Connection between servers.

Hello All,
I need your help.
How I can run query to connect Server 1 to server 2?
CREATE DATABASE LINK CEN_ALL_LINK
USING 'edidb11b';
SELECT *
FROM REFERENCE.REF_MOD_DESC@ALL_REF_LINK;
This connection is not work. What I do wrong?

If you get duplicate database link name error, you've to drop the existing link with the same name and create this new one. You can also paste your tns entry details for that TNS alias instead of using 'edidb11b'.
CREATE DATABASE LINK <link_name>
CONNECT TO <user> IDENTIFIED BY <pwd> USING '<tns entry>'

Similar Messages

Connections between servers using CSS VIP?

In our new pre-production environment we have several servers connected to a 3750 switch, which is then connected to a CSS 11503. Upstream the CSS is then connected to an ASA firewall pair. The CSS VIPs are 10.22.1.0/24 on the "outside" and the servers have 10.21.1.0/24 addresses on the inside. The CSS inside & server 3750 switchports are all on the same VLAN. There is no PAT/NAT configured (except for the VIP being translated to a chosen server IP I suppose).
Whilst the clients will connect to the servers via the VIPs what we want is for each server to also be able to talk to other servers via a VIP. This is because some of the servers provide a service (LDAP actually) that we would like to be load balanced.
Now, what is curious, is that *this works* in our production environment where the servers are *directly* attached to the 8 port switch module in the CSS. However in this new environment, where the 3750 is between the servers and the CSS, it doesn't (actually you can ping the VIP sucessfully but nothing else works).
I have seen other postings on NetPro where people are trying similar things, like: http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Networking%20Solutions&topic=Application%20Networking&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1dd81312 and http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Emerging%20Technologies&topic=Content%20Networking&CommCmd=MB?cmd=display_location&location=.1dd72fd0
The relevant CSS config I think (there are lots more services etc but they are all similar) is:
circuit VLAN1
ip address 10.21.1.100 255.255.255.0
circuit VLAN2
ip address 10.22.1.1 255.255.255.0
keep alive ssokeepalive
type http
keepalive port 7777
uri "/sso/status"
keepalive frequency 10
keepalive maxfailure 2
tcp-close fin
active
service pulpldp001sso
ip address 10.21.1.6
keepalive type named ssokeepalive
active
content SSO
vip address 10.22.1.12
protocol tcp
port 7777
application http
url "/*"
advanced-balance cookie
add service pulldp001
active
i.e. VIP 10.22.1.12 will be directed to the server 10.21.1.6 (only the one shown above).
Q1) My first question is: is server to server communication via an outside VIP possible?!
Q2) Given that this seems to work our production environment without the 3750s any idea what areas of config could be wrong on the 3750 or the servers? (we've tried default routes of both the 3750 and the ISS inside address but that hasn't worked). Note the ping from a server works but when we try, say, "telnet 10.22.1.12 7777" that doesn't connect.
Q3) Let's assume that the servers run more than one service, e.g. an HTTP and an LDAP service. If a server can communicate with another server using its VIP, will it work from one server up to the CSS/VIP and back to itself? (of course it may or may not actually return to itself depending on the load etc)
I can provide full configs on Monday if required.
Hope these aren't dumb questions! Many thanks!
Simon
PS. the CSS is running 7.50 at the moment but could upgrade to 8.2 if required

Thank you Adedayo - that appears to have done the trick! I can't believe it: one little keyword!
I have to say, even once you told me the answer I still didn't find the Cisco content config manual very helpful on this point (perhaps I'm looking in the wrong place?).
Note: we're not currently doing any PAT on the CSS so don't have any source groups set up - perhaps most people do and so don't have the same problem.
I'll get chance to report back on some proper testing next week and promise to update this conversation.
Adedayo: sorry, I wanted to flag your post as solving my problem once I was sure next week but now the tick box has gone - if you reply again I'll flag that! I appreciate you taking the trouble to post.
One final question: do you have a situation where you use a VIP from a server to potentially connect back to itself? If so, does it work OK? (e.g. if you have a webserver can you connect to the content VIP that it belongs to?)
Simon

