Spanning tree of routing bridge

Similar Questions

• Spanning tree question

  I have a stack of 4 switches PowerConnect 7048 core. There are unacceptable delays on the network so I'm cleaning configurations and verification spanning tree as these have been set up by he previous admin. The four active links of 10 GB, the spanning tree different reports States:

  two are

  Te3/2/1 port active
  Status: Disabled role: disabled
  Identification of the port: 128.167 shipping: 0
  Fast port: no Protection from root: No.
  Designated the bridge priority: 4096 address: 5C26.0AAA.1EA6
  Identification of the designated port: 0.0 cost of access road designated: 0
  Root regional CSE: 80:00:5 C: 26:0 A: AA:1E:A6 CST Port cost: 0
  Root Guard..................................... FAKE
  Loop Guard..................................... FAKE
  TCN Guard...................................... FAKE
  Portfast auto... TRUE

  and two are

  Te2/2/2 port enabled
  State: Forwarding role: designated
  Identification of the port: 128.112 shipping: 2000
  Fast port: no Protection from root: No.
  Designated the bridge priority: 4096 address: 5C26.0AAA.1EA6
  Identification of the designated port: 128.112 cost of access road designated: 0
  Root regional CSE: 10:00:5: 26:0 A: AA:1E:A6 CST Port cost: 0
  Root Guard..................................... FAKE
  Loop Guard..................................... FAKE
  TCN Guard...................................... FAKE
  Portfast auto... TRUE

  . I think the first one indicates a problem and all must be reported as the redirection and designated. Is that correct and if so, how can this be done?

  Thank you

  Hello

  Does not serve a disabled state. If you do not disable spanning tree, it should allow. http://downloads.Dell.com/manuals/all-products/esuprt_ser_stor_net/esuprt_networking/esuprt_net_fxd_prt_swtchs/PowerConnect-7024_Reference%20Guide_en-us.PDF page 745

• 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

• 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

• 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.

• 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.

• 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 *.

• 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

• 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

• Linksys - router bridge - E8350 path not found network

  Dear community of Linksys,

  I recently bought a Linksys E8350 router, to replace the old AP in my network domestic.

  To make the installer of my clear network, I did a little diagram:

  

  So, as you can see, at the top left is the router/modem provided by my internet provider (Telenet, Belgium).

  I have a wired connection in my room, where I have my desktop and NAS connected computer. I also plugged the

  Linksys E8350 that is configured in Bridge mode. My laptop is connected wireless to the E8350.

  On the E8350, I disabled DHCP and NAT and gave him a static IP outside the range of my other router.

  My problem:

  When I go to the network through windows file Explorer, I can see my desktop from my laptop and vice versa.

  But when I double click to access one of them, I get the error message "network path not found".

  Connection via start > \\Computer-name gives the same error.

  Since my laptop or my desktop, I can see my NAS on the network. I have internet on all my devices:

  My office through internet cable connection, my laptop has wireless internet connection trough

  and I can evaluate my NAS from the internet.

  When I remove the E8350 entirely from my network and connect my laptop a hollow wired connection.

  everything works fine. I can see all the devices on the network, connect to my NAS and share files between computers.

  Things I tried already:

  -My PC and laptop are both in a 'private network '.

  -J' disabled my firewall

  -Everything is activated in the menu "sharing advanced settings."

  -J' tried to connect the E8350 to the switch via the Ethernet or WLAN port, nor to solve the problem

  -J' tried to change the NETBIOS settings

  -I don't have your antivirus software that might interfere with something

  -J' updated the firmware on my linksys router to the latest version

  To be clear, the problem occurs when I put the E8350 in my network, otherwise everything works perfectly.

  I hope that I have provided some information decent on my problem, because I can't seem to figure it out myself.

  Thank you in advance.

  Pindox

  The topology of your network is effective from your diagram. With the E8350 in mode bridge in this topology is WAN is connected to the network switch.

  Many devices of bridge no hand NetBios address very well. In some cases, the best way to access the network through a bridge device resources is to use remote devices IP address instead of its computer\device network name.

  In Windows, you can drive old school card NAS records using the IP address of the Servers\NAS:

  PC command line:

  NET use s: \\192.168.0.3\my_nas_folder / persistent: Yes

• Spanning tree Distribution Switch Port is root for all the VLANS

  Hello world.

