03-08-2010 12:15 AM - edited 03-06-2019 10:02 AM
hi,
I'm trying to configure trunking on our two switches, the switches are in two different location, that are inter-connected via L2 service provider.
SW1(3550) --- Service Provider --- SW2(3550)
Site A Site B
Here are some logs to help you on understanding my issue.
From SW1:
Config:
interface FastEthernet0/18
description *** This connects to Equinix ***
switchport trunk encapsulation dot1q
switchport mode trunk
speed 100
duplex full
end
Trunk Status:
Port Mode Encapsulation Status Native vlan
Fa0/18 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa0/18 1-4094
Port Vlans allowed and active in management domain
Fa0/18 1,3-4,100
Port Vlans in spanning tree forwarding state and not pruned
Fa0/18 none
Logs:
Mar 2 03:36:05.238: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk FastEthernet0/18 VLAN1.
Mar 2 03:36:05.238: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking FastEthernet0/18 on VLAN0001. Inconsistent port type.
Mar 2 03:41:28.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/18, changed state to down
Mar 2 03:41:31.199: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/18, changed state to up
Mar 2 03:41:31.227: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 25 on FastEthernet0/18 VLAN1.
Mar 2 03:41:31.227: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/18 on VLAN0001. Inconsistent local vlan.
From SW2:
Config
interface FastEthernet0/1
description *** this connects to Global Switch ***
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
end
According to the our service provider "vlan untagged" was configured on their equipment where SW1 was connected.
Please help, I need to setup the trunking between the two switch ASAP.
Thanks,
Rachelle
03-08-2010 12:34 AM
HI,
I am suspecting the config with ISP switch.In ISP switches they used to configure QinQ tunneling to give service to multiple customers via the same switch.
If they have not configured properly for your connectivity then you night face this issue.
From cisco web
#
%SPANTREE-7-RECV_1Q_NON_TRUNK : Received 802.1Q BPDU on non trunk [chars] [chars].
Explanation An SSTP BPDU that was not operationally a trunk has been received on the specified interface.
Recommended Action Verify that the configuration and operational state of the listed interface and that of the interface to which it is connected have the same mode (access or trunk). If the mode is trunk, verify the same encapsulation (none, ISL or 802.1Q). Once these parameters are consistent, spanning tree will automatically unblock the interfaces as appropriate.
For more information about qinq tunneling just have a look into the below URL
Regards
Karuppu
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