STP Port type Network in VPC

Hi All,
I have a topology like two vpc peer connected to down catalyst switch 3750 with VPC 51. My left switch is primary in VPC and other is secondary.
if i enable spanning tree port type Network on VPC member ports and peer link. Then Secondary peer device start generating BPDU's and advertise its own bridge ID to Down host swich.
Then Can you explain how down switch react to that because in this scenario down switch recieve two different Bridge ID's one from Primary and other from Secondary on same port channel which is logical one port.
How it gonna handle this?
I read regardless of the Spanning-tree root, VPC primay always generate BPDU and seconday device only rely that bpdu and never generate itself.
what if somebody enable spanning tree port type Network towards down host switch on VPC member ports. Type network would generate BPDU's.

Hie Bhanu,
The STP is working as expected in your design. For a gig port port cost is 4. So for 1st 2950 cost to root is 8 thr 3550a. For 2nd 2950 cost to root is 12 thr 3550a and 16 thr 3550b so first one in preferred and later one is blocked. But for 3rd 2950 cost to root is 16 thr 3550a but thr 3550 b it is 12. Hence 3rd 2950 forwards traffic thr 3550b-6513b-6513a. This operation seems to be ok unless you have some specific requirements to change.
Changing port channel cost is not a good idea. both the 6500s are using this channel for communication between them. If you block this link, the 6500s will have to communicate thr all the access switches which is not a good design.

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Can't seem to see a clear answer and wondering if something could offer some advice please?
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For a standard trunk port I always add the spanning-tree port type edge trunk to the interface config.
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Thanks!

Hi Paul, there are some parameters you can define on individual ports and there are some of them that will be inherited from the port-channel configuration no matter what has been configured under the infidividual ports. Spanning-tree configuration is one of the inherited ones. As soon as the port joins into a port-channel, it will start to use spanning-tree settings under the port-channel. When it leaves the channel, then it can continue to use the individual configuration.
There is a nice summary here under NX-OS Interface Conf Guide > Port-Channel Conf:
http://www.cisco.com/en/US/docs/switches/datacenter/sw/6_x/nx-os/interfaces/configuration/guide/if_portchannel.html#wp1798338
Evren

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0/1-->C2950-2
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Portfast BPDU Filter Default is disabled
Loopguard Default            is disabled
UplinkFast                   is disabled
BackboneFast                 is disabled
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VLAN0100                     0         0        0         10         10
1 vlan                       0         0        0         10         10
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Building configuration...
Current configuration : 214 bytes
interface FastEthernet0/23
description uplink-rch01-0/1
switchport access vlan 100
switchport mode access
switchport nonegotiate
mls qos trust dscp
auto qos voip trust
macro description cisco-router
end
SW4
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description UPLINK-RCH01-0/2
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Error Messages
Apr 25 17:55:31: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk FastEthernet0/23 VLAN100.
Apr 25 17:55:31: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking FastEthernet0/23 on VLAN0100. Inconsistent port type.

It appears that the ASA is bridging BPDUs. By design, an access interface should not received tagged BPDUs; if it does, it implies that you have a misconfiguration with one side of an interface configured as a trunk and the other side as an access switch port. When this happens, on receipt of the tagged BPDU, the access port is blocked with the error messages that you see in your situation.
I believe the ASA in transparent mode bridges BPDUs silently but I could be wrong. I'm not great with ASAs.
Regards,
Aninda

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Hi,
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</reference>
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Hi gurus,
I have a problem with calling EJBs from a 11.1.1.3 composite. The following summarizes the issue:
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- whenever i try to change the namespace that JDev gives the Reference components I end up with the compilation error:
Source port type for "BPELProcess" does not match target port type for "EJBRef"
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The problem appears to be in the BPELProcess.componentType file.
<reference name="HelloEJBRef" ui:wsdlLocation="HelloEJBRef.wsdl">
<interface.wsdl interface="http://package.workspace.com/HelloEJB#wsdl.interface(HelloEJB)"/>
</reference>
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Thanks,
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Thanks and Regards, Nilesh Thakur.

Thanks Boatseller for help ...
As I already explained that this Port Type was already created (by one of my team member) and deployed.
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ramkis wrote:
Is it possible to access the parallel port in network computer using labview?
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Define "possible". Lots of people ask if something is possible. What you really want to ask is "how difficult is it"? The answer is "yes, it's possible". How difficult? VERY. You cannot directly access it. You have to set up a messaging system between the two computers. Feel like doing that?
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What port type should i use?

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Please help me
what should port type I need to use? Should it be file port or t-rfc port?
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Hi,
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Cheers,
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Hi,
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Hello Experts,
My problem is related to Idoc generation using ABAP Port Type.
In the creation of ABAP Port, one Z function module is assigned which has the code to generate another Idoc(MASTER_IDOC_DISTRIBUTE is used inside).
The problem is, I am able to create the first Idoc using this ABAP Port, and in the status, the first Idoc reached 03 with a message that this Idoc number reached the Zfunction module(which is assigned to port). But I'm unable to see the second Idoc generated. Even I am not sure whether this second Idoc generated or not.
Can you please explain how this ABAP Port type behaves, how to get this function module (which is assigned to port) into debugging mode and help me to solve this.
Regards
Sunil

Hello Radha,
Thankyou very much for your reply.
Even though we keep a break point inside the Function Module it will not come into debugging mode. It needs a different procedure.
I will explain again what my requirement is.
We have a port defined as ABAP Port (Not tRFC and not File Port ). While creating this ABAP Port it never asks for RFC destination, but it asks for a Function Module. So we have given that function module also. ( Basically this Function module creates Idocs using MASTER_IDOC_DISTRIBUTE afetr the original Idoc is created and sent to this port. )
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Now the problem is we are not sure whether the firstly created IDoc (on reaching the port) is triggering this Function module or not. We have checked WE02 if any new Idocs created after the initially created Idoc. But we found nothing. The one we created is the latest.
So can anybody explain how this function module (mandatory to give while creating ABAP port) gets triggered? And how can we get this FM in to debugging mode. Is there any link missing out there while defining ABAP port? Please explain.
Thanks you
Best Regards
Sunil

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Process and initiate operations in port types

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Hi.
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Regards.
Denis

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