Private Link in UCCE

Hello I need to know if in one scenario of High availability of UCCE for Private Link is necessary a second link to do fail-over?
can somebody help me?
Thanks.

Why don't you read the SRND, page 2-44?
Best Practices
The link does not have to be redundant. If a redundant link is used, however, latency on failover must not exceed 500 ms.
Separate QoS classifications and reserved bandwidth are required for Central Controller high-priority and PG high-priority communications.
Link sizing and configuration must be examined before any major change to call load, call flow, or deployment configuration. This is especially important in the single-link model.
The link should preferably be a dedicated circuit fully isolated from, and not tunneled across, the highly available (HA) WAN.
Regards,
Geoff

Similar Messages

UCCE Router Call Key Reset Post Private Link Failure

Hi Guys
As above. My customer has UCCE v7.5.8 together with CVP 7.0 designed with a pair of Proggers geographically split with a 2x10Mb LES between the 2 sites supporting both the visible and private traffic (One LES for each).
The LES supporting the Private traffic 'blipped' but recovered within 10 mins. Now each day @ midnight Router Call Key starts at 201, however,whilst looking into a reporting issue I noticed that Router Call Key, seems to have reset to 201, but prepended with digits 34768, making a Router Call Key of 34768201. This appears to coincide with the time of the Private link recovery. Has anyone seen this before? I'm guessing this denotes a state-transfer/Db re-sync has taken place, or am I barking up the wrong tree?
Cheers
Freddie

Thanks Lasse,
When running that tool, all the links are showing zero utilization - not sure if the tool is able to show any more detailed information?
I should state that this Lync implementation is not live, there no Lync clients out on the corporate network, and I'm not expecting any traffic on the WAN site links at this point.
It just seems to be an issue when accessing as a remote user. At this point I think it must be because I have misconfigured CAC. And because it is happening for a conference and not peer to peer for the remote user, then it is probably the relationship
between the front end server pool and Edge server / remote user.
I have a local / central site defined in CAC with no bandwidth policy applied. Initially the subnets assigned to this central site were just the LAN subnets for the central site that I knew would have Lync clients running on them. Then as part
of troubleshooting decided to add the Edge Internal IP, and then Edge external IPs as subnets associated with this central site. Still getting the same problem though.
Its around about times like now where I wonder if it is something simple like a service needing restarting so I'll double check things like this. If you have any other ideas it would be greatly appreciated - a bit stuck.
Regards,
James

