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1538
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5
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spanning tree log messages

michaewlewis
Level 1
Level 1

I have a couple of cisco switches (3850X connected to Stratix 5700) that I'm getting these log messages when I up/down a link. Errors only show up on the stratix switch, not the 3850. I've been through making sure my spanning-tree root is set properly on my core switch, turned off igmp snooping (which had caused me issues a few years ago), tried setting native vlans.... I got it to the point where the link will actually come up and stay up, but it's still throwing these errors and I want to clean that up. None of my other switches do this. This is a brand new setup and have a bit of freedom to try things out for a day or two. Any advice is appreciated.

 

 

 

Jun  9 17:54:54.459: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan15, changed state to down
Jun  9 17:54:55.457: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to down
Jun  9 17:54:56.456: %LINK-3-UPDOWN: Interface GigabitEthernet1/2, changed state to down
Jun  9 17:54:58.804: %LINK-3-UPDOWN: Interface GigabitEthernet1/2, changed state to up
Jun  9 17:54:59.962: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 15 on GigabitEthernet1/2 VLAN200.
Jun  9 17:54:59.962: %SPANTREE-2-BLOCK_PVID_PEER: Blocking GigabitEthernet1/2 on VLAN0015. Inconsistent peer vlan.
Jun  9 17:54:59.962: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking GigabitEthernet1/2 on VLAN0200. Inconsistent local vlan.
Jun  9 17:55:00.818: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to up
Jun  9 17:55:14.969: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking GigabitEthernet1/2 on VLAN0015. Port consistency restored.
Jun  9 17:55:14.969: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking GigabitEthernet1/2 on VLAN0200. Port consistency restored.
Jun  9 17:55:16.421: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan15, changed state to up

3850X#
interface GigabitEthernet1/0/47
 description Trunk
 switchport mode trunk
 ip dhcp snooping trust
!

Stratix5700#
interface GigabitEthernet1/2
 switchport mode trunk
 ip dhcp snooping trust
!

 

 

 

3 Replies 3

since one end is not cisco vendor SO
check the native VLAN 
cisco send native VLAN untag 
other vender always send tag for each VLAN

check the STP in both SW 
i.e. check if cisco run RSTP and other vendor run PVST.

Stratix is a Cisco industrial switch (rebranded by Rockwell). It's the same as the Cisco IE series switch with some layer 5-7 stuff thrown in. Both sides are set up identically but only the Stratix is throwing these errors.

Hope I am right
there is mismatch between the SW STP protocol run
the Cisco can run PVST
but Other Vendor (run different IOS than Cisco), run legacy STP,
so it only know the BPDU of native VLAN "VLAN1"
but since cisco run PVST it send many BPDU each one using Bridge ID (include VLAN-ID) and this BPDU is tag and here the issue, 
Other Vendor to know this BDPU and log message appear.

so to be sure 
run only VLAN1 and see 
or 
try STP not PVST in cisco side.