CSM + multiple client vlan

If a CSM has more than one client VLANs, connected to different routers, how does CSM decide what path to take when server initiate a connection? in other words is there a way to associate server vlan(s) to client vlan?

The term client vlan actually represents an interface between the CSM and the 6500's L2 and L3 vlan.
If you have multiple routers connecting to your 6500, they will be associated vlan(s) n the 6500 as any other vlan is...you define the balanced servers default gateway as the alias address within the server vlan define on the CSM...the CSM then forwards this to the gateway defined on the csm client vlan which is also the 6500's L3 interface. The 6500 then uses it's own routing table to define where the next hop for this destination is.
Hope this helps
Steve

Similar Messages

2 client vlan for CSM - possible?

Hi,
Is it possible that CSM has two client side vlans? The reason why i need to configure 2 client-side vlans is the ip address of the first client-side vlan is running out.
Thanks.
J.W.

Yes you can definitely use mulitiple client vlans with CSM.
CSM keeps track of the MAC address from where it recieves the flow
and send the reponse from reals back there.
If you define two default gateways then you will face some routing issues. With multiple
gateways defined, CSM randomly picks one gateway. This random selection can hurt you if your reals intiate coonections.
To tackle server initiated connection issue you can use following workaround
vserver Server-side
virtual 0.0.0.0 0.0.0.0 any
vlan 100 <------- server vlan where real exist
serverfarm RealX-out
inservice
serverfarm RealX-out
no nat server
real 192.168.1.1 <---- Gateway that you want to use for this traffic
inservice
Hope it helps
Syed Iftekhar Ahmed

How can I use multiple client side vlans in ACE?

In CSM we have a default-gateway per Client VLAN, in ACE there is no equivalent command! How does the ACE handles routing in this situation?

Hi,
Talk about a deja-vu. I was faced with the exact same challenge about a year ago.
Basically, I think you're looking at two options:
1) Firewall-consolidation - Consolidate your four firewalls into one, having one dedicated interface towards the ace and route all your vips using the ace as
    next-hop. It looks like your firewalls are virtual (but I don't know), so it's duable. But I don't know if this is even an option for you.
2) Per. clientvlan context - Context A for vlan1001, Context B for vlan1002 and so on. Each context handles clienttraffic for the respective vlan and since
    each context handles it's own routingtable, simply use the firewall-address as your default route. But from your drawing, it looks like your server-vlans
    are all connected to the same ace, so you will need to split that up. Assign each servervlan to an ace-context as you do with the clientside-vlans.
Well, a third option would be NAT in your firewall. Unless you have a specific need for the original client-ip the reach the ace, you could nat incoming clientsessions in each of the firewalls to an interface-address on that firewall, hence the ace will see the clientrequest as originating from the firewall and since ace has connected routes to each of the firewall, it wall return traffic to respective firewall and leave it to him to return the traffic to the client.
Since each firewall will present the packets with a unique NAT'ed address, you can apply different policies, parameters etc. for that NAT-address, if this is required.
hth
/Ulrich

CSM Loadbalancing multiple server VLANs

Is it possible to loadbalance servers located in multiple VLANs using the CSM? I have a need to loadbalance sites the may be located in different VLANs/Subnets but I am unable to consolidate them into a single subnet.

Its possible.
Just make sure that return traffic from Real Servers should not bypass CSM.
This can be achieved by using one of the three methods.
1. By configuring CSM's server Vlan IP as the Default Gateway on Real Servers.
Or
2. Using Source NAT on CSM.
Or
3. Using PBR
HTH
Syed Iftekhar Ahmed

CSM Multiples VLANs

In my enviroment lab, I´ve configured multiples vlans servers in CSM module, each vlan server belongs to a different subnet.
Is there some way to prevent real servers from a vlan server to access real servers from a different vlan server?

