Spanning tree issue on C1111 router

[WilsonCheng]

Spanning tree was configured and enabled on C1111 router, but show spanning tree shows no spanning tree information as below. Does anyone know what the issue is and how to fix it? Thank you.

router#sh run | s spanning
spanning-tree extend system-id
spanning-tree vlan 1,599,990 priority 61440

router#sh ip int brief
Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0/0   #####    YES NVRAM  up                    up      
GigabitEthernet0/0/1   unassigned      YES NVRAM  administratively down down    
GigabitEthernet0/1/0   unassigned      YES unset  up                    up      
GigabitEthernet0/1/1   unassigned      YES unset  administratively down down    
GigabitEthernet0/1/2   unassigned      YES unset  administratively down down    
GigabitEthernet0/1/3   unassigned      YES unset  up                    up      
Vlan1                  unassigned      YES unset  administratively down down    
Vlan599                10.250.182.226  YES NVRAM  up                    up      
Vlan990                10.41.98.2      YES NVRAM  up                    up      

router#sh spanning-tree
No spanning tree instance exists.

router#sh spanning-tree sum
Switch is in rapid-pvst mode
Root bridge for: none
EtherChannel misconfig guard            is enabled
Extended system ID                      is enabled
Portfast Default                        is disabled
PortFast BPDU Guard Default            is disabled
Portfast BPDU Filter Default           is disabled
Loopguard Default                      is disabled
UplinkFast                              is disabled
BackboneFast                            is disabled
Configured Pathcost method used is short

Name                   Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
Total                        0         0        0          0          0

[balaji.bandi]

This is an Router, until you have a switch module in it, it can not act as a switch, so that is normal 

[WilsonCheng]

Hello,

The router has a switched module and the trunk port allows the vlans. All
C1111 routers in our network also have the same issue. I wonder if it is a
bug.

router#sh run | s vlan
spanning-tree vlan 1,599,990 priority 61440
vlan internal allocation policy ascending
vlan 599
name UNTRUSTED_DEVICES
vlan 990
name DEVICE_MANAGEMENT

router#sh int trunk

Port Mode Encapsulation Status Native vlan
Gi0/1/0 on 802.1q trunking 990

Port Vlans allowed on trunk
Gi0/1/0 1-4094

Port Vlans allowed and active in management domain
Gi0/1/0 1,599,990

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1/0 1,599,990

[balaji.bandi]

ok as per the output the spanning-tree running :

try below :

show spanning-tree vlan 599

show spanning-tree vlan 900

https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/4_8PortGENIM.html#pgfId-1079138

[WilsonCheng]

router#sh spanning-tree vlan 599

Spanning tree instance(s) for vlan 599 does not exist.

router#sh spanning-tree vlan 990

Spanning tree instance(s) for vlan 990 does not exist

[paul driver]

Hello
do you have any ports assigned to those vlans that are active or even an active trunk?

Also have you created the vlans?

vlan 599,990

exit

[WilsonCheng]

Hello,

The vlans were created and the trunk port allowed the vlans. All C1111
routers in
our network also have the same issue. I wonder if it is a bug.

router#sh run | s vlan
spanning-tree vlan 1,599,990 priority 61440
vlan internal allocation policy ascending
vlan 599
name UNTRUSTED_DEVICES
vlan 990
name DEVICE_MANAGEMENT

router#sh int trunk

Port Mode Encapsulation Status Native vlan
Gi0/1/0 on 802.1q trunking 990

Port Vlans allowed on trunk
Gi0/1/0 1-4094

Port Vlans allowed and active in management domain
Gi0/1/0 1,599,990

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1/0 1,599,990

[paul driver]

Hello

---

@WilsonCheng wrote:

Port Vlans allowed on trunk
Gi0/1/0 1-4094

Port Vlans allowed and active in management domain
Gi0/1/0 1,599,990

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1/0 1,599,990

---

Looks like you do have stp running

show spanning-tree interface gig0/1/0

[WilsonCheng]

I am not sure if the spanning tree is running or not.
Show spanning tree is no spanning information.

Router#show spanning-tree interface gig0/1/0
no spanning tree info available for GigabitEthernet0/1/0

[paul driver]

Hello

can you post the output of the following into a file and attach to this post.:

sh ip int brief

sh vlan brief 

sh cdp neighbour 

sh in trunk

sh spanning-tree detail

sh run

ah version 

[WilsonCheng]

router#sh ip int brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0/0 xxxxxxxxxxxx YES NVRAM up up
GigabitEthernet0/0/1 unassigned YES NVRAM administratively down down
GigabitEthernet0/1/0 unassigned YES unset up up
GigabitEthernet0/1/1 unassigned YES unset administratively down down
GigabitEthernet0/1/2 unassigned YES unset administratively down down
GigabitEthernet0/1/3 unassigned YES unset up up
Vlan1 unassigned YES unset administratively down down
Vlan599 10.250.182.226 YES NVRAM up up
Vlan990 10.41.98.2 YES NVRAM up up
router#
router#sh vlan brief

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi0/1/1, Gi0/1/2
599 UNTRUSTED_DEVICES active
990 DEVICE_MANAGEMENT active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup

router#sh spanning-tree detail

No spanning tree instance exists.


router#sh run | s spanning
spanning-tree extend system-id
spanning-tree vlan 1,599,990 priority 61440

router#sh cdp nei
router#sh cdp neighbors
% CDP is not enabled
router#sh int trun

Port Mode Encapsulation Status Native vlan
Gi0/1/0 on 802.1q trunking 990

Port Vlans allowed on trunk
Gi0/1/0 1-4094

Port Vlans allowed and active in management domain
Gi0/1/0 1,599,990

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1/0 1,599,990
router#sh ver
Cisco IOS XE Software, Version 16.09.07
Cisco IOS Software [Fuji], ISR Software (ARMV8EB_LINUX_IOSD-UNIVERSALK9_IAS-M), Version 16.9.7, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2021 by Cisco Systems, Inc.
Compiled Wed 10-Feb-21 08:19 by mcpre


Cisco IOS-XE software, Copyright (c) 2005-2021 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
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cisco C1111-4P (1RU) processor with 1452657K/6147K bytes of memory.
Processor board ID FGL2528L5VT
3 Virtual Ethernet interfaces
6 Gigabit Ethernet interfaces
4294966432 terminal lines
32768K bytes of non-volatile configuration memory.
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Configuration register is 0x2102

[Georg Pauwen]

Hello,

I haven't followed the entire discussion, but by default, spanning tree is disabled for all Vlans on the C1111.

You need to manually enable it:

C1111(config)# spanning-tree vlan 599

[WilsonCheng]

The spanning-tree vlan x command was already configured before and accepted
with no error but it doesn't show up in running configuration.

router#sh run | s spanning
spanning-tree extend system-id
spanning-tree vlan 1,599,990 priority 61440

router#sh spanning-tree vlan 599
Spanning tree instance(s) for vlan 599 does not exist.

[paul driver]

Hello

it does seem unusual that the rtr is stating the vlan are in a stp forwarding state but stp is not running

I-believe what @Georg Pauwen is stating is to re apply stp again without any priority 

spanning-tree vlan 599

spanning-tree vlan 990

[WilsonCheng]

Hello Paul,

I have done the spanning-tree vlan x without priority with no error
prompt but I checked with the running configuration, it is not there. show
spanning tree still showed no spanning tree information. It is very
strange. I wonder if it is a bug or not.