Solaris Cluster Private Link Failure

Hi,
I have configured Solaris Cluster 3.3 and add two Back to Back interconnect cable.
Sun Cluster is working fine but private link is fail and i can not ping the clusternode2-priv and clusternode1-priv form each other. some cammands faile
~ # ping clusternode2-priv
no answer from clusternode2-priv
~ # metaset -s nfsds -a -h t1u331 t1u332
metaset: 172.16.4.1: metad client create: RPC: Rpcbind failure
~ # scstat
-- Cluster Nodes --
Node name Status
Cluster node: n1u332 Online
Cluster node: n1u331 Online
-- Cluster Transport Paths --
Endpoint Endpoint Status
Transport path:   n1u332:nxge2           n1u331:nxge2           Path online
Transport path:   n1u332:nxge1           n1u331:nxge1           Path online
-- Quorum Summary from latest node reconfiguration --
Quorum votes possible: 3
Quorum votes needed: 2
Quorum votes present: 3
-- Quorum Votes by Node (current status) --
Node Name Present Possible Status
Node votes: n1u332 1 1 Online
Node votes: n1u331 1 1 Online
-- Quorum Votes by Device (current status) --
Device Name Present Possible Status
Device votes: /dev/did/rdsk/d4s2 1 1 Online
-- Device Group Servers --
Device Group Primary Secondary
-- Device Group Status --
Device Group Status
-- Multi-owner Device Groups --
Device Group Online Status
-- Resource Groups and Resources --
Group Name Resources
-- Resource Groups --
Group Name Node Name State Suspended
-- Resources --
Resource Name Node Name State Status Message
-- IPMP Groups --
Node Name Group Status Adapter Status
[root @ n1u332]
~ # ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
e1000g0: flags=1000802<BROADCAST,MULTICAST,IPv4> mtu 1500 index 2
inet 0.0.0.0 netmask 0
ether 0:15:17:e3:a4:e8
vsw0: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 3
inet 10.131.58.76 netmask ffffff00 broadcast 10.131.58.255
groupname ipmp-grp
ether 0:14:4f:f9:1:bd
vsw0:1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
inet 10.131.58.75 netmask ffffff00 broadcast 10.131.58.255
vsw1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 4
inet 10.131.58.77 netmask ffffff00 broadcast 10.131.58.255
groupname ipmp-grp
ether 0:14:4f:fb:44:4
nxge1: flags=1008843<UP,BROADCAST,RUNNING,MULTICAST,PRIVATE,IPv4> mtu 1500 index 7
inet 172.16.0.129 netmask ffffff80 broadcast 172.16.0.255
ether 0:14:4f:a0:81:d9
nxge2: flags=1008843<UP,BROADCAST,RUNNING,MULTICAST,PRIVATE,IPv4> mtu 1500 index 6
inet 172.16.1.1 netmask ffffff80 broadcast 172.16.1.127
ether 0:14:4f:a0:81:da
clprivnet0: flags=1009843<UP,BROADCAST,RUNNING,MULTICAST,MULTI_BCAST,PRIVATE,IPv4> mtu 1500 index 8
inet 172.16.4.1 netmask fffffe00 broadcast 172.16.5.255
ether 0:0:0:0:0:1
[root @ n1u332]
~ # dladm show-dev
vsw0 link: up speed: 1000 Mbps duplex: full
vsw1 link: up speed: 1000 Mbps duplex: full
e1000g0 link: down speed: 0 Mbps duplex: half
e1000g1 link: up speed: 1000 Mbps duplex: full
e1000g2 link: unknown speed: 0 Mbps duplex: half
e1000g3 link: unknown speed: 0 Mbps duplex: half
nxge0 link: up speed: 100 Mbps duplex: full
nxge1 link: up speed: 1000 Mbps duplex: full
nxge2 link: up speed: 1000 Mbps duplex: full
nxge3 link: up speed: 100 Mbps duplex: full
e1000g4 link: unknown speed: 0 Mbps duplex: half
e1000g5 link: up speed: 1000 Mbps duplex: full
clprivnet0              link: unknown   speed: 0     Mbps       duplex: unknown
Edited by: 808696 on Mar 2, 2011 8:27 AM

If your private interconnect had really failed then one or other of the cluster nodes would have panicked. I think it is more likely that either you have changed the nsswitch.conf entry for hosts such that it does not include 'cluster' first, although I would have expected that to result in an unresolved host name. The other option is that you have hardened your machine in some way with ipfilters or security settings.
Has it ever worked?
Tim
---

Fail Over and Redundancy with UCCE 7.5

I have a customer that is installing UCCE and they want to run side A and side B in stand alone if the visable and private network are both down.. Based on the SRND it states the system looks at the PG with the most active connections and takes over and the other side goes dark. I am desging this in a distributed mode with agants in both sites. Any ideas other than Parent Child.

