Set Up of Backup Root Bridge (for resilience purpose)

Hi,
I've a wireless link with 2 Aironet 1240, one as Root Bridge connected to backbone network, the other one as Non Root Bridge.
I would like to setup another Aironet 1240 as Root Bridge with backbone network connection for resilience purpose, any special parameters need to be taken care of?
Will I need to configure the 'Root Parent Timeout Value' & 'Root Parent MAC'?
Thanks.

Yes you can configure parent in this and you are right.. Configure parent with the MAC address.. your Parent Number will decide which one is promary and which one is backup..
Example..
parent 1 1111.1111.1111
parent 2 3333.3333.3333
In this case.. the Non Root will try to associate to Parent 1 , if this fails then this goes to parent 2..
Lemme know if htis answered your question
Regards
Surendra

Similar Messages

  • Anyway to have Hot-Standby Root Bridge for Autonomous AP1242

    Is there anyway to have or configure a Hot-Standby Root Bridge for Autonomous AP1242?
    My purpose of hahving this is to have a more resilience in case the Active Root Bridge is faulty on the backhaul side.
    In order to have more resilience backhaul for the backhaul bridging part, my thinking is to configure the Non Root bridges as WGB infrastructure mode and Root Bridges as AP.
    Any suggestions are welcome :)

    When you set up the standby access point, you must enter the MAC address of the access point that the standby unit will monitor. Record the MAC address of the monitored access point before you configure the standby access point.
    The standby access point also must duplicate several key settings on the monitored access point. These settings are:
    • Primary SSID (as well as additional SSIDs configured on the monitored access point)
    • Default IP Subnet Mask
    • Default Gateway
    • Data rates
    • WEP settings
    • Authentication types and authentication servers
    Check the monitored access point and record these settings before you set up the standby access point.
    I hope it may help you.

  • Multiple Root Bridges for VLAN1

    Greetings,
    I have an interesting problem with my switch environment. I have (2) 3550s acting as my distribution layer (labeled d1 and d2) and (3) 3548s acting at my access layer (labeled a1, a2 and a3). Each access switch has a single dot1q trunk link to 1 of the distribution switches (a1 and a3 link via gig-E to d1; a2 links via gig-E to d2). d1 and d2 have a single dot1q trunk link and a single routed link between them.
    Currently, I am having an issue with VLAN1 on a few different levels.
    Interface VLAN 1 is configured for HSRP on d1 and d2, with d2 being primary for HSRP and also it should be the root bridge for VLAN 1 (spanning-tree vlan 1 pri 4096).
    First and most obvious to me when I first started looking at this problem (I recently started working at this company) is the the layer3 interface for VLAN 1 on d1 is showing down/down, even though there are trunk ports carrying VLAN 1 ok. I cannot see a reason the VLAN interface should be down/down. I have tried shutting and no shutting the interface with no luck.
    The second problem is there are 4 switches (d1, d2, a1 and a3, recall both a1 and a3 have single dot1q trunks to d1) that all think they are the root bridge for VLAN1 even though I have the spanning-tree priority on d1 set lower to be root bridge. According to d1 spanning-tree, all the ports are in "DWN" status:
    Interface Role Sts Cost Prio.Nbr Type
    Gi0/7 Desg DWN 4 128.7 P2p
    Gi0/9 Desg DWN 4 128.9 P2p
    Gi0/10 Desg DWN 4 128.10 P2p
    Gi0/12 Desg DWN 4 128.12 P2p
    The weird part to me is that I have ~25 VLANs configured over these trunks and the rest of them don't have a problem with finding the correct root bridge.
    Has anyone seen such oddness when it comes to root bridge election or the problem with VLAN 1 being down? Perhaps some advice on what else to look for in the configs?
    Thanks for any information.
    -jflaherty

