Spanning tree question

Similar Questions

• Reference Dell Spanning Tree PowerConnect 2748

  I had just a simple question on Spanning Tree. We have a network configuration and everything is already difficult to implement the tree covering weight on the powerconnect switches if you already have your network configuration is? is it a day all? A lot of configuration? Or just a simple turn on button?

  Sorry, the PowerConnect 27xx switches of the series DO NOT switch support the STP (Spanning Tree) Protocol.

• Spanning tree on C3750 SG300-compatible mode?

  Hi all

  In our computers, we have two C3750 in the stack. The rest of the switches are Cisco SG300 - 28 p.

  What way should I configure so that it is compatible in both models and the model C3750 being root?

  Try to configure the instance 1

  on 3750
  spanning tree mst configuration
  name mymst
  revision 1
  instance 1 vlan 1-4096 [use question mark if the hyphen is not accepted]
  priority of STD 1 spanning tree 4096

  on sg300

  spanning tree mst configuration
  name mymst
  revision 1
  example 1 vlan 1-4096
  priority of STD 1 spanning tree 61440

  Masoud

• Is the spanning tree bpdu filtering on the 5548 "bpdufilter default spanning-tree portfast'

  It seems to me as "the protocols spanning-tree bpdu filtering" on the 5548 the same "spanning-tree portfast default bpdufilter" on the switches of the series N - is that correct?  If this is not the case, what is the equivalent command to 'spanning-tree portfast default bpdufilter?

  Ken

  They lead to the same result, just with a little different method. N-series bpdufilter search all ports configured for portfast and disables the transmission and reception of BPDUS on these interfaces. With the looks of 5548 bpdufiltering for ports with covering weight tree disabled. There is not a command on the 5548 that will search interfaces in portfast mode and filter the BPDU.

• How can I configure Spanning Tree

  Hello

  I have several core Dell passes using PowerConnect 6224 s most - these ink in my Cisco provider kit. We run several VLAN and have redundant links between stacked switches.

  I have read up on top of the tree covering weight and have the following tasks:

  1 map of the network - including the ID of the root bridge, root ports, roads blocked, age max and time of helo

  Once I made my analysis information, I don't know how to better optimize the covering tree config, so far I have:

  1. make sure RSTP is enabled on all switches
  2. make sure that all edge ports have spanning port configured fast shaft
  3. not declare spanning port fast shaft on the links between switches
  4 force speed and duplex settings on all ports to link between the switches (I guess that's because the auto negotiate takes more time?)

  I'm not sure is:
  1 can I use BPDU guard and if so, where?
  2 can I use root guard and if so, where?

  I read the informative article by Todd: http://en.community.dell.com/support-forums/network-switches/f/866/t/19465205.aspx

  But, I don't know where\whether I should to configure the options of guard - am happy to provide additional information as needed.

  Thank you

  Spanning Tree BPDU Guard is used to disable the port where a new device tries to enter the already

  existing STP topology. Thus the devices, which were originally not part of STP, are not allowed to

  influence the STP topology. If the Enable value, when a BPDU is received on a port of the tip, this port is disabled. Once the port has been disabled it requires manual intervention to be reactivated.

  Spanning Tree Root Guard is used to prevent change of the root of a Spanning Tree instance

  in an unexpected way. The priority of an ID of adjustable bridge to zero but another bridge with a low mac ID

  address could also set its priority to zero and take root.

  Both are defined globally on the switch. If you have any possibility of other network devices being plugged into the switch without your knowledge. It may be a good idea to these permits after that STP is configured on the network. That way if someone randomly connected network with STP on this device, it will not throw your network for a loop.

  Here are some good white pages on the tree covering weight

  www.Dell.com/.../app_note_13.pdf

  www.Dell.com/.../app_note_1.pdf

  www.Dell.com/.../pwcnt_MSTP_interoperability.pdf

  Thank you

• Prevent advertising outgoing packets Spanning tree

  Hello

  I have a switch 2960 with a workstation that is connected.

  The switchport is configured for the portfast and the BPDUguard is enabled on the default switch

  When I have wireshark information on the connected pc then I see a lot of STP packets from the switch.

  I would like to disable these messages because the information located in the capture packets can be abused by an attacker who has access to this workstation, for the configuration of protocols spanning-tree of the company information.

  Is it possible to disable the spanning tree information that is sent from the switch?

  concerning

  Jan

  You should be able to configure bpdufilter to stop it. The only problem is that effectively stop you stp on this port, which could be dangerous.

  Understanding of the functioning of PortFast BPDU filtering

  BPDU filtering allows to avoid transmitting BPDUS on active PortFast ports that are connected to an end system.  When you enable PortFast on the switch, protocols spanning tree ports place in State shipping immediately, instead of going through the listening and learning States of transfer.

  By default, the tree covering weight sends BPDUS of all ports PortFast is only enabled or not. BDPU filtering is on a per-switch basis; After you enable BPDU filtering, it applies to all active ports PortFast on the switch.