... the system looks at the PG with the most active connections and takes over and the other side goes dark.
Not quite. Behaviour of a duplex Router pair when the private network breaks is a complex affair.
As you probably know, the MDS pairs form a "synchronized zone" - one MDS will be PAIRED-ENABLED and the other PAIRED-DISABLED.
Consider all the PGs out there. On some PGs, the active link of the pgagent will be connected to the ccagent on the enabled side, while on the remainder of the PGs, the pgagent active link will be connected to the disabled side.
When a pgagent has an active link to the disabled side, that MDS cannot set the message order - it has to send the message to its peer MDS (enabled), who sets the message order, and now both Routers get the message in the same order at the same time.
Therefore, when the private network breaks, any PGs that have the active link connected to the disabled side will realign to the enabled side. The idle side remains connected - it's just a state change.
Idle paths and active paths both count for device majority.
The rules for the enabled side are simple: if it has device majority, it goes straight to ISOLATED-ENABLED. If it doesn't, it goes to ISOLATED-DISABLED.
The disabled side is more complex. First it checks for device majority. If it has this, it initiates the TOS (test other side) process. If every PG it can communicate with reports that it has no communication to the other side, then it will promote itself to ISOLATED-ENABLED.
If the private network breaks and the public network is affected such that neither side has device majority, they both go disabled. Assuming the private link stays down, but the public network starts to come back in stages, eventually the majority of the PGs will be able to talk to one of the disabled sides, and then that will initiate the TOS process, and will go enabled.
Now let's consider what you have - you say "agents at both sites".
Let's imagine for a moment you have a 3rd site and 4th site that have no agents - they are just for the central controller. You have a dedicated link between sites 3 and 4 for the private network, and a public network out to sites 1 and 2
At sites 1 and 2, you have a Call Manager cluster, pair of PGs etc.
If the private network goes down, one of the sides will run simplex until the network is restored. Routing at sites 1 and 2 is unaffected.
If the public network to site 1 is down, routing at site 1 is broken until the network is restored. Site 2 is unaffected.
If the public network to site 2 is down, routing at site 2 is broken until the network is restored. Site 1 is unaffected.
If both networks are down, the whole system is isolated, no routing occurs until the visible has come back to the point where one of the sides will come up as ISOLATED-ENABLED.
Now what happens when we colocate the central controllers at the agent sites as in your model. Have we improved the situation? On the surface it looks like we have - and that's what your customer is saying with "they want to run side A and side B in stand alone if the visable and private network are both down".
When the private link breaks and the public link breaks, each router is ISOLATED-DISABLED and cannot come up because it only sees 1 of 2 PGs (the ones on the LAN at the site). So now you are down on both sites.
You might address this by installing at site 1 a third PG, configured in the normal way (it doesn't do anything) talking to both Call Routers, one local, one remote. It can be simplex.
Now when the private link breaks and the public link breaks, site 1 can see the majority of the PGs so it comes up in ISOLATED-ENABLED. Routing resumes at site 1, but site 2 remains off the air. This is the best result you can achieve.
The most important thing to think about is this: when the private network comes back up, the synchronizers try to do a state transfer. Assuming success, the synchronizers change to PAIRED mode. Now the routers and loggers will exchange state. If each site had been working in simplex mode ("split brain"), then when they come together you will have a totally messed up database. This corrupted state will most likely be unrecoverable.
It has happened in the past. I'll spare you the gory details.

Ucce deployment query

Hi i am working on a ucce deployment which has side a at Florida and side b at virginia.We had recommended the customer to go with 2 diffrent subnets for the private and public communication as a best practise mentioned,however the customer has some limitations on giving the extra subnet.The customer is ready to take the responsibility of matching the required bandwidth and latency all the time between the private links and public links.So ideally it has to be a single nic for both private and public.They have an MPLS backbone with a redundancy in place.Would it be smart to go with a single subnet?I am definetly sceptical on that.Is there any other such networks running in this mode and if yes what are the problems which could arise?

As a Cisco partner, you will have to submit your design to Cisco as part of the A2Q (Assessment to quality) process.
There are now three A2Q reviews, the second of which is the most important. You have to pass this before Cisco will release your software order. The A2Q process is extensive, and the correct design of the private link between the sides is something that will be carefully examined. If you run public traffic over the same link as the private traffic, you will not pass A2Q.
This is not a question of subnets - but actual physical links. It can be difficult trying to convince the customer that the Cisco requirements are mandatory - but you will have much tougher time trying to convince Cisco to release software for a design that is deficient in this area. They are almost certain to reject your design.
The customer may feel that they can control the bandwidth, latency and QoS marking to meet the Cisco requirements, and with care and attention to detail, it can be made to work.
However, you open up the ICM system to a very serious situation should the link fail and the Call Routers lose the private link and the public link at the same time. Depending on how the PGs are arranged, you can get into a situation called "split brain", where both side A and side B independently think they are in control, so the Contact Center continues running. But when the private link comes back and the two Router/Loggers try to synchronize, they cannot. Now you are in serious trouble and the database may be irretrievably corrupt.
Regards,
Geoff

Private interconnect oracle 10g RAC configuration

Can you please answer below questions?
Why does a private interconnect need a switch, and why is straight through cables not supported.