    Thanks for the reply. I see VLAN 1 being trunked and allowed from both sides on multiple links, d1 to d2 and d1 to a3, so I would think the autostate would see this and have VLAN 1 on d1 UP/UP.
    d1 - g0/12 (link to d2)
    Port Vlans in spanning tree forwarding state and not pruned
    Gi0/12 1,10-11,13-15,19-23,26,40-41,43-50,52-57,100-101
    d2 - g0/12 (link to d1)
    Port Vlans in spanning tree forwarding state and not pruned
    Gi0/12 1,10-11,13-15,19-23,26,40-41,43-50,52-57,100-101
    And finally, a3 - g0/1 (link to d1):
    Trunking VLANs Active: 1,2,5-8,20,26,44-46,48,53

  • Root bridge for VLAN 1

    If I have 2 core Layer 3 switches that are in an HSRP config, each of the active router vlans are setup already as the root bridge for those particular vlans, who should I designate as the root bridge for VLAN 1 ?

    Root bridge and the active router in hsrp are not really related.
    Root bridge selection is only used to control which paths are blocked if any. The actual path of the traffic does not have to pass via the root bridge. It will always take the most direct path between the machines.
    It is much more important to see where the blocked link is if you have any.
    As a example you have a distribution switch connected to your 2 core switches and the 2 core switches connected to each other. You design you spanning tree to block the link between the 2 core switches by setting the cost very high. In this case any machine on the distribution switch can directly access either core switch. Since only the core switch that is the active HSRP router for a vlan will advertise the common mac address the distribution switch will only see the mac address on one of the two links. Either core switch can be set as the root but the traffic will alway directly flow to the active HSRP device.
    Of course you don't want to block the line between the switches because the HSRP keepalive message will be layer 2 routed via the distribution switch. In a very simple design it is common to have the root bridge be the HSRP active device just because its easier to configure but the concepts are not really related. Root bridge placement is more related to traffic volumes than anything else it just tends to be true that the switch has the gateway is also the highest volume of traffic

  • Wont backup (Sony Bridge for Mac - Xperia z3 Compact)

    Sounds weird yet I had the same issue for months. Now ive updated the software on the phone and ....make sure that your phone is unlocked when plugged into the PC..when its unlocked it recognises the phone and backup works...just worth retrying.

     The headphone jack?  What if you uninstall and reinstall Bridge   PC Companion (PCC)  Bridge (for Mac)   Alternatives on How to backup Xperias http://talk.sonymobile.com/thread/36355 