What about using a VACL to prevent access between VLANs?
~Zach

CSM client vlan addressing

Hi there,
I'm testing out some new topologies for a planned installation and I have a question about the addressing that should be used on the client vlan of the CSM.
In my topology I'll be running the CSM adjacent to a FWSM, with the MSFC will be on the inside of the FWSM. Typically I assign a router-router or router-FW link a /29 range and assign the actual devices addresses in that range. In my first test I setup the CSM and FWSM in a /29, and used client side VIP addresses in a totally different range. I added static routes to the FWSM to point to the CSM for those ranges and as far as I can tell it works great. I also tried the setup with the CSM, FWSM, and VIP addresses all in the same /24 range, and it also worked great.
So while it seems that both worked fine, is there any advantage or technical reason why one would be better than the other, or is it all a matter of choice? I've attached a diagram to illustrate.
Thanks,
Brandon

Hi Brandon,
Any of the two options are perfectly valid, and I see no technical reasons to choose one over the other.
Daniel

Is Multiple Compliant VLAN Possible with NAP 802.1x Enforcement?

Multiple Compliant VLANs for 802.1x NAP Enforcement

Hello Dear,
I am implementing NAP with 802.1x enforcement type. but it is an existing network where the organisation already has the network segmented into about 7 VLANs based on the departments in the organisation and the VLANs equally have IP interfaces on them (meaning
they are subnets).
By design NAP with 802.1x enforcement supports 2 VLANs: Compliant and Non-Compliant VLANs apart from the GuestVlan which the switch uses for 802.1x pre-authentication.
In my test lab, authenticated clients are pushed to Compliant VLAN if they meet SHV set. Also,if they don’t meet the SHV they are moved to Non-Compliant VLAN.
How do I apply this type of enforcement for multiple VLANs belonging to the organisation’s different Departments? Assuming I decide to create a single Non-Compliant VLAN this may cater for non-compliant clients but what VLAN among the 7 existing VLAN will compliant
clients be pushed into?
How will the switch know the VLAN a member of a particular department should be moved to since there are more than one Compliant VLAN assuming I configured ” NPS Network Policy” for more than one compliant VLAN?
Please your help is very important.
Thanks.
Alex.

Thanks Greg.
That works. But I have two other big challenges:
1st Challenge:
I have close to 50 VoIP devices as well as printers that must be exempted from NAP and the position of the 802.1x enabled switch is such that it is the Distribution switch to which Access Switches tied to each VLANs are connected(each access switch connect
to an authenticating port on the Distribution Switch) and IP Phones,data points and printers are then connecting to the Access Switches.
There is the limitation of how many MAC addresses can be exempted even when pattern matching is used in NPS(256 characters maximum) and this cannot cater for over 50 non-NAPcapable devices in this network. Should I create
several exemption policies using the pattern matching to accommodate the 50+ non-NAPcapable devices? Please advise.
2nd Challenge:
In this existing Network, there are branch offices that communicate with this HQ over a dedicated WAN connection(NOT VPN over internet). Please how do I ensure routing communication between HQ and branches is not hampered at the introduction of 802.1x NAP
enforcement at this HQ network? Your prompt response will be highly appreciated...
Thanks a great deal.
Alex.

Accessing the same stateful session bean from multiple clients in a clustered environment

I am trying to access the same stateful session bean from multiple
 clients. I also want this bean to have failover support so we want to
 deploy it in a cluster. The following description is how we have tried
 to solve this problem, but it does not seem to be working. Any
 insight would be greatly appreciated!
 I have set up a cluster of three servers. I deployed a stateful
 session bean with in memory replication across the cluster. A client
 obtains a reference to an instance of one of these beans to handle a
 request. Subsequent requests will have to use the same bean and could
 come from various clients. So after using the bean the first client
 stores the handle to the bean (actually the replica aware stub) to be
 used by other clients to be able to obtain the bean. When another
 client retrieves the handle gets the replica aware stub and makes a
 call to the bean the request seems to unpredictably go to any of the
 three servers rather than the primary server hosting that bean. If the
 call goes to the primary server everything seems to work fine the
 session data is available and it gets backed up on the secondary
 server. If it happens to go to the secondary server a bean that has
 the correct session data services the request but gives the error
 <Failed to update the secondary copy of a stateful session bean from
 home:ejb20-statefulSession-TraderHome>. Then any subsequent requests
 to the primary server will not reflect changes made on the secondary
 and vice versa. If the request happens to go to the third server that
 is not hosting an instance of that bean then the client receives an
 error that the bean was not available. From my understanding I thought
 the replica aware stub would know which server is the primary host for
 that bean and send the request there.
 Thanks in advance,
 Justin