Hi,
Why do you need a switch between the nodes".When network plugs are pulled out from one node on a two node cluster, a split brain scenerio occurs. (just it's enough)
If you are using a crossover cable and you shutdown node (A) you will loose the network (private) link from node (B) (this happens in some servers.), Oracle RAC will not work with private network link down, both nodes will down and will not start until you get link on network private. (Goodbye high availability)
You will be very unhappy with the error ORA-29740. Prelude to suggest this note: Troubleshooting ORA-29740 in a RAC Environment [ID 219361.1]
There is no "why" Oracle RAC does not support crossover cable because RAC depends of SWITCH (it's a Hardware Requirements) and any problems in your environment Oracle will force you to implement a supported solution.
You will have implemented a poor environment, if you not use a GB switch for private network.
Oracle Words:
*Physical Layout of the Private Interconnect*
The basic requirements are described in the Installation Guide for each platform. Additional information about certification can be found on Metalink Certify.
The interconnect as identified by both subnet number and interface name must be configured on all clustered nodes.
*A switch between the clustered nodes is an absolute requirement.*
*Cluster Interconnect in Oracle 10g and 11g [ID 787420.1]*
Regards,
Levi Pereira

How to create a database link ?

i want to create a database link.please give mesteps

There is a chapter in the DBA Administration manual for versions 8.1, 9.2, and 10g on this topic which provide all the information you need.
You will need to choose the type of database link: global, current user, or imbedded user and if you need a public or private link.
Basically all you do is create a tnsnames.ora entry for the remote db and then create a database link (See SQL manual entry CREATE DATABASE LINK) that references the tnsnames.ora entry.
The manuals or the entire manual set can be downloaded from technet.
HTH -- Mark D Powell --

Object linked list

Hi am trying to create a linked list out of an object i have called ClassID.
I have a Link class (that creates a node correct?):
import java.io.*;
public class Link
     public ClassID id;
    public Link next;
     public Link(ClassID inID)
          this(inID, null);
    public Link(ClassID inID, Link next)
        id = inID;
        next = next;;
     public void displayLink() // display ourself
          id.toString();
} // end class LinkIf it does create node then I have a class called LinkList with the following insert method:
private Link first; // ref to first link on list
// insert at start of list
     public void insertFirst(Link id)
     { // make new link
          Link newLink = new Link(id);
          newLink.next = first; // newLink --> old first
          first = newLink; // first --> newLinkBut it doesnt seem to be working, could someone help me.
Thanks
Phil
Edited by: The_One on Sep 13, 2008 1:49 AM

