Re: STP Problem ?

ney25 · ‎05-20-2008

Hi NetPro,

i have received this msg from syslogs.

does anyone who has the same problem before ? how do i find out the root cause ?

Core-Switch

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2008-05-15 01:38:57 Local7.Critical 172.17.0.3 2008 May 15 01:06:46 GMT8 +08:00 %SPANTREE-2-RX_1QPVIDERR: Rcved pvid_inc BPDU on 1Q port 2/2 vlan 144

2008-05-15 01:38:57 Local7.Critical 172.17.0.3 2008 May 15 01:06:46 GMT8 +08:00 %SPANTREE-2-RX_BLKPORTPVID: Block 2/2 on rcving vlan 144 for inc peer vlan 311

2008-05-15 01:38:57 Local7.Critical 172.17.0.3 2008 May 15 01:06:46 GMT8 +08:00 %SPANTREE-2-TX_BLKPORTPVID: Block 2/2 on xmtting vlan 311 for inc peer vlan

2008-05-15 01:39:11 Local7.Critical 172.17.0.3 2008 May 15 01:07:00 GMT8 +08:00 %SPANTREE-2-PORTUNBLK: Unblock previously inc port 2/2 on VLAN 144

2008-05-15 01:39:11 Local7.Critical 172.17.0.3 2008 May 15 01:07:00 GMT8 +08:00 %SPANTREE-2-PORTUNBLK: Unblock previously inc port 2/2 on VLAN 311

Server Farm Switch

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2008-05-15 01:38:05 Local7.Warning 172.17.0.50 60: May 15 01:38:05.004: %C4K_EBM-4-HOSTFLAPPING: Host 00:0A:8B:25:0B:FC in vlan 1 is flapping between port Gi1/1 and port Gi1/2

2008-05-15 01:38:05 Local7.Warning 172.17.0.50 61: May 15 01:38:05.392: %C4K_EBM-4-HOSTFLAPPING: Host 00:0A:8B:24:93:FC in vlan 1 is flapping between port Gi1/1 and port Gi1/2

2008-05-15 01:38:05 Local7.Warning 172.17.0.50 62: May 15 01:38:05.484: %C4K_EBM-4-HOSTFLAPPING: Host 00:00:68:16:3A:58 in vlan 1 is flapping between port Gi1/2 and port Gi1/1

2008-05-15 01:38:05 Local7.Warning 172.17.0.50 63: May 15 01:38:05.484: %C4K_EBM-4-HOSTFLAPPING: Host 00:0E:38:27:74:00 in vlan 1 is flapping between port Gi1/2 and port Gi1/1

2008-05-15 01:38:05 Local7.Warning 172.17.0.50 64: May 15 01:38:05.552: %C4K_EBM-4-HOSTFLAPPING: Host 00:00:68:16:2F:31 in vlan 1 is flapping between port Gi1/2 and port Gi1/1

2008-05-15 01:46:14 Local7.Warning 172.17.0.50 86: May 15 01:46:13.004: %C4K_EBM-4-HOSTFLAPPING: Host 00:0B:BE:4D:E7:0B in vlan 1 is flapping between port Gi1/1 and port Gi1/2

2008-05-15 01:46:14 Local7.Warning 172.17.0.50 87: May 15 01:46:13.004: %C4K_EBM-4-HOSTFLAPPING: Host 00:0B:BE:4D:E7:0A in vlan 1 is flapping between port Gi1/1 and port Gi1/2

2008-05-15 01:46:14 Local7.Warning 172.17.0.50 88: May 15 01:46:13.004: %C4K_EBM-4-HOSTFLAPPING: Host 00:0B:BE:4D:E7:09 in vlan 1 is flapping between port Gi1/1 and port Gi1/2

2008-05-15 01:46:14 Local7.Warning 172.17.0.50 89: May 15 01:46:13.004: %C4K_EBM-4-HOSTFLAPPING: Host 00:0B:BE:4D:E7:08 in vlan 1 is flapping between port Gi1/1 and port Gi1/2

Access Switch

------------- ( most of the switch have this error in the logs )

2008-05-15 01:44:32 Local7.Warning 172.17.0.20 2008 May 15 01:44:31 MKZ +08:00 %SYS-4-P2_WARN: 1/Protocol Packet DA=00:10:7b:ab:99:6f SA=00:10:7b:ab:99:6f arrived on unexpected port 1/2 cnt 1

2008-05-15 01:45:24 Local7.Warning 172.17.0.20 2008 May 15 01:45:22 MKZ +08:00 %SYS-4-P2_WARN: 1/Protocol Packet DA=00:10:7b:ab:99:6f SA=00:10:7b:ab:99:6f arrived on unexpected port 1/2 cnt 3

your reply will be highly appreciated.

thanks .

Regards,

Jack

Pravin Phadte · ‎05-20-2008

Hi,

Few things needs to be verified before any comment on the above problem.

How is this switches connected ?

Diagram would be helpful.

Running confg of the both switches.

ney25 · ‎05-20-2008

Hi Pravinxyz.

basically this is L2 network. which from Core-siwtch directly connected to Access Switch and Server Farm switch.

thanks.

Regards,

Jack

gpulos · ‎05-20-2008

This type of error, %SPANTREE-2-RX_1QPVIDERR, indicates a STP BPDU that was tagged and received by port 2/2 on the coreSwitch, has an inconsistent VLAN ID of the transmitting port.

(you currently have the coreSwitch 2/2 receiving port in VLAN 144 and the transmitting port in VLAN 311)

Either reconfigure your receiving port to have the same VLAN ID as the transmitting port or reconfigure the transmitting port to have the same VLAN ID as the receiving port.

If you still need help after doing that, send the config of both switches and we'll verify where the problem is.

cowetacoit · ‎05-20-2008

i had a similar problem once. I had a hostflap on a few of my switches. it ended up being a server with two NIC's on different networks, It had two default gateways.