  Uplink to switch on 2 layer network flat if Distribution change a.

  This distribution uplink port is Root Port.

  Core switch port goes to the Distribution switch appears as State PLEASE FWD.

  It will cause slow for users who are connected to the network on the Distribution switch?

  According to my understanding core should be Root STP for all the right of VLAN?

  If necessary how can I make kernel as root port switch port?

  Thank you

  MAhesh

  Hello

  a root is a designated port (if shipping port) on a non-root bridgewhich a path root the lowest cost to the root bridge. So there is nothing unusual here, and your kernel needs to be done to root bridge if you run STP between distribution and kernel as you apparently.

  Kind regards.

  Alain

  Remember messages useful rate.

• SG100-24 Spanning Tree Protocol compatible?

  How the SG100-24 switch treats the STP Protocol?

  Hi Steve,.

  It will transmit messages to other participants STP BPDUS. Does not generate its own so you must be careful when adding to the network because it doesn't have a loop prevention mechanism.

  Kind regards

  Aleksandra

• migration 6509e 7009

  We are migrating from a 6509e to Nexus 7 k. In the design we will be refreshing the IP addressing infrastructure and VLANs. My goal is to have two switches are running side by side until the migration is complete.

  Currently a single 6509 is my heart, creation of the VTP domain and root bridge. We install a unique 7K with the new IP addressing scheme and VLAN again. I want to go to the DERIVATIVE and root, bridge above the 7K, but I'm wanting to know if it is possible to do the migration without any effect on the current infrastructure.

  1 would be there any detrimental effect of disabling VTP on the 6509 and then implement the VTP on the 7 K field?

  2 should there be concerns about protocols spanning-tree with root bridge passage to the 7 K?

  Additional information:

  Old IP address is 172.25.x.x

  The new IP address is 10.x.x.x

  VLAN old will be inplay until the migration is complete

  New VLAN is completely different from the old numbering. no overlap.

  Thanks for the tips or thoughts.

  Dave

  Hi Dave,.

  If you use the same VLAN or some of them, then it is better to have a trunk between N7K and Cat65k

  allow only the vlan shared between them that will be migrated, continue the 65K as the root, once everything is in place do the N7K as root

  Since this is the only box it is easier that you do not use any HSRP, in this case

  also it is a good document of Cisco.com on migration QoS of 65 K N7K you could read for more information

  Keep VTP transparent on both

  hope this helps

• How can I determine if my router is able to bridge Mode

  I have a linksys router WRT 54G I want to have the ability to Bridge Mode. How can I determine if this router has this ability.

  Linksys Article ID: 24583 details the procedure to develop a device that is able bridge in bridge mode, but which numbered ports on the router bridge Mode access.

  Thanks for any help.

  Linksys WRT firmware does not support bridge mode. You will need to use a 3rd party such as DD - WRT firmware.

• Bridges 2 1552 for high availability using

  Switches: 3560

  routers: 2811

  AP: 1552e

  We have 4 1552 AP we would like for installation in a point-to-point environment. Currently, they are light but would make us independent for this scenario, unless there is a feature in the controller that would achieve what it takes I don't know.

  We would like to implement in pairs on each side with the 1st goal consisting of high-availability so if one goes down there is still connectivity. Our second objective would be to use the two AP for higher bandwidth.

  I thought I'd try to configure a port channel, but as I read it, you can't do it, but I would like to know if I'm wrong. I saw where someone else tried to do the same thing in the forums and there were some responses, but the links do not work for me.

  http://www.Cisco.com/en/us/partner/products/HW/wireless/ps5279/products_tech_note09186a0080736199.shtml<----- doesn't="" work="" for="">

  Just look at showing up in the best possible direction. It seems that routing should take care of what we need, but would like to see if there are any other avenues.

  Thanks in advance.

  The best thing you can do is to configure each P2P connection as a trunk and use priority of vlan spanning tree in order to balance traffic between the two links.  You can't really bundle, because the bridge that sends the traffic expected for the traffic to come back through it.  It's the best way to use the two bridges, this is how it has been done in the past and how its still quite well done.

  Thank you

  Scott

  Help others by using the rating system and marking answers questions as 'response '.