I dont think its doing it properly. Iv tried goign through it but cant find the problem. Might be a problem with displaylist
Let me paste all my classes:
LINK METHOD:
import java.io.*;
public class Link
     public ClassID id;
    public Link next;
     public Link(ClassID inID)
          this(inID, null);
    public Link(ClassID inID, Link next)
        id = inID;
        next = next;;
     public void displayLink() // display ourself
          id.toString();
} // end class LinkLINKLIST METHOD:
class LinkList
     private Link first; // ref to first link on list
     public LinkList() // constructor
          first = new Link(null); // no items on list yet
     public boolean isEmpty() // true if list is empty
          return (first==null);
     // insert at start of list
     public void insertFirst(ClassID id)
     { // make new link
          Link newLink = new Link(id);
          newLink.next = first; // newLink --> old first
          first = newLink; // first --> newLink
public void displayList()
          System.out.print("List (first-->last): ");
          Link current = first; // start at beginning of list
          while(current != null) // until end of list,
               current.displayLink(); // print data
               current = current.next; // move to next link
          System.out.println("");
................. SOME MORE METHODS..........MAIN METHOD:
import java.io.*;
public class SortListApp
    public static void main(String[] args)
     BufferedReader inputStream = null;
     LinkList list = new LinkList();
     try
          inputStream = new BufferedReader(new FileReader("data.txt"));
           String inName;
          int inIDNum;
          int inACNum;
          long inTime;
          int inTransmode;
          //while ((inName = (inputStream.readLine()) ) != null)
               inName = inputStream.readLine();
               inIDNum = Integer.parseInt(inputStream.readLine());
               inACNum = Integer.parseInt(inputStream.readLine());
               inTime = Long.parseLong(inputStream.readLine());
               inTransmode = Integer.parseInt(inputStream.readLine());
               list.insertFirst(new ClassID(inName, inIDNum, inACNum, inTime, inTransmode));
          list.displayList();
          //System.out.println("Printed to file");
          //list.sort();
          inputStream.close();
     catch (IOException error)
          System.out.println("Error in file");
}Edited by: The_One on Sep 13, 2008 2:41 AM

Create database link

hi guys.
I need help to create database link with this scenario
i want to create database link between database A ,database B i want to access something inside B i have problems with command and i need help to create database link .
also does i need owner on both database to create DBlink.
Regards.

there is no scenario for creating database link except the prerequisite for having privlileges create database link for private link while for public is create public database link.
You can create database link in database A for the database B using its string and its username and password
Khurram

How do I turn off my private browser. I can't open my Yahoo acct.

??????????!

Close all tabs that are currently open. Once all are closed, you should see the Private link on the lower left of the screen. Tap that.

Sharing presentations online privately

We created a presentation in keynote for an important client. He's requested that we give him the ability to share the slide show with individuals over the internet. He also wants to be able to make it, not only private, but also only temporarily viewable by the individual. Ideally he would be able to set up temporary accounts to let them in the site to view the presentation, then delete their account after a period of time. Obviously the system would have to be very user friendly for him. We thought to use Slideshare. It gives a private link but that link can be passed around so that won't work. Any methods to accomplish this or workarounds?

sliderocket guys.... sliderocket.

DB links for SYS to use

Oracle 11gR2 RHEL 5
All,
I have a script that I will be running and it will be accessing multiple schemas in a remote database. The thought is to execute to script as SYS instead of re-connecting with a different schema throughout the script. But the question is what type of db link should I use for SYS to be able to run the script without any issues? Should I use a private link?
Thanks.

You have a couple of options:
you can create a public database link, but I generally advise against doing this - poor security practice.
You can create a db_link in the SYS schema, but then using the "connect to <user> identified by <password> using <SID>" syntax.
I personally don't like doing it this way, but it will work.
I would personally suggest creating the private db_link in the schema that will connect to the same schema in the remote database.
It's just cleaner all the way around and easier to manage (IMHO).
Ji Li

DB links and Security

DB Version:10gR2
To connect to a remote DB, we create only one DB link for that DB. We create a public DB Link like
create public database link wmat
connect to SYSTEM identified by jklf
using '(DESCRIPTION =
     (ADDRESS_LIST =
          (ADDRESS = (PROTOCOL = TCP)(HOST = 10.80.16.314)(PORT = 1521))
     (CONNECT_DATA =
          (SID = wmat)
)';Since we are connecting as SYSTEM user of the remote DB, we only have to prefix the remote schema name and access the DB object over there.
But, isn't this a security threat for that remote DB since we are connecting as SYSTEM over there?
Question1.
If you did a security Audit in these two DBs, what would you say?
Question2.
Is creating a DB Link for every schema or one DB link connected to the SYSTEM (as mentioned above) of the remote DB the standard practice?