Connectivity between blades in Cisco UCS environment

We're trying to setup a UCS environment for testing purposes, and seem to be unable to establish any connectivity between servers within the UCS. At the moment, the environment has no upstream LAN connectivity and therefore no uplinks defined on the fabric interconnects. We had wanted to run the test within the UCS keeping it isolated, and connect in via the management interface to UCS Manager. I suppose my question is, is it possible to get the blades to talk to each other without uplinks defined and connection to an external network?
Many Thanks - Lee

Further to what has been mentioned, you can stay in end-host mode but change the behaviour for no uplinks, which is the Network Control Policy.
Not sure where it is on the GUI (it may be CLI only) but its described at http://ciscosystems.com/en/US/docs/unified_computing/ucs/sw/cli/config/guide/1.0.2/CLI_Config_Guide_1.0.2_chapter15.html
The config item is
set uplink-fail-action {link-down| warning}
The description is
Specifies the action to be taken when no uplink port is available in end-host mode.
Use the link-down keyword to change the operational state of a vNIC to down when uplink connectivity is lost on the fabric interconnect, and facilitate fabric failover for vNICs. Use the warning keyword to maintain server-to-server connectivity even when no uplink port is available, and disable fabric failover when uplink connectivity is lost on the fabric interconnect. The default uplink failure action is link-down.
When you have no uplinks all the NICs look down! This is by design. Remember you have a fabric A and a fabric B. When you have a fabric that gets isolated do you want it to fail the Ethernet links so that the blades know about it and the network failover software in your OS can send the data over the working fabric. Or do you want your blade to not know and keep sending data out, but if its destined for outside the environment its not going to get there.
Hopefully that adds some more clarity to your situation.
Rodos

CSM module: rserver to rserver (or VIP) connections between serverfarms

Hello,
I am trying to audit an existing configuration of CSM module.
Unfortunately have not an experience in CSM module configaration.
The main goal is to understand if there are any direct connection between servers
in different serverfarms (i.e. server from one serfarm opens session to server in
second serverfarm to VIP or to real IP). Also I need to know if there exist any
server initiated connection.
For serverfarms in CSM configuration there are two options configured
1)
nat server
nat client <pool>
2)
nat server
no nat client
As I understand, if there is no "static nat" lines in CSM configuration it means that
there can not be server initiated connections. Is this correct?
What is the best way to check if there are any direct connections between different serverfarms?
Is it enough to take an output of "show conn" command like
    prot vlan source                destination           state
In UDP 149 10.13.205.20:57944    10.36.22.20:23235     ESTAB
Out UDP 449 10.36.22.24:23235     10.13.205.20:57944    ESTAB
and check if there is "In" connection from <source IP> in one serverfarm to <destination IP>
in second serverfarm? As for now I did not see such connections.
Will be presented direct server-server/VIP or server initiated connections in "sh conn" command
output for CSM module?
Could you advise me how to check this in CSM configuration or show commands output?
Thank you in advance.

If the vserver to vserver connection is made between devices in the same subnet and the client uses the vsever address (rather than a vip address) then this will not be seen via the CSM at all. If the client vserver targets the vip address, then it is probable that you will require source nat to make it work. If a vserver starts a connection to another vserver addess (not vip) in a different subnet and the connection flows via the CSM, then the CSM will show this in its connection table. You can test this via "telnet " and check the connection table. Any working vserver to vip connections will be visible in the connection table. Matthew

Help Needed in establishing connection between Kepware OPC server and UDS 4

Hi All,
I am in the process of establishing connection between Kepware OPC server and UDS 4.0,
Can anyone guide me through the process of configuring UDS 4.0 to establish conection with the Kepware.
Any standard documentation on UDS 4.0 will be of great help.
Thanks in advance,
Shyam

HI Rajesh,
I am creating OPC DA instance and when i try to browse for the OPC servers available in the machine, the list is blank. i am not able to view any OPC servers.
Actuallt the Kepware OPC server and UDS are installed in the same machine.
Can you plz through some ligh on this
Regards,
SHyam

RFC connection between two SAP systems (with SAP router)

Hi!
I would like to set up a RFC-connection from SAP Solution Manager to other SAP system.
The network connection between the servers is VPN.
How can I set up this RFC-connection, if my connection between two SAP systems looks as follows,
(I use the following SAP routers)?
my server --> customer
my server --> internal SAP Router server xy (10.101....) --> SAP Router customer 2 (10.1....) --> SAP System customer (134....)
Back-way
SAP Systeme customer --> SAP Router customer (134.1....) --> internal SAP router (212.6....) --> my server
How can I set up this RFC-connection, if my connection between two SAP systems looks as follows,
(I use the following SAP routers)?
something like:
/H/10.101..../S/sapdp99/H/10.1.4..../S/sapdp99/H/134...
Thank you very much!
regards
Thom

Same answer as in the other forum where you cross posted....

