Regarding spanning-tree

[prashanth.s.kannur]

Hi

I have a switch where server are connected and this switch is connected to Core sw(VSS)[T1/1/1,T2/1/1] throught Portchannel(TE1/0/1,1/0/2).

I am using LACP for portchannel, native vlan is 1 on both the sw, core is root with priority 0 and access has 28672. 

on port Te1/0/21 a server[d067.e5ee.d5d7] is connected. I am getting a below error, one of the port ie te1/0/1 on access which is going down due to below log message, kindly let me know what would be the issue.

Currently i have removed the physical cable on port te1/0/1 due to the below error.

Aug 21 09:38:07.433 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:38:10.425 UTC: %SW_MATM-4-MACFLAP_NOTIF: Host d067.e5ee.d5d7 in vlan 1 is flapping between port Po1 and port Gi1/0/21
Aug 21 09:38:11.246 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:38:14.832 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0101.
Aug 21 09:38:16.108 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0100.
Aug 21 09:38:16.112 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to down
Aug 21 09:38:34.161 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0100. Inconsistent peer vlan.
Aug 21 09:38:34.161 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0001. Inconsistent local vlan.
Aug 21 09:38:35.161 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0102. Inconsistent peer vlan.
Aug 21 09:38:37.234 UTC: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on Port-channel1 VLAN1.
Aug 21 09:38:49.163 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0100. Port consistency restored.
Aug 21 09:38:50.162 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0102. Port consistency restored.
Aug 21 09:38:51.169 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0101. Inconsistent local vlan.
Aug 21 09:38:57.160 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0102. Inconsistent peer vlan.
Aug 21 09:39:00.987 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0001.
Aug 21 09:39:02.162 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0001. Port consistency restored.
Aug 21 09:39:08.998 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0001.
Aug 21 09:39:12.162 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0102. Port consistency restored.
Aug 21 09:39:12.162 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0101. Port consistency restored.
Aug 21 09:39:17.639 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0106. Inconsistent peer vlan.
Aug 21 09:39:17.639 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0104. Inconsistent local vlan.
Aug 21 09:39:19.170 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to up
Aug 21 09:39:31.288 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0102. Inconsistent local vlan.
Aug 21 09:39:33.175 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:39:34.933 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0101.
Aug 21 09:39:36.209 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0100.
Aug 21 09:39:36.216 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to down
Aug 21 09:39:36.244 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to up
Aug 21 09:39:41.490 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:39:42.937 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:39:45.300 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:39:46.289 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0104. Port consistency restored.
Aug 21 09:39:46.289 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0102. Port consistency restored.
Aug 21 09:39:48.282 UTC: %SW_MATM-4-MACFLAP_NOTIF: Host d067.e5ee.d5d7 in vlan 1 is flapping between port Po1 and port Gi1/0/21
Aug 21 09:39:49.131 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:39:52.259 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0100.
Aug 21 09:39:52.263 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to down
Aug 21 09:39:53.329 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0104.
Aug 21 09:40:04.063 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0106. Inconsistent local vlan.
Aug 21 09:40:07.757 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0104. Inconsistent local vlan.
Aug 21 09:40:13.143 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0001.
Aug 21 09:40:19.145 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0001.
Aug 21 09:40:22.759 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:40:22.759 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0104. Port consistency restored.
Aug 21 09:40:25.184 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0001.
Aug 21 09:40:35.198 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0001.
Aug 21 09:40:35.230 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0001. Inconsistent peer vlan.
Aug 21 09:40:35.230 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0101. Inconsistent local vlan.
Aug 21 09:40:46.121 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0106. Inconsistent local vlan.
Aug 21 09:40:50.231 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0001. Port consistency restored.
Aug 21 09:40:50.231 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0101. Port consistency restored.
Aug 21 09:40:51.395 UTC: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on Port-channel1 VLAN1.
Aug 21 09:40:51.843 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0001. Inconsistent local vlan.
Aug 21 09:41:03.398 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0101. Inconsistent local vlan.