Insignificant wrote:
But, isn't this a security threat for that remote DB since we are connecting as SYSTEM over there?Most definitely yes.
Question1.
If you did a security Audit in these two DBs, what would you say? Be very concerned. As DBA I would refuse to implement such a link as it exposes the entire database to the whims of developers and end-users.
Question2.
Is creating a DB Link for every schema or one DB link connected to the SYSTEM (as mentioned above) of the remote DB the standard practice?Each Oracle schema represents a logical container for data and code objects - think of it as a logical database. Each schema should have its own privs. Own resource profiles. Etc.
This ensures a lot of things. Better security. Increase robusteness. Better isolation. Better transportability. Etc. (and in all aspects, from development to deployment to operation)
By the same token, if that logical container needs a database object called a db link to communicate with a remote database container - than that must be a secure and private link for that container (schema) only.
One should only use the public "shared" container for common data and code objects. For example, for PL/SQL exception management PL/SQL libraries. Message log PL/SQL libraries. Etc. (this is similar to the shared object/dynamic link library concept of Linux/Windows applications - where common code resides in a sharable format)

How do I turn off private browsing in iOS7.1 on my iPad Air

I looked through the manual and in Support on line. It tells me to go to Settings>Safari> Privacy. I did that and could not find a 'Privacy' button or tab.

That sounds like old information to me. Private Browsing in Safari in iOS 7 is a link you tap in Safari. For information with a screen shot, see:
http://ipad.about.com/od/ipad_basics/ss/How-To-Enable-Cookies-Turn-On-Private-Br owsing-And-Other-iPad-Safari-Settings.htm
If Private Browsing is on, the address bar will be dark grey and the Private link till be white text on a blue background. Just tap that again.
Regards.

Doubly link list question

I desparately need help with these topic. Currently, I am doing a project using doubly link list data structure and swing components. However, I just could not get the data items of the doubly link list to display on the JTextArea. Is this possible at all or does anybody out there know in anyway to solve this problem?

Thanks a lot for the timely reply amolk. Here is the sample code you request for:
//The following code is my Link class:
import java.io.Serializable;
public class Link implements Serializable
public String dTitle, dPublisher, dCategory, dUserlevel, dDescription, dISBN, dDay, dMonth, dYear;
public float dPrice;
public int dQuantity;
public Link next; // next link in list
public Link previous; // previous link in list
public Link(String tit, String pub, String cat, float price, int qty, String ISBN, String day, String month, String year, String level, String des) // constructor
dTitle = tit;
dPublisher = pub;
dCategory = cat;
dPrice = price;
dQuantity = qty;
dISBN = ISBN;
dDay = day;
dMonth = month;
dYear = year;
dUserlevel = level;
dDescription = des;
public void displayLink()
System.out.println(dTitle + "");
} // end class Link
//The following is the actual doubly link list code
import java.io.Serializable;
public class DoublyLinkedList implements Serializable
public String back;
public boolean notFound = false;
private Link first; // ref to first item
private Link last; // ref to last item
public DoublyLinkedList() // constructor
first = null; // no items on list yet
last = null;
public boolean isEmpty() // true if no links
return first==null;
public void insertFirst(String title, String publisher, String category, float price, int quantity, String ISBN, String day, String month, String year, String userlevel, String description) // insert at front of list
Link newLink = new Link(title, publisher, category,price, quantity, ISBN, day, month, year, userlevel, description); // make new link
if( isEmpty() ) // if empty list,
last = newLink; // newLink <-- last
else
first.previous = newLink; // newLink <-- old first
newLink.next = first; // newLink --> old first
first = newLink; // first --> newLink
public Link deleteFirst() // delete first link
{ // (assumes non-empty list)
Link temp = first;
if(first.next == null) // if only one item
last = null; // null <-- last
else
first.next.previous = null; // null <-- old next
first = first.next; // first --> old next
return temp;
public void displayForward()
System.out.println("first --> last): ");
Link current = first; // start at beginning
while(current != null) // until end of list,
current.displayLink(); //display data
current = current.next; // move to next link
System.out.println("");
//Hoping to hear from you soon.

Private Link in UCCE

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