Wireless clients load balancing on the APs on WLC 4404
Hi Experts,
I'm just wondering if the WLC 4404 with firmware 4.2.207.0 can load balance the wireless clients on different WAPs. Let's say that an AP is already handling 15 Wireless devices. When the 16th is trying to join, the controller somehow puts it on another nearby AP, even the signal from this AP is weaker. I heard the similar feature on other Wireless solution vendors. I'm just wondering if Cisco has the similar feature or not.
Thanks!
Yes it is known as aggressive load balancing sending a code 17 making the wireless client to loook at another nearby AP.
here it is the documentation:
http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a00809c2fc3.shtml
Similar Messages
-
Client Load balancing in AS with RAC
Friends,
1. Is an application servers cluster supports client load balancing.
If not....
2. if RAC is configured with appplication servers:
client -> appl sever -> rac_node -> shared database
is there a possibility to configure CLIENT load balancing with the aid of any of the above
components (or smth else that i missed) i.e. avoid using hardware client load balancing
or third party software client load balancing???
Thanks much for help.Hi, I have the same question.
I am using RAC (11.1.0.7) and would like to load balance two application servers in the same way, for apache, forms and reports using 10.2.0.4 iAS FAR.
If I could load balance the apache connection, I'm sure it would be simple from there, again, I only have software load balancing available.
Could you point me to a doco?
Thank you very much. -
Revision: 13477
Revision: 13477
Author: [email protected]
Date: 2010-01-13 05:17:10 -0800 (Wed, 13 Jan 2010)
Log Message:
Bug: BLZ-455 - Document client-load-balancing property in the sample config
QA: No
Doc: No
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-455
Modified Paths:
blazeds/trunk/resources/config/services-config.xml -
H-REAP and Client Load-Balancing
I'm told by Cisco that H-REAP does not support client load-balancing.
We have a situation where we want to deploy LWAPPs using H-REAP into a conference room where training would take place.
Any suggestions on how to overcome the inevitable slowness these people are going to experience from being unevenly associated with the APs?
We can't re-write the application so we are looking for a wireless solution.
Anyone hear about how other organizations have dealt with this type of situation?
I'll be glad to supply more details if I am not being clear in my description of the problem.
Thanks in advance. All responses will be rated.
PaulThis is the functionality which is missing in H-REAP: Client and Network Load Balancing
"Radio Resource Management (RRM) load-balances new clients across grouped lightweight access points reporting to each controller. This function is particularly important when many clients converge in one spot (such as a conference room or auditorium) because RRM can automatically force some subscribers to associate with nearby access points, allowing higher throughput for all clients. The controller provides a centralized view of client loads on all access points. This information can be used to influence where new clients attach to the network or to direct existing clients to new access points to improve wireless LAN performance. The result is an even distribution of capacity across an entire wireless network.
Note: Client load balancing works only for a single controller. It is not operate in a multi-controller environment."
I suppose if we limit the number of users that can associate with a particular AP then we will achieve some client load-balancing. Though a hard limit on the number of end-users will also lead to situations where some end users will not be allowed any access. -
WLC 7.5.102.0 Client Load Balancing
Hi,
Regarding 'Client Load Balancing' feature in WLC code 7.5.102.0, which one will take precedence:
- Load Balancing enabled in RF Profile and applied in an AP Group.
- Load Balancing enabled in WLAN
Also, is there any way to determine the statistics of the Load Balancing in RF Profile? (similar to the Statistics for Client Load Balancing enabled per WLAN in Wireless> Advanced > Load Balancing > Load Balancing Statistics)
Thanks in advance!
- edisonRF Profiles overrides any global settings, just like AP Groups can override the vlan or interface mappings.
say for example, I want to leverage the RF Profile for highly dense deploytment (like Town Hall or influx of users) and as result i want to deploy more temp APs that will coexist my existing APs. I just want to modify the High Density parameter - limiting the max clients only. but the RF Profile comes with the Load Balancing too and i don't think it cannot be disabled separately.
> Load balacing is enabled on the WLAN and isn't in the RF Profile. High Desnity, you create a RF Profile to disable the lower data rates, maybe 54 and 36 as mandatory and 24 and or 48 supported... depends on how much you want to shrink your cells. Also setting the max and min TX power.... no need for load balancing if you shrink the cells down.
so when i apply the RF Profile to the AP Group, the profile's Load Balancing settings will also be applied together with my preferred High Density settings - while my WLAN settting is not enabled with Load Balancing.