  HTH,
  John

  Please note all useful messages *.

• SGE2010 switches, VLAN and a port blocked by spanning tree

  People,

  I have 2 groups of switch.

  SGE2010 2 with VLANS is defined as 10,20 and 30

  VLAN 10 is the management VLAN and it uplinks to our border router.

  VLAN 20 is the workstation VLAN, and all workstations are pointing to the switch as their default GW

  VLAN 30 is the ip phone VLANS, and all phones use this as a gateway.

  I have a GAP between the switches said, we have a few servers on the ip phone switch that must be accessed by the clients of the workstation and the unique link of 100 MB through the router probably won't be enough.

  If I understand correctly, because the switches have different networks on them, a simple shift will not work. I did create a gap and addresses on each side, but it does not appear in this mode, I can block vlan 10 transit to the LAG, with this block I'll end with a logic loop and spanning tree will block the uplinks or LAG itself.

  I have attached a picture with a diagram of our current put in place.

  Any help/advice would be much appreciated.

  John, the 802 standard. 1 initial q indicates there isn't only global tree covering weight independently of belonging to a vlan. It's why you run into problems. Cisco has developed PVST to run on circuits of the ISL. BPMH was originally defined as 802. 1s, which is a combination of 802. 1 q + RSTP. The 802. 1s were later modified to become part of the 802. 1 q.

  The person is incorrect, because they cite "because spanning tree is construction by vlan. They are incorrect, because you have to set the properties of tree cover to allow the spanning tree protocols by vlan. Small business switches do not support the owner Cisco PVST and PVST +. However, the SB switches support BPMH which is a standard of the IEEE.

  How works the BPMH, it's that you have called proceeding, i.e. each construction covering tree. Then you have the region, SB switches support only 1 region. The region maintains the instances. Basically how it works, you activate the EMU at the global level. Then, you specify the instance. As an example, the vlan 1 is instance 1. VLAN 2 is 2.  This will allow you to run 2 physical wires between switches vlan different without looping. If you use classic STP or RSTP, the least costly path will go to the State to block/cast who works as expected.

  -Tom

• Problem with a spanning tree Protocol

  Hello

  I have a problem with the spanning tree Protocol, when I connect a printer on C3560E cisco switch. It's the Show Logging:

  * 27 sep 18:57:29.451: % SPANTREE-7-PORTDEL_SUCCESS: GigabitEthernet0/8 removed from Vlan 600
  * 27 sep 18:57:31.976: % SPANTREE-6-PORT_STATE: Port Gi0/8 instance 600 from blocking disabled
  * 27 sep 18:57:31.976: % SPANTREE-6-PORT_STATE: Port Gi0/8 instance 600 from blocking to listening
  * 27 sep 18:57:32.731: % SPANTREE-6-PORT_STATE: Port Gi0/8 instance 600 moving to listen to persons with disabilities
  * 27 sep 18:57:32.731: % SPANTREE-7-PORTDEL_SUCCESS: GigabitEthernet0/8 removed from Vlan 600
  * 27 sep 18:57:35.072: % SPANTREE-6-PORT_STATE: Port Gi0/8 instance 600 from blocking disabled
  * 27 sep 18:57:35.072: % SPANTREE-6-PORT_STATE: Port Gi0/8 instance 600 from blocking to listening
  * 27 sep 18:57:37.068: % LINK-3-UPDOWN: Interface GigabitEthernet0/8, changed State to
  * 27 sep 18:57:38.075: % LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/8, changed State to
   

  This is the configuration of the port, this switch was created L2 of the Vlan:

  See the memory of Vlan:
  
  600 PLT_SERVICE active Gi0/8
   
  Display Port access:
   
  interface GigabitEthernet0/8
  Zebra printer description
  switchport access vlan 600
  switchport mode access
  logging events spanning tree
  event logging status
  end
   
  Trunk Port:
   
  interface GigabitEthernet1/1
  Description box
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1 600
  switchport mode trunk
   

  Please someone help me.

  Kind regards.

  Thank you.

   
   
   
   
   
   
   
   
   
   
   

  Hello

  The port passes all traffic? You can test the printer.

  Thank you

  John

• Spanning tree of routing bridge

  Good day to all

  I have a problem in my network with an old device with a 10mbit half duplex nic - we have switches Powerconnect N3048 in basket - we found that they don't play well with the old device, so we added a 1000/100 old switch to do the translation so to speak.

  The problem now is that STP has not been configured in time and the older switch has taken the role of routing bridge.

  My question is - if I have now set up the N3048 be the bridge on the road, I'll be able to do without affecting the production network traffic, or do I need to down the network to make the change?  Will be the change of the switch N3048 force older to cede control, or they will fight?

  Thanks in advance

  Eric

  By default most of the switches will have a default priority of 32768. In this case, the switches, then use to determine MAC address which is the root device. If this is the case in this scenario, all you have to do is set a less important priority tree covering the desired root switch.