The connection between two Tuxedo machines

We want to locate our servers(services) onto different machines, we want to know
:whether the connection,between two machines, is built up at the first time the
servers booted and kept persistently connectted, or just build up the connection
when there comes a request.

Remote machines connect to one another lazily. If you have machines A
(master), B and C, then B and C do not connect until a request is made
between B and C. All machines connect to the master at boot time.
roopesh wrote:
>
The connection is persistent and is not request based.
The machines communicate using BRIDGE.The DBBL which runs
on the primary master machines keep doing sanity checks
and health of BBL at all the machines connected and if
any BBL does not respond for the specified time(set by
DBBLWAIT) in RESOURCES section.then that machine gets partitioned by DBBL.
for more info you can read tuxedo documentation.
Thanks
Roopesh
"YANG YI" <[email protected]> wrote:
We want to locate our servers(services) onto different machines, we want
to know
:whether the connection,between two machines, is built up at the first
time the
servers booted and kept persistently connectted, or just build up the
connection
when there comes a request.

Gig DWDM connection between 2 x 3750's

We have a customer that has a gig DWDM connection between 2 cat3750's. The interfaces are SMF.
He is complaining of throughput issues. He has a pair of AIX servers transfering a file between them using we believe RPC (not 100% sure). If he does it across the gig link he gets 300mbps, if he does it across a single switch or across two switches locally connected he gets 700mbps. I have checked the cfgs, and fibre connections and interface errors. they have also used spare 3750's to do the test again. Not sure if the transfer suffers in both directions. They are not using oversized frames. We have not replaced the GBIC's yet.
The links have been tested by ISP, and show now issues, the tets results show now latency. The 3750 code is SEC.
Any ideas

Is MLS QoS enabled on the switch by any chance?
I expirienced trouble with 3750 using 1000-BASE-SX and 1000-BASE-LH lasers that gave poor peformance with file transfers.
This was the case on switches that had MLS QoS enabled for IP phones.
The symptoms are described in bug toolkit CSCeg29704. There is a workaround. Upgrading to 12.2(25)SED or higher resolves the problem.
Release Notes
After enabling QOS on 3750 and 3560 switches, certain application (mostly bursty
and TCP based) experience significant performance degradation due to unexpected
packet drops on some of the egress queues.
This is due to initial default egress queue threshold settings
(when qos enabled) not optimized for this type of traffic pattern.
This initial default queue threshold settings (when qos enabled)
thus need to be changed to accommodate these traffic.
Workaround:
Tune the egress queue thresholds parameters to
allocate more to the affected queues.
Specifically, egress queue 2 thresholds need to have the following settings:
Thresholds1 = 200
Thresholds2 = 200
Reserved = 50
Maximum = 400
e.g.
mls qos queue-set output 1 threshold 2 200 200 50 400
mls qos queue-set output 2 threshold 2 200 200 50 400
HTH
Leon
* Please rate useful posts.

Connection between Solution Manager Testing und Test Workbench

Hello,
I have Problems understanding the connection between the test organization in the solution manager and the test workbench in the corresponding sap system.
The documentation says that the Solution Manager reuses the test workbench functionality. It is not clear for me how this connection works. In the solution manager you define test cases in the configuration of the project. When you create a test plan in the solution manager you can use the testcases of the project. But when you execute the testcases you do it in the corresponding sap system where the transaction of the test case is. Does this mean that the test cases und test plans that you create in the solution manager are transported to the target sap system? If this is true, when is the transport taking place?
Thanks a lot!
Regards, Lars.