> No.... you either enable load balancing on the WLAN or not. The screen shot I showed you is a threshold configuration if its enabled.
Thanks,
Scott
*****Help out other by using the rating system and marking answered questions as "Answered"***** -
Load-balancing in the same IP subnet
Can I use load-balancing in the same IP subnet? I have the servers and client in the same IP subnet. I'd like to load-balance client traffic to server traffic. I also need to load balance traffic between servers. Is possible to configure it only in one VLAN?
For example:
CSS:
interface 4/2
circuit VLAN1
ip address 10.0.0.10 255.255.255.0
service s1
ip address 10.0.0.101
active
service s2
ip address 10.0.0.102
active
service s3
ip address 10.0.0.103
active
service s4
ip address 10.0.0.104
active
owner test
content client
vip address 10.0.0.3
add service s1
add service s2
active
content servers
vip address 10.0.0.4
add service s3
add service s4
active
Cat6500:
interface FastEthernet4/1 - clients
no ip address
switchport
switchport mode access
spanning-tree portfast
interface FastEthernet4/2 - servers
no ip address
switchport
switchport mode access
spanning-tree portfast
interface FastEthernet4/3 - CSS
no ip address
switchport
switchport mode access
spanning-tree portfast
interface Vlan1
ip address 10.0.0.1 255.255.255.0
ip policy route-map pokus
access-list 101 permit tcp any eq 80 any
route-map pokus permit 10
match ip address 101
set ip next-hop 10.0.0.10
Thank you
Romanyes, it's possible - use trunk with two VLANs (slide 9). or you can use 'transparent' mode (slide 11 - your attachment).
answer to your question (I have the problem to understand why there are two links with the same VLAN on the picture):
on the switch are two port interfaces in *switchport* mode (not trunk). now is it clearly?
result:
both methods (bridge mode with two vlans, or transparent bridge mode) use two vlans. it's on you, which type is for you preferred.
my recommendation is - use first method - one link to CSS with trunk configured in bridge mode (one ip subnet, two vlans, default gw for servers isn't css, but parent router)
martin -
Extend TCP Proxy vs. Client load balancing
I am unclear how proxy and client load balancing interact with respect to custom address providers. If I define my own address provider, and I do NOT set the load-balancer parameter to client in the client configuration, will the proxy still do load balancing of connections as described in http://docs.oracle.com/cd/E24290_01/coh.371/e22839/gs_configextend.htm#BEBCICDA ?
Edited by: user5179040 on Mar 23, 2012 9:43 AMHi,
The <load-balancer> element is only configured in the <proxy-scheme> and not at the client side. This parameter "proxy" dictates the proxy to use the specified strategy for load balancing client connections across proxies. The parameter "client" offloads the responsibility of load balancing to client across proxies or randomly select proxies.
I am unclear how proxy and client load balancing interact with respect to custom address providers. If I define my own address provider, and I do NOT set the load-balancer parameter to client in the client configuration, will the proxy still do load balancing of connections as described in http://docs.oracle.com/cd/E24290_01/coh.371/e22839/gs_configextend.htm#BEBCICDA ?
Hope this helps!
Cheers,
NJ -
Web Dispatcher not doing the load balancing on the portal
Hi Experts
I am having a production issue where the SAP web dispatcher is not doing the load balancing on the portal.
We have ESS/MSS portal with 1 Message server and 2 Application servers. The Web dispatcher is installed on the message server itself. Here is my Web disp profile file
Profile generated by sapwebdisp bootstrap
unique instance number
SAPSYSTEM = 16
add default directory settings
DIR_EXECUTABLE = .
DIR_EXECUTABLE = F:\usr\sap\<SID>\sapwebdisp
DIR_INSTANCE = .