  • Need to reboot root bridge for RF connectivity

    We have installed RF connectivity with Cisco Aironet 1300 between two sites.The distance is 1 km.
    The connectivity is intermittent and shows radio errors in logs.
    After rebooting the root bridge at one site the connectivity is restored.
    We have not been able to locate the problem . Plz Help
    the configs are as below :
    Site 1 :
    ROOT BRIDGE
    ip subnet-zero
    aaa new-model
    aaa group server radius rad_eap
    aaa group server radius rad_mac
    aaa group server radius rad_acct
    aaa group server radius rad_admin
    cache expiry 1
    cache authorization profile admin_cache
    cache authentication profile admin_cache
    aaa group server tacacs+ tac_admin
    cache expiry 1
    cache authorization profile admin_cache
    cache authentication profile admin_cache
    aaa group server radius rad_pmip
    aaa group server radius dummy
    aaa authentication login eap_methods group rad_eap
    aaa authentication login mac_methods local
    aaa authorization exec default local
    aaa accounting network acct_methods start-stop group rad_acct
    aaa cache profile admin_cache
    all
    aaa session-id common
    dot11 activity-timeout client default 99999
    dot11 activity-timeout repeater default 99999
    dot11 activity-timeout workgroup-bridge default 99999
    dot11 activity-timeout bridge default 99999
    dot11 ssid yyyy
    authentication open
    dot11 network-map
    bridge irb
    interface Dot11Radio0
    bandwidth inherit
    no ip address
    no ip route-cache
    ssid yyyy
    speed basic-1.0 basic-2.0 5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
    no preamble-short
    station-role root bridge
    cca 75
    concatenation
    distance 2
    antenna gain 14
    infrastructure-client
    bridge-group 1
    bridge-group 1 port-protected
    bridge-group 1 spanning-disabled
    interface FastEthernet0
    no ip address
    no ip route-cache
    full-duplex
    bridge-group 1
    bridge-group 1 spanning-disabled
    interface BVI1
    ip address 10.1.254.252 255.255.255.248
    no ip route-cache
    ip default-gateway 10.1.254.249
    ip http server
    no ip http secure-server
    ip radius source-interface BVI1
    radius-server attribute 32 include-in-access-req format %h
    radius-server vsa send accounting
    control-plane
    bridge 1 route ip
    Site 2 :
    aaa new-model
    aaa group server radius rad_eap
    aaa group server radius rad_mac
    aaa group server radius rad_acct
    aaa group server radius rad_admin
    aaa group server tacacs+ tac_admin
    aaa group server radius rad_pmip
    aaa group server radius dummy
    aaa authentication login eap_methods group rad_eap
    aaa authentication login mac_methods local
    aaa authorization exec default local
    aaa accounting network acct_methods start-stop group rad_acct
    aaa session-id common
    dot11 activity-timeout client default 99999
    dot11 activity-timeout repeater default 99999
    dot11 activity-timeout workgroup-bridge default 99999
    dot11 activity-timeout bridge default 99999
    dot11 ssid yyyy
    authentication open
    infrastructure-ssid
    bridge irb
    interface Dot11Radio0
    bandwidth inherit
    no ip address
    no ip route-cache
    ssid yyyy
    short-slot-time
    cca 75
    concatenation
    speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
    station-role workgroup-bridge
    antenna gain 14
    keepalive 9999
    infrastructure-client
    bridge-group 1
    bridge-group 1 port-protected
    bridge-group 1 spanning-disabled
    interface FastEthernet0
    no ip address
    no ip route-cache
    bridge-group 1
    bridge-group 1 spanning-disabled
    interface BVI1
    ip address 10.1.254.253 255.255.255.248
    no ip route-cache
    ip default-gateway 10.1.254.249
    ip http server
    no ip http secure-server
    ip radius source-interface BVI1
    radius-server attribute 32 include-in-access-req format %h
    radius-server vsa send accounting
    control-plane
    bridge 1 route ip

    Hi Sanjay,
    Nothing is jumping out from the config all seems fairly standard. Points more to an RF problem.
    Can you post the error logs/messages from the radios.
    How much clearence above obstacles do you have between the link? At that distance on 2.4GHz there should be around 6m free space.
    What antennas are you using? Have you performed a spectrum analysis at either end of the link to determine potential interference on the channel used?
    From each end could run the following command and post the output:
    show dot11 stat cli
    show dot11 carrier busy
    Thanks
    Mat

  • Want to set up my server at home for simple purposes.

    Hi,
    I am an IT student and recently took a course in Windows Servers in which we were to over the duration of the course setup and configure a server using Windows Server 2008 R2 Enterprise.
    I was so excited to get to work with this kind of stuff that I went straight to ebay and bought a used Dell 1U CS24-SC JSD2  with two Quad core Xeon L5420 2.5GHz 12MB L2 Cache 1333Mhz processors, Dell S45 Mother board on intel 5100/ICH9R chipset with
    ASPEED AST2000 onboard graphics and 8GB PC2-5300P Ram and two 250GB 7.2K SATA drives with an additinal two blank caddies to fill.
    I have run the gauntlet setting it up as a double for the machine I am supposed to be configuring in the lab at school, just to make sure I could do the classroom exercises efficiently. Now that I am done with the course, I would like to put this beast to
    work as place to experiment with building web sites, as a source for media and data from remote access. I will soon be taking courses some 40 plus miles from the house which is a bugger of a turn around time of I forget a flash drive. So remote access would
    be nice, and to be able to host media throughout my home network consisting of two IMac's, two IPad Air's an MSI netbook running linux Ubuntu and a Dell notebook pc running Windows7  as well as two Apple Tv's.
    One of my biggest things is this: I know when setting up the class machine I was required to setup Active Directory Domain Services. Since essentially the Server and the Dell notebook are the only Windows devices on the network, is it necessary to run Active
    Directory Domain services to be able to use web server and provide a remote connection? It would be nice to either run a protected site that I can access my data files for school that I built myself, or be able to remote connect to the server and access from
    the web at school.
    If I am not mistaken, because of the proprietary nature of both the Windows Software and the Mac OS's, those devices will not communicate properly, also because of the same thing, the linux netbook is probably out of the question because neither Windows
    or Mac play well with Linux and the Apple Tv's are just dumb terminals.
    I admit I am extremely new and dying to learn more. Any help would be greatly appreciated!!

