Network Design - Root and Non root bridges

Hi,
We have a network set-up as the below image. Where the switches have STP enable to handle the muliple paths for the data to flow.
What I would like to know is should the 2 bridges plugged into the same switch e.g Switch A (Bridge A and Bridge B) both be root bridges and (Bridge C and Bridge D) both be non root.
Or should for example, Bridge A be a root and Bridge C a non root and Bridge B a non root and Bridge D the root?
Similarly with the rest of the other bridges E, F, G and H
Thanks

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Ah, I think I understand. So the wireless bridges are "transparent" to the rest of the network. They just convert wired to wireless and back again.
If I have that right, we can ignore them and just consider your switches.
In that case, it appears you have two L2 loops, those formed by the dual paths between switches A and B and between switches C and D. From a topology standpoint, it doesn't seem to matter what switch you select as root and secondary root. However, as switches B and C are the interior switches, I would suggest those as your root and secondary root switches.

Similar Messages

1242 as Root and Non Root

Hi Everyone,
I am setting up pair of 1242 APs as Root and Non-Root bridge, i am not able to find the Install Mode on the 1242 AP while setting the Non Root for Best signal.
any help will be appreciated.
HM

Hi HM,
AFAIK, we do not have the INSATALL mode on the 1242 AP if we are using it as ROOT and NONROOT.. this is available only on 1310 bridge or 1410 bridges.. not on 1242AP..
lemme know if this answered your question..
Regards
Surendra
====
Please dont forget to rate the posts which answered your question and mark it as answered or was helpfull

1300 Root-Bridge and Non-Root Bridge setup

I have two 1300s that I am trying to set up as Root Bridge and Non-Root Bridge, however, everytime i specify one of them as a Non-Root bridge, the radio0 interface becomes disabled. The only option that i am able to pick that enables the radio0 interface is "Access Point", which is what am trying to avoid it being.
Can anybody help me figure out how to go about this

A non-root's radio will show as disabled if it cannot find the root AP to associate to. Make sure you have "infrastructure-ssid" configured under the SSID on both the root and non-root bridges. Also depending on code versions you may have to configure the distance command under the radio interface on the root.

NON-ROOT TO NON-ROOT ASSOCIATION??

Hi,
I have one AIR-AP1242AG-A-K9, and two AIR-AP1242AG-N-K9. I have already configure them to work as bridge.
Root Bridge with wireless-clients ----------->     1   AIR-AP1242AG-N-K9
Non-Root Bridge1 with wireless-clients --->      1   AIR-AP1242AG-N-K9
Non-Root Bridge2 with wireless-clients ---->      1   AIR-AP1242AG-A-K9
I notice after reseting the root bridge or one of the non-root bridges that when I type the command "sh DOt11 associations" the results shows that there is an associatiation between the 2 Non-Root bridge. When this happend the connection of the clients associated to this APs is very unstable.
as far as I know the association is just between Root and Non-Root bridges.
I don´t know why this happend.
In order to avoid this I disable in one of the non-root bridge (AIR-AP1242AG-A-K9) the option "Force Infrastructure Device to associate only...."
Cisco's Docs show an example of config when there is one root bridge and one non-root bridge but in my scenario I have 2 non-root bridge and one root bridge.
I would like to know if the config for my scenario must be different from the simple scenario (1 root and 1 non-root).
I hope any of you can help me.
Regards

Hi Scott,
Thanks for your recommendations.
The mac-address authentication option you recommend is the option shown as "Root Parent MAC 1" ,"Root Parent MAC 2 ....." on Setting---> Network interface???
For root bridge , I should write down the MAC addres of the non-root bridge1 on Root Parent MAC 1 field and on the field of Root Parent MAC 2, the MAC of the non-root bridge2 ?? , am I right?
and for the non-root bridges I should just set on Root Parent MAC 1 just the MAC address of the root bridge???
Regards,

Root-Bridge and Non-Root Bridge Support

I was wondering if the ISR Routers (Cisco 1811w) support the root-bridge and non-root-bridge feature. If not is there another device apart from the 1310 and 1410 bridges that support this feature?
Thank You,
VT

