Spanning tree is used to protect the network against layer2 loops.
It is not recommended to add/adjust these settings while a system is running.
The following configuration is applied to each of the Spine VSX pairs, this config is identical.
spanning-tree mode rpvst
spanning-tree
spanning-tree priority 7
spanning-tree vlan 1,2,4,7,10
Verify that each VSX pair is the root bridge for all VLANs configured on that switch.
sw-spine-001# show spanning-tree summary root
STP status : Enabled
Protocol : RPVST
System ID : 02:01:00:00:01:00
Root bridge for VLANs : 1,2,4,7,10
Root Hello Max Fwd
VLAN Priority Root ID cost Time Age Dly Root Port
-------- -------- ----------------- --------- ----- --- --- ------------
VLAN1 32768 02:01:00:00:01:00 0 2 20 15 0
VLAN2 32768 02:01:00:00:01:00 0 2 20 15 0
VLAN4 32768 02:01:00:00:01:00 0 2 20 15 0
VLAN7 32768 02:01:00:00:01:00 0 2 20 15 0
VLAN10 32768 02:01:00:00:01:00 0 2 20 15 0
The following configuration is applied to Aruba leaf/Aggregation switches.
spanning-tree mode rpvst
spanning-tree
spanning-tree vlan 1,2,4,7,10
Verify Spanning tree is configured and we are not the Root Bridge for any VLANs.
sw-leaf-001# show spanning-tree summary root
STP status : Enabled
Protocol : RPVST
System ID : 88:3a:30:9f:24:80
Root bridge for VLANs :
Root Hello Max Fwd
VLAN Priority Root ID cost Time Age Dly Root Port
-------- -------- ----------------- --------- ----- --- --- ------------
VLAN1 32768 02:01:00:00:01:00 800 2 20 15 lag1
VLAN2 32768 02:01:00:00:01:00 800 2 20 15 lag1
VLAN4 32768 02:01:00:00:01:00 800 2 20 15 lag1
VLAN7 32768 02:01:00:00:01:00 800 2 20 15 lag1
VLAN10 32768 02:01:00:00:01:00 800 2 20 15 lag1
The following config is applied to Aruba CDU switches.
If there are more 2xxx or 3xxx VLANs you will add them to the spanning-tree vlan list
spanning-tree mode rpvst
spanning-tree
spanning-tree vlan 1,2,4,2000,3000,4091
Verify that each CDU switch is the root bridge for VLANs 2xxx and 3xxx
sw-cdu-002# show spanning-tree summary root
STP status : Enabled
Protocol : RPVST
System ID : 02:01:00:00:01:02
Root bridge for VLANs : 2000,3000,4091
Root Hello Max Fwd
VLAN Priority Root ID cost Time Age Dly Root Port
-------- -------- ----------------- --------- ----- --- --- ------------
VLAN1 32768 02:01:00:00:01:00 200 2 20 15 lag149
VLAN2 32768 02:01:00:00:01:00 200 2 20 15 lag149
VLAN4 32768 02:01:00:00:01:00 200 2 20 15 lag149
VLAN2000 32768 02:01:00:00:01:02 0 2 20 15 0
VLAN3000 32768 02:01:00:00:01:02 0 2 20 15 0
VLAN4091 32768 02:01:00:00:01:02 0 2 20 15 0
Spanning tree configuration has not changed on Dell switches from 1.3 to 1.4
Dell leaf configuration
spanning-tree vlan 1-2,4,7,10 priority 61440
Dell CDU configuration
spanning-tree vlan 1-2,4,4091 priority 61440
Spanning tree will need to be applied to each MAGP pair. Spine01 will have a lower priority making it the root bridge. Spanning tree configuration has not changed from 1.3 to 1.4.
## STP configuration
##
spanning-tree mode rpvst
spanning-tree port type edge default
interface ethernet 1/13-1/14 spanning-tree port type network
interface ethernet 1/15/1-1/15/2 spanning-tree port type network
interface mlag-port-channel 113 spanning-tree port type network
interface mlag-port-channel 151-152 spanning-tree port type network
interface ethernet 1/13-1/14 spanning-tree guard root
interface ethernet 1/15/1-1/15/2 spanning-tree guard root
interface mlag-port-channel 113 spanning-tree guard root
interface mlag-port-channel 151-152 spanning-tree guard root
spanning-tree port type edge bpdufilter default
spanning-tree port type edge bpduguard default
spanning-tree vlan 1-2 priority 0
spanning-tree vlan 4 priority 0
spanning-tree vlan 7 priority 0
spanning-tree vlan 10 priority 0