    From what I understand you want to build websites and connect to your server remotely... totally possible.  Active directory isn't a requirement for any of that (but you can do it anyways).
    Since essentially the Server and the Dell notebook are the only Windows devices on the network, is it necessary to run Active Directory Domain services to be able to use web server and provide a remote connection?
    No.  As Rhys mentioned you dont need Active Directory to connect to your home server (or home computer).  To do this you can open and forward ports from the router connected to your modem to your home computer.  The port depends on the software
    that you use, like you found 3389 is for Windows Remote Desktop.  There are other tools to do a similar task and may support multiple operating systems, such as VNC.
    It would be nice to either run a protected site that I can access my data files for school that I built myself
    You can do this.  Again, active directory isn't needed.  On your server install the IIS role.  Then allow port 80 on your router to your server.  Make sure your server is kept up to date with patches, antivirus wouldnt help (MS has a
    free one i think for 2008), etc etc.  Then you start building your own sites.
    Well.. openning port 80 on your router if you want people (including yourself) outside your home to access the site.  I'd get it working internally first, then subject yourself to the attacks of the world :)
    Happy coding

  • Non-root bridges associating with each other.

    We have a point to multi-point bridge setup with 3 BR1310s. One is set to be a root bridge and the other two are set to be non-root bridges. From past experience (not to mention Cisco documentation) I would expect the 2 non-roots to associate to the root. What is happening is that one of the non-roots associates with the root and the other non-root associates with the first non-root. The good bit is that everything still works, the puzzling bit is why this is happening, the bridges are physically in a V pattern so there's no reason for the second non-root to behave as it is, even if we force it off the first non-root it just jumps right back in there again. Bridges are all running 12.3.4-JA.

    Configurations of both non-root bridges attached. I've just found out that the customer has mounted the second non-root bridge in such a way that there is probably no line of site to the root bridge (failing to follow clear instructions!) which explains why we can't get it to associate with the root bridge but doesn't explain how it can associate with the other non-root. The only thing I can think of is that both are "non-root with clients" and the second bridge is being accepted as a client rather than a bridge.

  • Mutiple spanning-tree root bridges

    We've started installing some new 3650 switches (replacing 3560's at the access layer) running XE 03.03.05SE. We've run into some problems as a result of "ip device tracking" being on by default, but in the process of debugging I've found that three separate switches all believe they are the spanning-tree root bridge for the same VLANs. The new switches are by default in rapid-pvst mode; the distribution switches are set to rapid-pvst as well. All 3650's are dual-homed.
    SW1#sh span vlan 999
    VLAN0999
      Spanning tree enabled protocol rstp
      Root ID    Priority    33767
                 Address     78da.6e6f.6d00
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
      Bridge ID  Priority    33767  (priority 32768 sys-id-ext 999)
                 Address     78da.6e6f.6d00
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time  300 sec
    Interface           Role Sts Cost      Prio.Nbr Type
    Gi1/1/4             Desg FWD 4         128.52   P2p
    Gi2/1/4             Desg FWD 4         128.116  P2p
    SW2#sh span vlan 999
    VLAN0999
      Spanning tree enabled protocol rstp
      Root ID    Priority    33767
                 Address     f40f.1b84.9680
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
      Bridge ID  Priority    33767  (priority 32768 sys-id-ext 999)
                 Address     f40f.1b84.9680
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time  300 sec
    Interface           Role Sts Cost      Prio.Nbr Type
    Gi1/1/3             Desg FWD 4         128.51   P2p
    Gi1/1/4             Desg FWD 4         128.52   P2p
    SW3#sh span vlan 999
    VLAN0999
      Spanning tree enabled protocol rstp
      Root ID    Priority    33767
                 Address     78da.6e6f.7180
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
      Bridge ID  Priority    33767  (priority 32768 sys-id-ext 999)
                 Address     78da.6e6f.7180
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
                 Aging Time  300 sec
    Interface           Role Sts Cost      Prio.Nbr Type
    Gi1/1/3             Desg FWD 4         128.51   P2p
    Gi2/1/4             Desg FWD 4         128.116  P2p
    Switch 1 seems to behave as if it is the real root, but this still does not make much sense to me. Does anyone have an explanation? It's been a long time since my switching class, and I very seldom have to deal with spanning-tree issues.