 If 'allow-concurrent-call' does exactly what you need, then you don't have a problem,
 do you?
 Except of course if you switch ejb containers. Oh well.
 Mike
 "FBenvadi" <[email protected]> wrote:
 >I've got the same problem.
 >I understand from you that concurrent access to a stateful session bean
 >is
 >not allowed but there is a
 >token is weblogic-ejb-jar.xml that is called 'allow-concurrent-call'
 >that
 >does exactly what I need.
 >What you mean 'you'll get a surprise when you go to production' ?
 >I need to understand becouse I can still change the design.
 >Thanks Francesco
 >[email protected]
 >
 >"Mike Reiche" <[email protected]> wrote in message
 >news:[email protected]...
 >>
 >> Get the fix immediately from BEA and test it. It would be a shame to
 >wait
 >until
 >> December only to get a fix - that doesn't work.
 >>
 >> As for stateful session bean use - just remember that concurrent access
 >to
 >a stateful
 >> session bean is not allowed. Things will work fine until you go to
 >production
 >> and encounter some real load - then you will get a surprise.
 >>
 >> Mike
 >>
 >> [email protected] (Justin Meyer) wrote:
 >> >I just heard back from WebLogic Tech Support and they have confirmed
 >> >that this is a bug. Here is their reply:
 >> >
 >> >There is some problem in failover of stateful session beans when its
 >> >run from a java client.However, it is fixed now.
 >> >
 >> >The fix will be in SP2 which will be out by december.
 >> >
 >> >
 >> >Mike,
 >> >Thanks for your reply. I do infact believe we are correctly using
 >a
 >> >stateful session bean however it may have been misleading from my
 >> >description of the problem. We are not accessing the bean
 >> >concurrently from 2 different clients. The second client will only
 >> >come into play if the first client fails. In this case we want to
 >be
 >> >able to reacquire the handle to our stateful session bean and call
 >it
 >> >from the secondary client.
 >> >
 >> >
 >> >Justin
 >> >
 >> >"Mike Reiche" <[email protected]> wrote in message
 >news:<[email protected]>...
 >> >> You should be using an entity bean, not a stateful session bean
 >for
 >> >this application.
 >> >>
 >> >> A stateful session bean is intended to be keep state (stateful)
 >for
 >> >the duration
 >> >> of a client's session (session).
 >> >>
 >> >> It is not meant to be shared by different clients - in fact, if
 >you
 >> >attempt to
 >> >> access the same stateful session bean concurrently - it will throw
 >> >an exception.
 >> >>
 >> >> We did your little trick (storing/retrieving handle) with a stateful
 >> >session bean
 >> >> on WLS 5.1 - and it did work properly - not as you describe. Our
 >sfsb's
 >> >were not
 >> >> replicated as yours are.
 >> >>
 >> >> Mike
 >> >>
 >> >> [email protected] (Justin Meyer) wrote:
 >> >> >I am trying to access the same stateful session bean from multiple
 >> >> >clients. I also want this bean to have failover support so we want
 >> >to
 >> >> >deploy it in a cluster. The following description is how we have
 >tried
 >> >> >to solve this problem, but it does not seem to be working. Any
 >> >> >insight would be greatly appreciated!
 >> >> >
 >> >> >I have set up a cluster of three servers. I deployed a stateful
 >> >> >session bean with in memory replication across the cluster. A client
 >> >> >obtains a reference to an instance of one of these beans to handle
 >> >a
 >> >> >request. Subsequent requests will have to use the same bean and
 >could
 >> >> >come from various clients. So after using the bean the first client
 >> >> >stores the handle to the bean (actually the replica aware stub)
 >to
 >> >be
 >> >> >used by other clients to be able to obtain the bean. When another
 >> >> >client retrieves the handle gets the replica aware stub and makes
 >> >a
 >> >> >call to the bean the request seems to unpredictably go to any of
 >the
 >> >> >three servers rather than the primary server hosting that bean.
 >If
 >> >the
 >> >> >call goes to the primary server everything seems to work fine the
 >> >> >session data is available and it gets backed up on the secondary
 >> >> >server. If it happens to go to the secondary server a bean that
 >has
 >> >> >the correct session data services the request but gives the error
 >> >> ><Failed to update the secondary copy of a stateful session bean
 >from
 >> >> >home:ejb20-statefulSession-TraderHome>. Then any subsequent requests
 >> >> >to the primary server will not reflect changes made on the secondary
 >> >> >and vice versa. If the request happens to go to the third server
 >that
 >> >> >is not hosting an instance of that bean then the client receives
 >an
 >> >> >error that the bean was not available. From my understanding I
 >thought
 >> >> >the replica aware stub would know which server is the primary host
 >> >for
 >> >> >that bean and send the request there.
 >> >> >
 >> >> >Thanks in advance,
 >> >> >Justin
 >>
 >
 >