Hi VT,
The ISR AP supports both of these roles;
Access Point Link Role Flexibility
Access Point Link Role Flexibility allows access point radios to operate in a combination of radio roles,
such as access point root, bridge root (with or without clients), bridge nonroot (with or without clients).
This provides a more flexible deployment scheme to support the various applications requirement. Note
that the ISR AP does not support access point repeater and WGB.
Wireless Non-Root Bridge
The wireless non-root bridge allows the access point radio to operate as the remote node in a point to
point or point to multi-point network.
Wireless Root Bridge
The wireless root bridge role provides support for both point-to-point or point to multi-point bridging.
http://www.cisco.com/en/US/docs/ios/12_4/12_4x/release/notes/rn1800xj.html
Hope this helps!
Rob

1242 Root or Non-Root Bridge

Greetings,
I have a small network that uses 1242 APs for clients machines. Our wired WAN link can be unreliable, so I would like to configure one of the 1242s as a bridge and connect it to one of the many wireless networks we have in our neighborhood.
I understand the 1242 APs can also operate in a bridge mode that could allow us to connect our network to one of these other wireless LANs. A couple of questions:
-Does the remote WLAN have to be a compatible cisco device in order for the 1242 to be able to bridge successfully?
-Which 'Role in Radio Network' do I choose for our 1242?
-How do I see what the SSIDs of the remote WLANS are and enter the relevant passwords (WEP, WPA, 802.1x, or WPA2)
-If this is not possible, what is the right device to use to connect our LAN to a remote WLAN without being able to control the hardware at 'both' ends of the bridge.
TIA

Can you please provide me with a network topology of what it is you would like to achieve. If you want the radio interfaces to associate to one another, then it is recommended to have them on the same channel, but for roaming instances, it is recommended that you have then at least 5 channels apart on the g radio so as to avoid any interference.
The 802.11A radios on the APs would be configured as bridges (one as
a "root" and the other two as "non-root") and the 802.11G radios
would service clients. Only one of the APs would require wired
connectivity in this scenario, as long as all of the APs are
communicating to each other on the 802.11A side. An important
consideration is that the 802.11A radios that are configured as "non-
root bridges" need only to communicate with the 802.11A radio that is
configured as the "root bridge". It is not necessary for the "non-
root bridges" to see each other. However, it is imperative that the
802.11A radio that is configured as the "root bridge" be able to
communicate with BOTH of the 802.11A "non-root" bridges. Therefore,
the antennas you choose for the devices is important.

Bridge 350 root and no root security ?

Hi,
i have 2 point to point bridge 350,
and only wep is active,
i know how to make radius with AP 1100 and client (pcmcia)
I want to know how i can secure my point to point connection. root --> no root
Is possible to set root on radius serveur and to set the no root for authentification on the root ?
Please help me.....

Dear Sir
http://www.cisco.com/univercd/cc/td/doc/product/wireless/airo_350/350brdgs/brscg/br350ch8.htm#1053765
Above url shows how to configure bridge link for leap .
I hope this helps .
On Non root you can enter username and password which will be authenitcated by ACS on on root side
On 350 bridge runs vxworks so we do not have radius
build in .
Regards

How do I change the document root and servlets root in WL 6.0

Please reply fast.
Suresh Wilson

In 5.1, you specify the "name" via the property:
weblogic.httpd.webApp.NAME=<path_to_war>
... where NAME is the path in the URL where you want your webapp to be
access from
Say:
weblogic.httpd.webApp.sampleapp=/home/weblogic/product/wls/5.1/sample.war
... the application's root is http://hostname/sampleapp
In 6.0, it seems to be the name of the war file itself. I deployed the
war twice, one using sampleapp.war and the other using sampleapp2.war,
and the webapps' root are http://hostname/sampleapp and
http://hostname/sampleapp2, respectively.
Is this rigth? Well, that is at least what I observed. The admin docs
regarding deploying was not clear on what is defined as "name" or where
it gets it from ... until I tried the above.
For a while, I thought that the application's root are defined by the
servlet spec.
John
Gene Chuang wrote:
>
Servlets in 6.0 must be deployed in .war; "document root" setting is irrelevant in 6.0.
Gene
"suresh wilson" <[email protected]> wrote in message news:[email protected]..
Please reply fast.
Suresh Wilson
Homepage: http://homepages.tig.com.au/~jmsalvo/

Can you change smcwebserver login from root to non-root user

I've tried digging in various place and haven't found any luck with this. Is it possible to change that default login from the system root to another user?

