled (BPDU flooding : Disabled) Portfast BPDU filtering Disabled mode rstp
CST Regional Root: 80:00:00:1E:4F:0F:3F:33
Regional Root Path Cost: 0
ROOT ID
Address 00:1E:4F:02:19:33
Path Cost 20000
Root Port ch48
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Bridge ID
Priority 32768
Address 80:00:00:1E:4F:0F:3F:33
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec

Number of topology changes 3 last change occurred 0d22h58m41s ago
Times: hold 6, hello 2, max age 20, forward delay 15

Port 1/g1 Enabled
State: Forwarding Role: Designated
Port id: 128.1 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 00:1E:4F:0F:3F:33
Designated port id: 128.1 External path cost: 20000
CST Regional Root: 80:00:00:1E:4F:0F:3F:33 CST Port Cost: 0
BPDU: sent 42209, received 0

Port 2/g2 Enabled
State: Forwarding Role: Disabled
Port id: 128.54 Port Cost: 0
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 00:1E:4F:0F:3F:33
Designated port id: 128.54 External path cost: 0
CST Regional Root: 80:00:00:1E:4F:0F:3F:33 CST Port Cost: 0
BPDU: sent 5, received 4

Port ch48 Enabled
State: Forwarding Role: Root
Port id: 96.673 Port Cost: 20000
Port Fast: No (Configured: no ) Root Protection: No
Designated bridge Priority: 32768 Address: 00:1E:4F:02:19:33
Designated port id: 96.640 External path cost: 20000
CST Regional Root: 00:00:00:1E:4F:02:19:33 CST Port Cost: 0
BPDU: sent 5, received 41372

sw040#show spanning-tree blockedports
Spanning tree Enabled (BPDU flooding : Disabled) mode rstp
CST Regional Root: 80:00:00:1E:4F:0F:3F:33
Regional Root Path Cost: 0

###### MST 0 Vlan Mapped: 1
ROOT ID
Address 00:1E:4F:02:19:33
Path Cost 20000
Root Port ch48
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Bridge ID
Priority 32768
Address 80:00:00:1E:4F:0F:3F:33
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Interfaces

Name State Prio.Nbr Cost Sts Role PortFast RestrictedPort
------ -------- --------- ---------- ---- ----- -------- -------
1/g2 Enabled 128.2 20000 DSC Desg No No

sw040#show spanning-tree blockedports
Spanning tree Enabled (BPDU flooding : Disabled) mode rstp
CST Regional Root: 80:00:00:1E:4F:0F:3F:33
Regional Root Path Cost: 0

###### MST 0 Vlan Mapped: 1
ROOT ID
Address 00:1E:4F:02:19:33
Path Cost 20000
Root Port ch48
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Bridge ID
Priority 32768
Address 80:00:00:1E:4F:0F:3F:33
Hello Time 2 Sec Max Age 20 sec Forward Delay 15 sec
Interfaces

Name State Prio.Nbr Cost Sts Role PortFast RestrictedPort
------ -------- --------- ---------- ---- ----- -------- -------

sw040#show interfaces port-channel 48

Channel Ports Hash Algorithm Type
------- ----------------------------- -------------------
ch48 Active: 2/g2 3
Inactive: 1/g2

Hash Algorithm Type
1 - Source MAC, VLAN, EtherType, source module and port Id
2 - Destination MAC, VLAN, EtherType, source module and port Id
3 - Source IP and source TCP/UDP port
4 - Destination IP and destination TCP/UDP port
5 - Source/Destination MAC, VLAN, EtherType, source MODID/port
6 - Source/Destination IP and source/destination TCP/UDP port