Accessibility of Message Servers
rdisp/mshost = <hostname>.com
ms/http_port = 8111
#Log and Trace
rdisp/TRACE = 2
SAP Web Dispatcher Parameter
wdisp/auto_refresh = 120
wdisp/max_servers = 100
wdisp/shm_attach_mode = 6
configuration as per SAP note 538405
icm/max_conn = 7000
icm/max_sockets = 14000
icm/req_queue_len = 6000
icm/min_threads = 100
icm/max_threads = 300
mpi/total_size_MB = 500
mpi/max_pipes = 14000
wdisp/HTTPS/max_pooled_con = 7000
SAP Web Dispatcher Ports
icm/server_port_0 = PROT=HTTP,PORT=8888
SSL
icm/server_port_1 = PROT=ROUTER,PORT=443, TIMEOUT=60
SAP Web Dispatcher Web Administration
icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=./admin,AUTHFILE=icmauth.txt
wdisp/enable_j2ee_groups = TRUE
wdisp/HTTPS/sticky_mask = 255.255.255.255
In my Web dispatcher Admin page, I see all the three application servers, however the requests are going to only 1 App server. We are using ENd to End SSL configuration for the web dispatcher.
We also have a reverse proxy in the landscape and reverse proxy is forwarding all the requests to the Web dispatcher. In Web disp Admin page>Dispatching Module>SSL End to END dispatching, I see only ONE table entry in the dispatching table and it is our Reverse Proxy.
As all the requests are coming from only one source (Reverse proxy), it seems to me that the sap web dispatcher is forwarding those to the same Application server every time.
Can anyone please advise ?
I also tried to configure logon group in NWA, the web dispatcher is detecting the logon group and all the app servers in the logon group. It still not doing the load balancing.
I would greatly appreciate any help.
Thanks
VinyVincent, can you please elaborate more ? Is the web dispatcher not able to recognize stateful and stateless application requests ?
I saw that the procedure for configuring SSL Termination on Web dispatcher is long and complicated and looks like SAP web dispatcher needs to have SSL certificate of its own. As we have no ABAP servers and only Java servers, I can not even create the PSEs using STRUST (as described in SAP help -http://help.sap.com/saphelp_nw70ehp1/helpdata/en/48/99c388d7c46bb9e10000000a42189d/frameset.htm
We already have SSL certificates for Java App servers.
I suppose there should be a way for web dispatcher to identify the incoming requests and forward to appropriate application servers.
Any help is much appreciated.
Thanks
Viny -
Cache and Load Balancing for the Oracle APEX Listener
Hi,
I intend to use only HTTP access.
My database is Oracle 11gR2, SE, 32 bit.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.Error. To be closed.
-
Load balancing by the proxy plugin
Has anyone encountered this before:
I have a cluster of two WLS 5.1 servers, hosting servlets that serve web
requests. The requests are proxied through a web server ( I have tried
Weblogic, Apache as well as IIS). I also have a tool that simulates
concurrent web requests and fires them to the proxy server.
As per documentation, as the load balancing while proxying requests to
servlets is round robin, I expect that the requests are uniformly
distributed across the two weblogic servers. But what I see is a bit
different. In one case I fired 15 requests and found that 11 went to first
server and 4 went to the other.
Second time when I fired again 2 of them went to the first server and 13 to
the second one. I would expect that around half of the total requests
should be routed to each server everytime so that there is a proper load
balancing done by the proxy. I have not changed any configuration related
to the default load balancing algorithm. So I expect it is round-robin.
Has anyone encountered this before ? This happens to me irrespective of
which proxy server I use (i.e which proxy plugin I use). Is there some
other configuration required and I am missing something or is there some
inherent problem with the load balancing of the proxy plugins. Any info
would be highly appreciated.
Thanks
MainakCould you post this in weblogic.developer.interest.plug-in? This group is for
ejb related questions. Thanks.
Bill
Mainak Datta wrote:
Has anyone encountered this before:
I have a cluster of two WLS 5.1 servers, hosting servlets that serve web
requests. The requests are proxied through a web server ( I have tried
Weblogic, Apache as well as IIS). I also have a tool that simulates
concurrent web requests and fires them to the proxy server.
As per documentation, as the load balancing while proxying requests to
servlets is round robin, I expect that the requests are uniformly
distributed across the two weblogic servers. But what I see is a bit
different. In one case I fired 15 requests and found that 11 went to first
server and 4 went to the other.
Second time when I fired again 2 of them went to the first server and 13 to
the second one. I would expect that around half of the total requests
should be routed to each server everytime so that there is a proper load
balancing done by the proxy. I have not changed any configuration related
to the default load balancing algorithm. So I expect it is round-robin.