Not sure about the first part.
But i think you can fix the timing on the reader using this patch.
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-67245
Have a try not sure whether it will fix your problem.

Extending wi-fi network with apple and non-apple routers

I am trying (remotely) to hep my family set up their LAN network so that all of their devices are on the same modem instead of on two modems. The new modem that Comcast provided them is an Arris TG862 (combo modem/router) and they already have an Airport Extreme Time Capsule and an Airport Express. They also have an iMac and 2 ipads that need to connect wirelessly, and the network needs to be extended way to the other side of the house. There are two configurations that I think will work: can someone confirm for me that both of these would work? And am I right in thinking that the airport express cannot extend the network wirelessly if the airport extreme is not the primary base station? Thanks!
https://www.dropbox.com/s/8glryd7x2utkwu2/Sho%27s%20Modem%20Setup%20Guide.pdf

If the TG862 and the Airport Extreme have to be located next to each other, should I turn off the TG862's wireless network?
If they are going to be near each other, than yes, you will want to disable the Arris' wireless radio.
And how do I do that?
Off-hand I wouldn't know. However, you should be able to download a copy of the user's guide for this device. Most likely it will have a web-based administrator interface. Within this interface you should find options to configure its wireless radio.

Cisco Aironet 1250 - How to bridge two AP's and get Non-root to talk to Root AP

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      I have two buidlings acroos the street from each other. I have two Cisco Aironet 1250 wireless AP's with the first one going in the main building with network backbone. The Second AP goes across the street with the other wired network segment. Both AP's have long range antenas 2.4 GHZ on top of each building. I have configured the 1st one as the Root Bridge. The one across the street is configured as non-root bridge. I have both AP's configured with the same WEP key and also with the same SSID name with both set to broadcast it.   I am still unsure and confused as to how I get the non-root bridge to talk to and use the root bridge to get on the main network.
        1- It’s main to use the Root parent Mac address.
        2- Is there another config that I am missing to get the signal?
Note: I still not getting any signal from the root although distance between root and non-root is 330m
My root antenna is AIR-ANT24120 and non-root antenna is AIR-ANT1949 and attached files is my configuration files
Thank you.

1. How are the AIR-ANT24120 and the AIR-ANT1949 installed?
the AIR-ANT24120 is connected virtically on tower far 11m from the earth and AIR-ANT1949 is connected horizontally on tower far 10m from the earth
2. What is the distance between both APs?
350 m
3. Do you have clear line-of-sight between the two?
there is one tanker in the middle between them but it's far 7m from the earth
4. Is the two APs properly aligned?
i think yes and changed the aligned many times without any news (I don't have any tools for alignment)
5. Which point are the antennas connected to? Primary, Secondary or middle?
I tried in the primary and secondary but never tried the middle antenna
Thanks

Cannot Associate 1532 Bridges in Non-Root role

Hello,
Can someone please tell me what I am missing and why I cannot bring up 2 bridges in "Root" and "Non-Root" roles?
I have similarly configured bridges in a Root / Non-Root role several times before with older AP's and never had any issues... although it was always just 1 SSID, 1 Vlan, and no subinterfaces...
The only way I was able to get these 2 bridges to associate was to put the Non-Root bridge into a Workgroup Bridge role and then *BANG* everything worked perfectly. I tried getting rid of the authentication and tried using the Parent command but neither helped. Prior to entering Station Role Workgroup Bridge, the only message I would receive was showing on the Non-Root side and all it said was:
*Mar 1 07:27:13.867 GMT: %DOT11-4-CANT_ASSOC: Interface Dot11Radio0, cannot associate: No Response
*Mar 1 07:27:28.891 GMT: %DOT11-4-CANT_ASSOC: Interface Dot11Radio0, cannot associate: Rcvd response from 544a.0005.8030 channel 3 2815
What am I missing or what have I incorrectly configured on my Non-Root config?
Bridges are both 1532i with the Autonomous Image 15.2(4)JB5
Attached are the configs prior to changing the Non-Root AP to a station role of Workgroup Bridge.
Thanks!