Aug 21 09:41:03.426 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0104. Inconsistent peer vlan.
Aug 21 09:41:05.401 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0102. Inconsistent peer vlan.
Aug 21 09:41:11.123 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:41:15.240 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:41:17.155 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0101.
Aug 21 09:41:18.382 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0100.
Aug 21 09:41:18.393 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to up
Aug 21 09:41:18.400 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0101. Port consistency restored.
Aug 21 09:41:18.428 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0104. Port consistency restored.
Aug 21 09:41:20.402 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0102. Port consistency restored.
Aug 21 09:41:20.402 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0001. Port consistency restored.
Aug 21 09:41:23.702 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:41:27.505 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:41:30.381 UTC: %SW_MATM-4-MACFLAP_NOTIF: Host d067.e5ee.d5d7 in vlan 1 is flapping between port Po1 and port Gi1/0/21
Aug 21 09:41:30.427 UTC: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 100 on Port-channel1 VLAN1.
Aug 21 09:41:30.427 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0100. Inconsistent peer vlan.
Aug 21 09:41:30.427 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0001. Inconsistent local vlan.
Aug 21 09:41:30.444 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to down
Aug 21 09:41:31.231 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:41:35.226 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0101.
Aug 21 09:41:45.428 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0100. Port consistency restored.
Aug 21 09:41:45.428 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0001. Port consistency restored.
Aug 21 09:41:50.266 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0106. Inconsistent local vlan.
Aug 21 09:41:57.319 UTC: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port Port-channel1 on VLAN0001.
Aug 21 09:41:59.542 UTC: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on Port-channel1 VLAN1.
Aug 21 09:42:05.267 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:42:07.515 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0001. Inconsistent local vlan.
Aug 21 09:42:10.308 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0106. Inconsistent local vlan.
Aug 21 09:42:13.548 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0104. Inconsistent peer vlan.
Aug 21 09:42:15.435 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to up
Aug 21 09:42:19.360 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0101. Inconsistent local vlan.
Aug 21 09:42:19.518 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0102. Inconsistent peer vlan.
Aug 21 09:42:25.309 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:42:28.549 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0104. Port consistency restored.
Aug 21 09:42:30.311 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0106. Inconsistent local vlan.
Aug 21 09:42:31.517 UTC: %SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on Port-channel1 VLAN1.
Aug 21 09:42:34.519 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0102. Port consistency restored.
Aug 21 09:42:35.519 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0102. Inconsistent peer vlan.
Aug 21 09:42:45.313 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:42:47.543 UTC: %SPANTREE-2-BLOCK_PVID_PEER: Blocking Port-channel1 on VLAN0104. Inconsistent peer vlan.
Aug 21 09:42:52.310 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking Port-channel1 on VLAN0106. Inconsistent local vlan.
Aug 21 09:42:59.647 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:43:01.314 UTC: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port Port-channel1 on VLAN0101.
Aug 21 09:43:07.312 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0106. Port consistency restored.
Aug 21 09:43:08.119 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:43:11.782 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down
Aug 21 09:43:12.520 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0102. Port consistency restored.
Aug 21 09:43:12.520 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0101. Port consistency restored.
Aug 21 09:43:12.551 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0104. Port consistency restored.
Aug 21 09:43:12.551 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking Port-channel1 on VLAN0001. Port consistency restored.
Aug 21 09:43:15.365 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to up
Aug 21 09:43:16.749 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/1, changed state to down

[Cisco Freak]

Hello Prasanth,

Do you have Cisco devices at both the ends?

Also, can you please check trunk configuration at both the ends. Check the native vlan for the trunks.

CF

[prashanth.s.kannur]

HI 

Both are cisco device. Core switch is 4500X and access switch is 2960X. on both side native vlan is 1.

With one link its works fine, the moment i connect another link in the port-channel, i will get the error.

[Moh Mogh]

Well, seems to be a spanning-tree loop, maybe because of a VM...

Can you paste the port-channel configuration on both sides? For PO interfaces as well as the ethernet interfaces on both sides.

Also the output of the following on both switches:

show mac-adress address d067.e5ee.d5d7