Has anyone encountered this before ? This happens to me irrespective of
which proxy server I use (i.e which proxy plugin I use). Is there some
other configuration required and I am missing something or is there some
inherent problem with the load balancing of the proxy plugins. Any info
would be highly appreciated.
Thanks
Mainak -
Load balancing in the process chains
HI friends
I have 6 subchains in 1 metachain . we are facing a problem where we have to 2 servers . but when we run the process chains they are occuping all the DIA process in only one server . the other server is empty . so is there a way that we can do the load balancing in the process chains . so that the process chains can occupy all the resources in both servers than only one . please do reply . this is very important . thankyou for all your replies .
*Points will be rewarded *.Hi,
check this out: https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes/sdn_oss_bc_ccm/~form/handler
additionally some information.
You can specify a server on which the chain will run, but this is not really load balancing. Load balancing must be set up by a basis person.
regards
Siggi -
Load balancing from the BI portal
Hi everybody,
We have a BW system with two application servers.
When we use BEx, the load balancing leads the user to the application server that is used less.
When we use the portal, everything goes over the central server.
Does anybody know how we can set up load balancing from the BI portal ?
Kind regards,
Marc van EijndtThe web dispatcher for your portal should do the load balancing... usually the scenario is the other way round - BEX tends to use the server irrespective of its load and Portal will hit the load balancer and hence lead to better performance ....
-
MPLS/VPN network load balancing in the core
Hi,
I've an issue about cef based load-balancing in the MPLS core in MPLS/VPN environment. If you consider flow-based load balancing, the path (out interface) will be chosen based on source-destination IP address. What about in MPLS/VPN environment? The hash will be based on PE router src-dst loopback addresses, or vrf packet src-dst in P and PE router? The topology would be:
CE---PE===P===PE---CE
I'm interested in load balancing efficiency if I duplicate the link between P and PE routers.
Thank you for your help!
GaborHi,
On the PE router you could set different types and 2 levels of load-balancing.
For instance, in case of a DUAL-homed site, subnet A prefix for VPN A could be advertised in the VPN by PE1 or PE2.
PE1 receives this prefix via eBGP session from CE1 and keep this route as best due to external state.
PE2 receives this prefix via eBGP session from CE2 and keep this route as best due to external state.
eBGP
PE1 ---------CE1
PE3----------P1 Subnet A
PE2----------CE2 /
eBGP
Therefore from PE3 point of view, 2 routes are available assuming that IGP metric for PE3/PE1 is equal to PE3/PE2.
The a 1rst level of load-sharing can be achieve thanks to the maximum-paths ibgp number command.
2 MP-BGP routes are received on PE3:
PE3->PE1->CE1->subnet A
PE3->PE2->CE2->subnet A
To use both routes you must set the number at 2 at least : maximum-paths ibgp 2
But gess what, in the real world an MPLS backbone hardly garantee an equal IGP cost between 2 Egress PE for a given prefix.
So it is often necessary to ignore the IGP metric by adding the "unequal-cost" keyword: maximum-paths unequal-cost ibgp 2
By default the load-balancing is called "per-session": source and destination addresses are considered to choose the path and the outgoing interface avoiding reordering the packets on the target site. Overwise it is possible to use "per-packet" load-balancing.
Then a 2nd load-sharing level can occur.
For instance:
__P1__PE1__CE1
PE3 \/ Subnet A
\ __P2__PE2__CE2
There is still 2 MP-BGP paths :
PE3->P1->PE1->CE1->subnet A
PE3->P1->PE2->CE2->subnet A
But this time for 2 MP-BGP paths 4 IGP path are available:
PE3->P1->PE1->CE1->subnet A
PE3->P1->PE2->CE2->subnet A
PE3->P2->PE1->CE1->subnet A
PE3->P2->PE2->CE2->subnet A
For a load-balancing to be active between those 4 paths, they must exist in the routing table thanks to the "maximum-path 4 "command in the IGP (ex OSPF) process.
Therefore if those 4 paths are equal-cost IGP paths then a 2nd level load-balancing is achieved. the default behabior is the same source destination mechanism to selected the "per-session" path as mentionned before.
On an LSP each LSR could use this feature.
