09-25-2024 12:35 AM - edited 09-25-2024 12:41 AM
I've been trying to work create a network with multilayer 3650, that has STP and DHCP, and got stuck on the STP part.
here are the commands I put in my topology, in the order I put them -
MU -
int ra g1/0/3-5
switchport mode trunk
switchport trunk allowed vlan all
A0
vlan 77
name MNG
ex
vlan 37
name FIN
ex
A1
vlan 64
name HR
ex
vlan 55
name SL
ex
A2
vlan 114
name MKT
ex
vlan 154
name TSP
ex
MU
vlan 77
name MNG
ex
vlan 37
name FIN
ex
vlan 64
name HR
ex
vlan 55
name SL
ex
vlan 114
name MKT
ex
vlan 154
name TSP
ex
A0
int ra fa0/1-6
switchport mode access
switchport access vlan 37
ex
int ra fa0/7-12
switchport mode access
switchport access vlan 77
ex
A1
int ra fa0/1-6
switchport mode access
switchport access vlan 55
ex
int ra fa0/7-12
switchport mode access
switchport access vlan 64
ex
A2
int ra fa0/1-6
switchport mode access
switchport access vlan 114
ex
int ra fa0/7-12
switchport mode access
switchport access vlan 154
ex
All SWs
spanning-tree mode rapid-pvst
A0
spanning-tree vlan 37,77
A1
spanning-tree vlan 55,64
A2
spanning-tree vlan 154,114
MU0 -
spanning-tree vlan 1,77,37,64 root primary
spanning-tree vlan 55,114,154 root secondary
MU1 -
spanning-tree vlan 55,114,154 root primary
spanning-tree vlan 1,77,37,64 root secondary
All of the access sws
interface range fastethernet0/1-12
spanning-tree bpduguard enable
spanning-tree portfast
exit
MU
interface range g1/0/3,g1/0/4,g1/0/5
spanning-tree guard root
After a few minutes, I got this in MU0 -
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/6, changed state to up
%SPANTREE-2-ROOTGUARDBLOCK: Port 1/0/5 tried to become non-designated in VLAN 154.
Moved to root-inconsistent state
%SPANTREE-2-ROOTGUARDBLOCK: Port 1/0/5 tried to become non-designated in VLAN 114.
Moved to root-inconsistent state
%SPANTREE-2-ROOTGUARDBLOCK: Port 1/0/4 tried to become non-designated in VLAN 55.
Moved to root-inconsistent state
And this in MU1 -
SPANTREE-2-ROOTGUARDBLOCK: Port 1/0/3 tried to become non-designated in VLAN 37.
Moved to root-inconsistent state
%SPANTREE-2-ROOTGUARDBLOCK: Port 1/0/3 tried to become non-designated in VLAN 77.
Moved to root-inconsistent state
%SPANTREE-2-ROOTGUARDBLOCK: Port 1/0/4 tried to become non-designated in VLAN 64.
Moved to root-inconsistent state
I dont understand why this keep happening
Solved! Go to Solution.
09-25-2024 01:41 AM
One more point add same vlan in all SW
I see you add only two vlan in two SW add all VLAN
MHM
09-25-2024 12:40 AM
Vlan allow in trunk must match in SW
09-25-2024 01:06 AM
I've redid it with
interface g1/0/3
switchport mode trunk
switchport trunk allowed vlan 37,77
ex
int g1/0/4
switchport mode trunk
switchport trunk allowed vlan 55,64
ex
int g1/0/5
switchport mode trunk
switchport trunk allowed vlan 114,154
ex
and still get the same problem
09-25-2024 01:11 AM - edited 09-25-2024 01:12 AM
This needed
interface g1/0/3
switchport mode trunk
switchport trunk allowed vlan 37,77, 55,64,114,154
ex
int g1/0/4
switchport mode trunk
switchport trunk allowed vlan
37,77, 55,64,114,154
int g1/0/5
switchport mode trunk
switchport trunk allowed vlan 37,77, 55,64,114,154
ex
09-25-2024 01:24 AM
Tried that and got the same result
09-25-2024 01:29 AM
Friend allow same vlan in all trunk in your network' that what you need
MHM
09-25-2024 01:41 AM
One more point add same vlan in all SW
I see you add only two vlan in two SW add all VLAN
MHM
09-25-2024 02:43 AM
that seems to work, thank you so much!!
09-25-2024 02:46 AM
You are welcome
MHM
09-25-2024 01:23 AM - edited 09-25-2024 01:24 AM
⠀
09-25-2024 02:25 AM
Easier to help if you attach the PacketTracer file here. Just zip it first.
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