We have created shared folder on multiple client machine in domain environment on different 2 OS like-XP,Vista, etc. from some day's When we facing problem when we are access from host name that shared folder is accessible but same time same computer when

Hello All,
we have created shared folder on multiple client machine in domain environment on different 2 OS like-XP,Vista, etc.
from some day's When we facing problem when we are access from host name that shared folder is accessible but same time same computer when we are trying to access the share folder with IP it asking for credentials i have type again and again
correct credential but unable to access that. If i re-share the folder then we are access it but when we are restarted the system then same problem is occurring.
I have checked IP,DNS,Gateway and more each & everything is well.
Pls suggest us.
Pankaj Kumar

Hi,
According to your description, my understanding is that the same shared folder can be accessed by name, but can’t be accessed be IP address and asks for credentials.
Please try to enable the option below on the device which has shared folder:
Besides, check the Advanced Shring settings of shared folder and confrim that if there is any limitation settings.
Best Regards,
Eve Wang
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

WDS 2012 R2 - Cannot PXE multiple clients at the same time

Hello All,
This is my first post on here so I apologize if this is the wrong place. I work for a school district and we are implementing WDS 2012 R2. We've been extremely satisfied with the speeds and ease of use through unattend files. However, for
the past month I've been looking for a possible answer to a problem that has plagued us from day one of implementation.
So here's the problem:
I have a stand alone WDS server which is not a domain controller and is not our DHCP server. I have IP helpers and broadcast forwarders setup on the network. As well as option 66 and 67 in DHCP. So far so good right!
Well that's partially right. When we boot one client at a time to the WDS server. Everything works as intended. We can TFTP the necessary files from the WDS server. Everything boots up and we're off and running.
However, if we boot up two or more clients at the same time. The WDS server never responds to the traffic. The clients get their DHCP information. They start the referral and download from the WDS server, but get no response. I'm
really hoping that someone on here would have some insight of something I can try. I've about exhausted my list of peers and contacts. They're all stumped as well and were smart enough to stay with 2008 WDS.
I would prefer to stick with 2012 R2 since it's setup and working for the most part. With only this one hiccup.
Thanks in advance for any guidance!

Hello Daniel,
I appreciate the reply and apologize for taking so long to get back to this. Things have been a little hectic over here.
I have tried everything on this forum and I am still unsuccessful in PXE booting multiple clients at the same time.
Multicast is enabled on the server, and it works for the clients. However, as stated in the original post. I cannot boot multiple machines at the same time. I can start them from the image selection screen around the same time though. So,
that appears to be working fine.

How to use multiple clients within JCO?