Hi,
This should work with multiple sub-interfaces.
Few more suggestions
1. Remove this from your BRIDGE SSID & check
mobility network-id 1
This is only require when you configure L3 roaming & WDS in place.
http://www.cisco.com/c/en/us/support/docs/wireless/aironet-1200-series/8103-ap-faq.html
2. Try to set WPA version 2 & only AES encryption.
Also try to Associate your Bridges using Open Auth first (as shown in my blog post initial section) & then try to add security.
HTH
Rasika
**** Pls rate all useful responses ****

1230AG non-root bridge not associating

Hello everyone,
I am new at setting up root and non-root bridges. I am trying to set-up three 1230ag devices.
One as the root and the othe two as non-root, I copied the config txt from the root and
copied that into the two I am going to use for the non-root. That way the ssid's are the
same. When I set the role to non-root the radio is not enabled and I get a message saying
Interface Dot11Radio0,cannot associate:No Response
Does any know what I am doing wrong, and how to fix it
Thanks

The radio interface will go down in response to being configured as a non-root bridge, so that much is working. But there must be a configuration error if it won't associate. Can you post the configs so we can review them?
Are the bridges mounted, or are they on your desk?

Clients no received ip address from Non-root APs

I have 3 AP, one roor and Non-root. The Root AP is connected to ADSL modem which provide DHCP.
the clients form root AP received IP without problem, but whe I try to associate to non-root AP I can not receive ip from DHCP.
What it could be the reason???
I hope any of you can help me...
regards
ROOT#sh cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater
Device ID        Local Intrfce     Holdtme    Capability Platform Port ID
NON-ROOT1        Vi-Dot11 0         177          T I      AIR-AP124 Vi-Dot11 0
NON-ROOT2        Vi-Dot11 1         145          T I      AIR-AP124 Vi-Dot11 0
ROOT#
ROOT#
ROOT#sh dot11 associations
802.11 Client Stations on Dot11Radio0:
SSID [enlace] :
MAC Address    IP address      Device        Name            Parent         Stat
e
0021.00d6.6459 169.254.32.107 Br-client     -               003a.9924.2ba0 Asso
c
0025.9cab.3073 0.0.0.0         Br-client     -               003a.9933.e070 Asso
c
003a.9924.2ba0 192.168.1.249   bridge        NON-ROOT2       self           Asso
c
003a.9933.e070 192.168.1.251   bridge        NON-ROOT1       self           Asso
c
58b0.3568.372c 169.254.68.25   Br-client     -               003a.9924.2ba0 Asso
c
c417.fe02.645f 192.168.1.64    Br-client     -               003a.9924.2ba0 Asso
c
d8a2.5e49.5a83 0.0.0.0         Br-client     -               003a.9924.2ba0 Asso
c
ROOT#
ROOT#sh ver
Cisco IOS Software, C1240 Software (C1240-K9W7-M), Version 12.4(21a)JA1, RELEASE
SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 16-Sep-09 19:06 by prod_rel_team

Hi Surendra,
I set static IP on interface BVI1 on non-root1 and non-root2, also root-bridge I can ping to both of them, in fact I access to them via web and telnet.
I also set ip helper-address on interface Dot11Radio0 in all APs root and non-root..
My mind is about to crash...I don´t know what else to try.
thanks for your time.

B1400 non-root does not display/monitor temperature

I have root and non-root B1410 bridges. The root bridges will show temperatures in the GUI. The non-root do not. They show a WARNING: No Reading temperature monitoring is at 'INITIALIZE' state. What does this mean? I have not been able to find any reference. Other than root/non-root parms, I see nothing that is different in these configurations. They are in remote locations and temperature reporting is needed.

Thanks for the response. After some digging I found this BUG.
It says fixed in 12.3(8)JA
BUT I CANNOT FIND 12.3(8)JA for the 1400....
BUG ID: CSCsb63034
Bug Details
Headline show env No Reading Temperature monitoring is at INITIALIZE non-root
Product br1410
Feature OTHERS Duplicate of
Severity 3 Severity help Status Verified Status help
First Found-in Version 12.3(4)JA First Fixed-in Version 12.3(8)JA Version help
Release Notes
Symptom:
Non-root bridge running 12.3.4.JA & greater 'show env' output sometimes shows:
Environmental Statistics
Environmental status as of 09:47:18 S Aug 8 2005
Data is 55 second(s) old, refresh in 5 second(s)
WARNING: No Reading temperature monitoring is at 'INITIALIZE' state.
No Reading temperature is at 0 (C)
Workaround:
None but this appears to be cosmetic.
-pat

Network Design - Root and Non root bridges

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