    Hi,
    Having more than one root switch for a VLAN is definitely a sign of some foul play. A contiguous VLAN can never have more than one root switch. Multiple root switches would occur if, for example, the trunks interconnecting the switches had this VLAN excluded from the list of allowed VLANs, or if they were interconnected by access ports (in a different VLAN) rather than trunks. Another possibility could be an inappropriately constructed MAC ACL or VLAN ACL inadvertently block BPDUs. In any case, this may be a source of serious trouble.
    Without further information about your network, it is difficult to suggest anything more specific. Would it be possible to post a diagram explaining your network topology? Also, would it be possible to post the show span root and show span bridge outputs from every switch in your network?
    Thank you!
    Best regards,
    Peter

  • Using libraries vs. Bridge for graphics in placeholder frames

    Hi,
    I do not understand the advantanges of using libraries vs. Bridge for my purpose:
    Purpose:
    I am working with templates using graphic placeholder frames. The frames are anchored in table cells and have object styles applied defining e.g. the placement of the graphic within the graphic frame.
    I want to set up central graphic library for all graphics used in all my documents.
    The graphics should then be linked into the documents
    Idea:
    set up various InDesign libraries and then drag the graphics into the placeholder frames. Then, when the graphic needs to be changed, do the changes in the library and have all my documents updated at once.
    Problem:
    Dragging graphics from the library into the placeholder frames does not seem to work. They are simply placed onto the page and NOT in the graphic frame. On the other hand when I simply store the graphics in various subdirectories in my file system and drag the graphics onto the page using Adobe Bridge, they ARE placed in the graphic placeholder frames.
    The library therefore seems a disadvantage, so why should I use a library instead of the Bridge?
    Also, will be upgrading to CS5 soon an want to use the live-linking caption feature. Should I use libraries or the Bridge approach?
    Stumped on this issue

    I like the idea with the snippet, but when dragging a snippet from Bridge there is still the same problem as with the library item: The graphic is NOT placed into the graphic placeholder frame of my template but is a free-flowing new graphic item which has to be placed manually.
    Interestingly, a JPG-file simply saved in the filesystem and dragged from Bridge and dropped over the placeholder frame WILL place the JPG into the frame!
    Why won't snippets do this??

  • How to find out Secondary STP Root bridge in cisco switche network

    Hi, i need to find out Root Primary and Root Secondary bridge in all my offices.
    sh spanning-tree summary command can tell me which switch is root bridge primary, but how can i find secondary root easily with some simple command?
    sh spanning-tree summary
    Switch is in pvst mode
    Root bridge for: VLAN0001-VLAN0002, VLAN0005, VLAN0008, VLAN0031

    I'm not sure if there is a simple way of finding the bridge with the SECOND best priority.