Hi,
I'm pretty new to configuring Web Dynpro's with it's JCO connections. I have the following question.
We are using one portal (SAP EP 6.0_640 SP15) and one R/3 system (SAP ECC 5.0) with multiple clients (multiple customers who are all using the same portal).
Do I have to deploy a web dynpro for each client and maintain it's JCO connection for each client?
Or is there another way how I can set this up?
Thanks in advance.
Kind regards,
Dave Arends

Hi Dave,
Do I have to deploy a web dynpro for each client and maintain it's JCO connection for each client?
Or is there another way how I can set this up?
You dont need to deploy a web dynpro for each client . You can use same JCO connection for multiple User ID's ( multiple Clients mean multiple user ID's on the same portal ).
If this is the case then single JCo connection is enough to pull data from R/3 and show on portal page .
Thanks,
Nanda

How to control one server with multiple clients via TCP/IP

I am wanting to control a single server with multiple clients. Only one client would be active at a time, so there would be no conflict. I want to use TCP/IP. So far, I have programmed a cluster that passes data back to the server with no problems. The challenge come in when a second client is added to the mix. I have't been able to figure out how to turn each client on and send the appropriate data and then turn it off so it doesn't keep sending the same data to the server.
Here are the things that I have considered and did some preliminary testing, but don't really know how to impliment:
1. Send a numeric on the front of the cluster packet that tells the server that data is on the way.
2. Send a boolean on the front of the cluster packet to somehow turn the server TCP/IP on.
The problem I have found is that LabVIEW TCP/IP doesn't like to be turned on and off. If it doesn't get the data it expects, it goes into a reset mode and that kills the response time.
Any help?

You should consider implementing a set of simple one-byte commands that can be sent back and forth between the Server and the Clients. You can base all of these ideas off the example in the Example Finder under Networking >> TCP and UDP called Multiple Connections - Server.
You will have two loops in the server VI: one to wait for new connections, and one to send and receive data from the existing connections. For instance, after one of the clients connects, it can request control of the server to send data to it by sending the character "R" for request. Every time the send/receive loop of the Server executes, the first thing it can do is to check all the existing connections to see if any of the clients have sent a control request ("R"). If so, it will create a buffer (array) of control requests. This could be in the form of Connection IDs or indexes in the array for a particular Connection ID. Your choice.
After the Server receives a request for contol, if it is not already under control by another client, then it can send a response to the first client on the control request list. For instance, the server could send the first client a "S" command for send. Note that after the clients send their control request, they should execute a TCP Read and wait indefinitely for the server to respond with the one-byte "S" command. Then, once the client in control is finished sending data to the server, it could send the character "X" telling the Server to release it from control.
The example I mentioned above already does a similar thing. Note how when a client wants to disconnect, they send the letter "Q". You can see this in the Multiple Connections - Client VI. The Server then checks each individual connection to see if it's received this one-byte command, and if it has, it closes the connection to the client. This is what you would want to implement, but instead of having just one command, you'll have to distinguish between a few and build up a buffer of control requests.
Finally, if a client does decide to disconnect in your application, they could send the command "Q" just like the example above. At this point, close the connection and remove that Connection ID from the array of connections. You will also have to handle the case that this client was in the request control waiting line when it disconnected, in which case you need to delete it from that array as well.
This will definitely work for you, but it will take some work. Best of luck!
Jarrod S.
National Instruments

What are the possible approches for hosting a product(custom SP application) for multiple clients on a single SharePoint farm?

We have a product which is a custom application based on SharePoint Foundation 2010. Right now, for each of our client we create a dedicated server and host the application in the standalone deployment. Now, the requirement is to host multiple clients in a
farm deployment.
Challenges are: 1. The product has same name for the wsp that is deployed on different client servers as of now. How to distinguish for different clients on same farm
Currently the product specific css and jquery is in 14 hive. These files will be of difefrent versions for different client. How to segregate that?
How many web applications is recommend to be created in a single SPF 2010 farm? What are the challenges?
There are a couple of DBs created in SQL for the application. What is the best way to separate those for the client?
Essentially its the same product but with different versions for each client that we want to deploy in a single farm. What is the best practice to tackle this?