Hi Lars,
I think you are confused with solution manager and tools like QTP.
The difference between solution manager and QTP/ECATTT is the eCATT or QTP are used for creating the test scripts or the test cases but solution manager is used for storing all types scripts centrally.
It means say you have manual test scripts eCATT and Ext QTP scripts lying on the R/3 servers but from solution manager you can create a project comprises of all the scenario and linked test cases of various type.
Now at a later time when you start testing a manager login to solution manager enter the test plan project name etc and can check what is the current status of the test
1. how much testing is completed
2. Who is the tester what is the test script where or on which testing took place etc
you can check my weblog to knw how to manage and perform testing via solution manager.
/people/community.user/blog/2006/12/07/organize-and-perform-testing-using-solution-manager
Please reward points for the same.

Direct Connection between clients using sockets

Hi, I'm a new user and i have a problem with sockets:
The question is how can i directly connect two users that are already connected to a server in other machine???
I mean
user1 is connected to server
user2 is connected to server
user1 tries to communicate with user1 but don't want to use the server, and the server only provides the client1's ip
I first thought to do this:
user2 asks to server for the info of a client1-server waiting for connections, and i think it could work fine, but only if the ports are not closed by firewall, because client-server will be running in a transparent mode for user and user may not know anything about servers, sockets, ports, etc. the user only will work with a gui or something else and that's all
Does anybody know what can i do to make this possible???
PD
Sorry for my bad English

It can be implemented like you said. Make one of the clients open a serversocket and pass the ip and port number through the server to the other client with information on where to connect.
If you're going to use direct connection between clients a lot then I would recommend that every client open a default serversocket at startup and register that information with the server and then every other client can ask the server for the ip and port to whatever client they wish to open a direct connection to.
Be aware that clients often are behind NATs and firewalls, so if need to deal with those issues you got to use hole punching (http://en.wikipedia.org/wiki/hole_punching) - pref on a known port like 80 - and to deal with the less frequently used application firewalls you can use http encapsulation in addition.

Connectivity between Shanghai, China and Europe (Switzerland)

Anyone has a similar regional business network where servers are based in Europe (in my case Switzerland) and client machines are located in China? It's been a chronic issue that connectivity between such China-based clients and Switzerland Servers can be randomly intermittent (data loss as high as 10-40%) while connectivity to ISPs at each side remains consistent. We have similar setup in other Asia offices like Singapore as well but face no such issues in terms of connectivity to Switzerland servers. I'm beginning to think is it because of the China ISP, but up till now cannot gather any supporting evidence. Each time the intermittency occurs, a restart of Shanghai's internet router will once again resume normal and consistent connectivity to the Swiss servers.
This topic first appeared in the Spiceworks Community

Replacement phones can be new or refurbished at Apple's discretion. Generally, they will be refurbished. A refurbished phone is indistinguishable from new. It has been returned to factory spec, and, as I understand it, has a new battery and casing.
All iPhone 5's have both GSM and CDMA chips. However, in order to work on a given CDMA network, the phone needs to have been added to that providers database. What that means on the consumer end is, essentially, if you want a phone to work on a CDMA provider's network, you have to buy it from them (or someone who did).

Connecting redundant servers to redundant CSS

Hi,
I'm quiet new with CSS configurations and currently working on an assignment to get two servers (with both a redundant network connection) connected directly to a redundant CSS configuration. I have tried a box-to-box redundancy configuration but i'm having some problems with the fallback and inside connectivity. When i look at all the configuration guides and tips then there's always a switch connected between the CSS and the servers. Before i ask for help with this config i want to know if the design that they've put me up with can work! Attached there's a picture of the design. The servers have teaming enabled with fail-over option. When the primary CSS fails, the secondary CSS will take over. The primary link of the server will fail and perform a fail-over to the secondary link. I have my doubts that this design will work.
I hope that someone can get me started :)
Kind Regards,
Daniel

We have seen too many issues in the past with servers using redundant interfaces.
We always end up recommending not to use such a solution and to insert at least 1 switch between the CSS and the servers.
Gilles.