  On your central switch, issue the following command:

  console (config) #spanning 4096 tree priority

  This switch will become the root switch. Should not all switches to be restarted, but will cause a topology of notifications of changes throughout the network, and some ports may change their current status. It depends on the topology.

  I could do this during non peak hours. May also want to check the switch that you added to the network and make sure that it doesn't have a priority tree covering of 4096. If this is the case, set it to something higher.

• SPAN port question

  Our security guys wants to snort installation on a Linux box with a SPAN port to capture all traffic network (not just traffic VM). What are my options? I think I should do VMDirectPath for a 1 GB integrated network interface and turn it into a SPAN port for the virtual machine. Is there another approach, I'm missing?

  Snort will be on a VM with RHEL. I try to avoid using physical blade assets simply because we need a SPAN port. I think that my best course of action will be to use DirectPath to the network card of the snap in a virtual machine.

• The tree question

  Request Express 4.1.0.00.32
  
  I created a tree using the following query:
  
  Select case when connect_by_isleaf = 1 then 0
  When level = 1 then 1
  of another-1
  end the status,
  level,
  MAJR_DESC as title,
  NULL as an icon,
  MAJR_CODE as value,
  majr_desc as ToolTip,
  ' f ? p = & APP_ID.:2: & SESSION. : NO::P2_MAJOR:' | MAJR_CODE link
  of ' #OWNER # '. " WLMAJORS ".
  Start with 'COLL_CODE' is null
  connect prior 'MAJR_CODE' = 'PARENT '.
  siblings arrested by "MAJR_DESC".
  
  The tree seems to work fine, but I have a little problem. The tree lists the six colleges at my University. When you click on a college to decompress, it shows the different "majors" of the order. By clicking on any of these majors then load of information that major in various parts on the same page that contains the tree. In the tree, Arts & Communication is the first college. If I develop a college, say Liberal Arts and choose a major, say that English journal, Arts and Communication develops as well. The first sheet (Arts & Communication) grows every time that the page is. I don't want to do. The single sheet should be extended is the College that contains the key that I consult.
  
  None of this has meaning to anyone else than me? Any help is greatly appreciated.
  
  Bob

  Hello Bob,

  Give a few static id for the region of the tree, for example tree-reg-static-id (make sure model respective has the substitution for #REGION_STATIC_ID string #)

  And after the code to run when the page load section of your page @ apex.oracle.com

  if ($("#P1_MAJOR").val())
  {
  var firstNodeChild = $("#tree-reg-static-id li:first").find("li#"+$("#P1_MAJOR").val()).size();
  if( firstNodeChild == 0 )
  $("#tree-reg-static-id li:first").removeClass("open").addClass("closed");
  }
  else
  $("#tree-reg-static-id li:first").removeClass("open").addClass("closed");
  

  That should do the trick.

  However, I consider this a BUG!

  Kind regards
  Hari

• Properties-> Flex tree question Applications

  Right-click on the properties of a project, go to flex applications.

  FX3, only branches shown for my project are the ones with the real application (mxml) files

  In Fb4, it shows all my directories in my project and my applications are in the last subdirectory. But because I have 10 other subdirectories and probably more then 10 directories etc, the tree made my scroll bar about 1 1/5. ((1) there is no collapse all close this tree nasty 2) why it collapsed so all branches are closed, but only branches that appear are those with the mxml files does not start? It's super annoying to scroll down, see what application is selected, scroll to the add, then scroll down to select that I have added, and then scroll to the top to set the default value.

  Just start this view with the tree collapsed or expose branches that contain only mxml files.

  This forum is for the SDK. Issues specific to the IDE interface belong to its dedicated forum.

• Property selectedItem tree question

  Hi all

  After setting the dataprovider for the tree, I browsed the dataprovider of the tree and selected a particular tree by using the tree.selectedItem property node. But a problem of stack trace mentioned below during the launch of the tree and execution.

  

  You might want to try a later version of 3.x.  Otherwise, you will need to

  debugging in and see what assumptions does the code.

• UpdateDisplayList tree question

  Hi, I am facing after publication.
  
  I use a tree related to an xmllistcollection. I apply a filter funtion to this collection, but the elements are just updated to the tree by expanding or collapsing branches.
  
  I already tried to use invalidateDisplayList... or validateDisplayList... but it was unsuccsessful.
  
  Does anyone have an idea?
  
  Thank you
  Peter

  treeListagem.invalidateList ();

  Does the work!

• Recursive tree question

  Hello!
  
  I made a display with gites SEO link display object, relinquished control of the data on the page, added a rule, selected attributes.
  It works fine, but the tree displays all rows of the tablefirst, because the tree uses a unique view object and query does not limit data because if I limit to select only records of root, children are seen, of course. How to build a recursive tree, while it would initially only the records of root on top?
  
  Thank you!

  Yes, 1 view object can create a tree model. First of all on the data model for the App Module will be one with ViewCriteria and her child, using the ViewLink you defined for himself, without a viewcriteria.