For the most part, these are not SharePoint questions per se, but product-specific questions you'd better ask the vendor about. To get in some more detail:
1. It totally depends on the scope of the solution. If its global, then you're out of luck and any changes you make affect all instances that use it. Better ask the vendor about it.
2. Not that many, let's say < 10, assuming you're web applications have separate application pools. Check out http://technet.microsoft.com/en-us/library/cc262787(v=office.14).aspx#WebApplication for
more info.
3. This is very application specific and really should be answered by the vendor. Not related to SharePoint at all.
4. Again, really depends on the product so better ask the vendor.
Good luck!
Kind regards,
Margriet Bruggeman
Lois & Clark IT Services
web site: http://www.loisandclark.eu
blog: http://www.sharepointdragons.com

Is it possbile to have multiple clients on our Production instance

We have our Production system with client 101
Our abapers want me to create another client 500 (config only - not easy to accomplish) to be used for our Mexican users.
I told them to create another company code for Mexico, but they do not know how to do this.
DO I have any other options, of yes
Pros and cons of having multiple clients in same production instance.
I know that any independent code is going to effect all clients.
THanks
Joe

Hi Jo,
you CAN create a new client, but mostly this is not done, because the effort to maintain multiple clients is mostly higher than just different company codes. Yes, ABAPs are client indpendent and therefore valid for all clients.
So, the argument, to "not know" how to create different company codes is not valid to me !
Regards
Volker Gueldenpfennig, consolut international ag
http://www.consolut.de - http://www.4soi.de - http://www.easymarketplace.de

Saving string from multiple clients on a server data structue

I have a server which receives updates from multiple clients ( in this example, football scores which are updated periodically by the clients.)
When the server receives the scores it needs to store them and at certain time intervals send the complete list of scores to multiple terminals at various locations.
I am approaching this task in stages...
stage 1.
..create the clients and server ...test the clients can send the data and the server can receive the data and output to screen..
this is completed
stage 2...
a/ on the server side store the received scores in a data structure (ArrayList<String> is what I'm thinking.)
b/ periodically output all scores to the screen (maybe every 30 seconds) and empty the ArrayList..am looking at the Timer class for this part..
stage 3
create the monitors and output scores to monitors periodically..
======================================================
right now I'm at stage 2a ie trying to store the received scores in a data structure.
i've created a method saveScore in the StoreScore class which is called by the StoreScore run method...
The saveScore method creates an ArrayList and adds the score to it...
Question
does every thread create a new instance of storedScores and therefore the scores are stored in a multitude of data structures?
I think the answer is yes and if so then this is not the solution...
What I'm thinking is , as all scores can be outputted to the server screen via System.out.println, is there not a way of saving all these scores in a single data structure?
The code below is the server code..
any advice much appreciated....thank you
/*=============================================================== */
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.concurrent.*;
class ScoresServer1{
final static int portNum = 1234; // any number > 1024
final static int numThreads = 10;
static ExecutorService pool;
public static void main(String[] args){
pool = Executors.newFixedThreadPool(numThreads);
System.out.println("Server running ...");
try{
ServerSocket servesock = new ServerSocket(portNum);
// for service requests on port
while (true){
// wait for a service request on port portNum
Socket socket = servesock.accept();
// submit request to pool
pool.submit(new StoreScore(socket));
}catch(IOException e){}
class StoreScore implements Runnable {
BufferedReader reader;
Socket sock;
public StoreScore(Socket clientSOcket) {
try {
sock = clientSOcket;
InputStreamReader isReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(isReader);
} catch (Exception ex) { ex.printStackTrace(); }
public void run() {
String message;
try {
while ((message = reader.readLine()) != null) {
// System.out.println("latest score: " + message);
saveScore(message);
} catch (Exception ex) { ex.printStackTrace(); }
public void saveScore(String message){
 ArrayList<String> storedScores = new ArrayList<String>();
 storedScores.add(message);
 Iterator<String> t = storedScores.iterator();
 while(t.hasNext()){
 String s = t.next();
 System.out.println(s);
}

does every thread create a new instance of storedScores and therefore the scores are stored in a multitude of data structures?
I think the answer is yes and if so then this is not the solution...The answer is yes. However, threads can share data, if they were properly synchronized. You should read the threading tutorial before creating a lot of hard to debug mistakes.
[http://java.sun.com/docs/books/tutorial/essential/concurrency/]

CSM + multiple client vlan

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