Internet Connection loss after losing connection between 2 sites

Hello,
I have started working for a company over a year ago and recently we are running into an issue with losing internet after a loss of connection between companies site. Below is a summary of setup.
Company has 2 locations, Site A and Site B..both same domain
Site A has DC and other servers such as ERP, Document Control Software.
Site B has DC, Printer Server, File Server and other essentials servers.
Each site has own independed 20 MB connection.
Site A and B are linked via MPLS and only used for ERP, Document Control software, and DC traffic.
Recently we started to have frequent connection issues with the MPLS and as a result I started to notice none of the users at Site B can access the internet such as google.com, msn.com...etc. As soon as MPLS connection is restored interent works.
The DC at Site B was setup before I started working for company.
I have been trying for the past few days to figure out why Site B is losing connection when MPLS Tunnel is not operational...but so far no luck.
I am very sure that internet traffic is not routed via MPLS because when internet is working the IP lookup such as "whatismyipaddress.com" points to ISP IP address for site B. Also when doing tracert to external website the route is via ISP for
Site B.
I think this issue is related to DNS but cannot tell the cause or how to fix?
Thanks for assistance in advance.

Hi
Having said internet is not routing via MPLS, Even i think to be a DNS issues,
Try to check the below
Ensure all the client DNS is set to AD DNS server
In AD DNS server ensure its not forwarding DNS query to Other site
During outage check any client PC manually changing the DNS IP to 4.2.2.2
- all client DNS are set to AD DNS server
- I checked the properties for the AD DNS and found there are 3 forwarders listed.
The first IP is at Site A which is resolved.
The second IP I am not sure about since it is not even in our subnet (not resolved)
The 3rd IP seemed to be for an old DC that is no longer operational (not resolved).
- During outage if I change client machine DNS to 8.8.8.8 or 4.2.2.2 they can access the internet.
I guess my issue is with the forwarders. Would the right step be remove all 3 forwarded and add 8.8.8.8 and 4.2.2.2?
Thanks.

Connection between BO Mobile Server and BOE

Hi All,
I have installed BO Mobile on the same machine which as Business Objects Enterprise.
Have the following questions
1. How the mobile server connect to the enterprise server? Let me know what are the steps needs to be done for the connection between the mobile server and enterprise.
2. How the connection between mobile server and proxy server
I gone through the installation and deployment guide of businessobjects mobile but it not clearer to me.
Kindly, help me out.
Thanks and Regards,
Yuvaraj.

Hello,
I have a similar scenario to that you have described, in order to test;
BOE and BO Mobi deployed on the same machine, no proxy. I am also using a BB simulator in order to test connecting.
I have installed the client s/w to the simulator device, but am unable to connect to BOE from the device.
Below is the info from each of the config files and device.
Can you tell me if there is a needed change?
1. VMS
$Id: server.config 28982 2008-01-03 21:52:21Z hmak $
config for VMS Server instance
VERSION = 6.0
[server]
SERVER_ID=VMS_SERVER
[comm]
BINDTO_PORT=11711
MANAGEMENT_PORT=11712
EXTERNAL_HOSTNAME=<BOE machine Name>
common across all VMS servers
INCLUDE_CONFIG_FILE = config/cluster.config
vim:noet
2. VAS:
$Id: server.config 27498 2007-10-01 19:12:19Z hmak $
config for Authentication Server (VAS) instance
VERSION = 6.0
[server]
SERVER_ID=AUTH_SERVER
[comm]
BINDTO_PORT = 11011
MANAGEMENT_PORT = 11012
EXTERNAL_HOSTNAME=<BOE machine Name>
common across all auth servers
INCLUDE_CONFIG_FILE = config/cluster.config
vim:noet
3. Handheld Connection Settings:
Mobile Server: <server IP Address>
Port Number: 11011
CMS Name: <BOE machine Name>
Auth Method: Enterprise

How to establish an Oracle connection between server1 and server2

I am trying to establish an Oracle connection between server1 and server2 specifically, while logged into server2 launch OEM on server1. Can anyone help me out here on establishing this connections between the 2 servers. thank you inadvance

I am assuming this is 10g.
Same way you connect from your desktop to the server using the URL (e.g http://server1:1158/em).
But you have to ensure that server2 can see server1. They cannot see each other, then it is not OEM problem.
if it is not 10g, then let me know

Connection between servers.

Similar Messages

Maybe you are looking for