BR -
Hi all,
a short question.
Is there a feature in Cisco WLC like load-balancing based on bandwidth utilization?
What I mean is, one AP (channel6) has a channel utilization of 40%, the neighbor AP (channel 11) has a channel utilization of 10%.
So I would like push new clients automatically to the AP in channel 11.
many thanks
MartinIt doesnt work worth a crap anyway ... Most clients don't adhere to code 17 so what's the point ...
Aggressive load-balancing works at the association phase. If enabled and the conditions to load-balance are met, when a wireless client attempts to associate to a LAP, association response frames are sent to the client with an 802.11 response packet that includes status code 17. This code indicates that the AP is too busy to accept any more associations.
It is the responsibility of the client to honor, process or discard that association response frame with reason code 17. Some clients ignore it, even though it is part of the 802.11 specification. The standard dictates that the client driver must look for another AP to connect to since it receives a "busy" message from the first AP it tries. Many clients do not do this and send the association request again. The client in question is allowed on to the wireless network upon subsequent attempts to associate. -
How can I debug Aggressive Load Balancing on the WLC ?
Hello Cisco-Experts,
I'm looking for the command on the Cisco WLC to debug Aggressive Load-Balancing.
There is a nice document, ID 107457 describing this feature, but it lacks the command.
Please investigate and help me and maybe improve YOur documentations.
Thanks in advance
WinfriedHello NetPros,
I have disabled now "Agressive Load Balancing" now on the WLC. To my surprise, still Load-balancing packets are received from our HREAP-APs via a WAN-Link on the central WLC.
Here is an example:
Tue Jan 13 15:35:59 2009: 00:1c:bf:4a:3f:2e LBS data stored for Mobile 00:1c:bf:4a:3f:2e from AP 00:23:5d:0e:e9:e0(0) new saved RS
SI (A -128, B -53), SNR 41, inUse 1, [rcvd RSSI (A -128, B -54), SNR 40]
Tue Jan 13 15:35:59 2009: 00:1c:bf:4a:3f:2e LBS data rcvd for Mobile 00:1c:bf:4a:3f:2e from AP 00:23:5d:0e:e9:e0(0) with RSSI (A -
128, B -55), SNR 42
Tue Jan 13 15:35:59 2009: 00:1c:bf:4a:3f:2e LBS data stored for Mobile 00:1c:bf:4a:3f:2e from AP 00:23:5d:0e:e9:e0(0) new saved RS
SI (A -128, B -54), SNR 41, inUse 1, [rcvd RSSI (A -128, B -55), SNR 42]
It is remarkable that the MAC-addresses of many of the WLAN-clients do not belong to our company and packets are send via a WAN-link.
Why do I see these packets while load-balancing is disabled ?
How is this working ?
Thank You for any explanation.
Winfried
Maybe you are looking for
-
Some tunes don't play in airport express
A few of the tunes in my play list show a little display icon. Although most of of the tunes play just fine through my airport express, the ones with the display icon switch back to my computer for sound???? frank
-
Run time error while running payroll simulation
Dear All SAP HR experts, I am getting an error in QA Server, This occurs whenever I run payroll simulation for an employees getting an error dump i.e .."TABLE_FREE_IN_LOOP" . The transaction code for which I am getting error is PC00_M40_CALC_SIMU. A
-
HOW DO I ENCRYPT A PDF DOCUMENT
I AM TRYING TO FIGURE OUT HOW TO ENCRYPT A PDF FILE. I HAVE THE PDF PACK AND ADOBE DOCUMENT SOLUTIONS. I LOOKED UNDER THE TOOLS TAB AND SECURITY TABS AND I STILL CAN'T FIND AN OPTION TO ENCRYPT THE DOCUMENT
-
N95 RM-160 upgraded to v20.2.011 (13-05-08) restar...
Hello, Yesterday i used NSU to upgrade my N95 RM-160 it was in v11 something like that to v20.2.011 and now my cell restart 10 time in 1hour or more. I would like to know where i can found my old firmware or what i can do. What I did : - i re install
-
Error Using the VB Outline API
Recently, I wrote a VB 6.0 application to perform a simple task in order to accomodate difficulties with Hyperion Planning. The application initializes the API, opens the outline, deletes a few members, restructures, and exits.Following is my functio