  • Two root bridge in same network

    Dear Team,
    As I checked, there are two root bridge in the same LAN.
    We have 6500 which is manually configured as root bridge and this is showing root for all the vlans in the network. Once switch connected to 6500 through 4500 is showing root for the vlans that not assigned to any of the port. Please help to clear it.
    Setup
    Cisco 6500 -- Cisco 4500 -- Cisco3560 -- Cisco 3560
    Cisco 6500
    CORE_SW#show spanning-tree root detail
    VLAN0001
      Root ID    Priority    24577
                 Address     0025.84d9.ac80
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
    VLAN0002
      Root ID    Priority    24578
                 Address     0025.84d9.ac80
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
    Cisco 3560 Second
    Access#show spanning-tree root de
    VLAN0001
      Root ID    Priority    24577
                 Address     0025.84d9.ac80
                 Cost        16
                 Port        28 (GigabitEthernet0/4)
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
    VLAN0002
      Root ID    Priority    32770
                 Address     000a.b8ff.be00
                 This bridge is the root
                 Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
    Here, I have not assigned any port in vlan 2 and this is showing root bridge for vlan 2. In which cases such thing can happen?
    Thank You,
    Abhisar.

    By default, Cisco switches run one spanning tree instance per VLAN and negotiate the topology with other connected switches. If your 3560 believes it is the root for VLAN 2 and there are no ports using VLAN 2, it will consider itself the to be the root because it hasn't been able to negotiate a topology for this VLAN with any other devices. This is normal. Once ports are connected to VLAN 2 and the 3560 can talk to the other switches, the spanning tree will be renegotiated and should behave as you expect.
    If you want to have a single spanning tree topology for all VLANs and avoid this behaviour, consider moving to a single-instance MSTP configuration.

  • 1310 Root Bridge will not Authenticate with 350 Non Root Bridge

    I've exhausted myself solving this issue.
    I have a 1310 set as a root bridge using WEPS. I have a 350 set as a non root bridge/without clients, also using WEPS (they both use the same SSID)
    The 350 will not authenticate to the 1310. After doing a Carrier Busy Test, it is clear the 350 see's the 1310 with signal strengh of 100 percent.
    (I have a test lab setup in my office)
    If I make the 350 the Root Bridge and the 1310 the Non Root, The 1310 will authenticate to the 350.
    I hoping someone else has seen this problem and can enlighten me.
    Thank you.

    I have successfully configured a 1310 Bridge as a Root Bridge and a BR350 Bridge and a Non Root Bridge/with Clients. I also had to force the 1310 to operate at 11MB only.
    As soon as I make the BR350 Bridge a Non Root Bridge/without Clients, the authentication is dropped between the two.
    I was hoping I could transition to the 1310 one unit at a time since I have over a dozen 350's to replace.

  • Moving spanning tree root bridge

    Hello everybody,
    I have a lot of vlans trunkated to one link(trunk). If I move root bridge for 1 vlan, do i have impact(recalculating) to all vlans in this trunk or only for this one.
    Thanks!

    do i have impact(recalculating) to all vlans in this trunk or only for this one??????

  • AIR 1242AG Root Bridge Radio

    Hi,
    Can the radio of the AIronet 1242-AG in root bridge mode shut down itself when the Ethernet link is down like in AP mode (
    station role root access point fallback track d0 shutdown )?
    I've 2 AIR 1242-AG as root bridge for connecting a few 1242-AG as non-root bridge, in case the ethernet of the root bridge is down, the non root bridge connected to it will lost its connection to the backbone network. If the root bridge radio can shutdown automatically, the non root bridge can associate to the other root bridge, then the backbone network.
    Thanks.

    Hi,
    According to the CLI on-line help (listed below), the station-role root fallback configure the 'Root AP action if Ethernet port fails'. Would like to know if it also support Root Bridge mode such that the radio will be shut down when the Ethernet fails?
    As I don't have a pair of 1242 on hand, I cannot test it out.
    Please help. Thank you.
    AP-1242(config-if)#station ?
      non-root          Non-root (bridge)
      repeater          Repeater access point
      root              Root access point or bridge
      scanner           Scanner access point
      workgroup-bridge  Workgroup Bridge
    AP1242(config-if)#station root ?
      access-point  Access point
      ap-only       Bridge root in access point only mode
      bridge        Bridge root (without wireless client)
      fallback      Root AP action if Ethernet port fails    <<<<<<<<<  Is Root Bridge mode supported?
    AP1242(config-if)#station root fallback ?
      repeater  Become a repeater
      shutdown  Shutdown the radio

Maybe you are looking for