11-19-2015 04:16 AM - edited 03-19-2019 10:23 AM
Hello everyone,
We are deploying a BE6000S for our office (less than 30 users), and currently we are using internet service provider router as our DNS, and don't have access to make changes.
Would deploying the BE6000S without a proper DNS server affect it's performance in this scenario?
11-19-2015 04:46 AM
If you are using Jabber, then FQDNs are needed and this obviously would require DNS.
I’ll ask around for other DNS dependencies from the BE6000S apps suite (PCP, UCM, CUC, IMP, Paging).
For at least UCM/IMP they would be called out in the design guides and Preferred Architectures at www.cisco.com/go/srnd<http://www.cisco.com/go/srnd> , but that’s a lot of content to go through.
-james
11-19-2015 05:48 AM
Hi Jarias,
Thanks for your response. Kindly pass me any further updates you get about the other servers.
I already read the SRND document and other documents what I got on DNS is that it’s optional. But I’m not exactly sure what services will be impacted if I don’t use it.
Thanks,
Emmanuel
11-19-2015 12:07 PM
Additional info from the Technical Marketing Engineers...
So extremely basic deployments may not need DNS, but as you add capabilities it starts to become necessary.
-james
11-19-2015 12:26 PM
Hi All,
Just to add to James' responses. If you are using the BE6000S preconfigured images, then you will need DNS (the applications have been configured to look for DNS services at 172.27.199.5). You don't necessarily need to configure anything though, as the ISR has been configured to provide these services for the collaboration applications.
Andy
11-19-2015 12:32 PM
So ISR can be a DNS Server? I don’t need Cisco Network Registrar or “the server team’s” DNS?
Why wouldn’t partners just use any old router as a DNS server to keep it in the family?
-james
11-19-2015 12:43 PM
Hi James,
IOS can certainly provide the functionality required for the applications to work (i.e. it can provide both forward and reverse resolution) and it could probably do this comfortably for a small deployment. I won’t suggest that IOS should be used for more formal corporate name server requirements though.
Andy
11-19-2015 01:09 PM
Makes sense. We get queries all the time about where the line should be drawn between “basic DNS” (handle via voice/video team using ISR or other Cisco DNS source) vs. “advanced DNS” (handle via the company’s ‘regular’ DNS environment … more robust but can also be more complex to integrate to or sustain).
-james
11-27-2015 09:55 AM
Hi Jarias,
I'm trying to install the apps on BE6000S, but I am getting a DNS error for UCM. From the ISR config, I see
ip host ntp.ciscolocal.com 172.27.199.1
ip host pcp.ciscolocal.com 172.27.199.10
ip host plm.ciscolocal.com 172.27.199.11
ip host ucm-pub.ciscolocal.com 172.27.199.11
ip host ucn1.ciscolocal.com 172.27.199.12
ip host imp1.ciscolocal.com 172.27.199.13
so I us "ucm-pub" as the CUCM name. There is an error message which indicates that the name I am using for the address 172.27.199.11 doesn't correspond with the name in DNS.
Do you have an idea on where the issue could be coming from?
Thanks
11-27-2015 01:52 PM
Hi,
If you are reinstalling the applications on the BE6000S, then I expect you are using using your own IP addressing and/or domain name.
You have two options here - either update the IOS configuration to correctly reflect your environment i.e.
ip host <your UCM host name>.<your DNS domain> <your UCM IP address>
Remove the host entries that aren't required:
no ip host ucm-pub.ciscolocal.com 172.27.199.11
Alternatively, use your own DNS server if you already have one and direct UCM to this during installation. When creating host records for the applications in your name server, don't forget to create reverse pointer records for each as these are required to complete the installation.
Andy
11-27-2015 02:07 PM
Hello,
I intend to use the pre-configured settings on the BE6000S, as I'm not using a DNS server. I'm not sure if the applications have been completely installed, as I am adviced to proceed with installation upon hovering over the applications in vSphere.
This is also the procedure in the installation guide
11-27-2015 02:43 PM
Ok - the applications are actually fully installed on delivery. Completing the install just resets the passwords to your preference.
When specifically are you seeing the DNS error?
Andy
11-28-2015 04:12 AM
Hi,
Here is a Screen short from when I hover on the CUCM app. Now I can't get to the where I hard the DNS error, as I am asked to restart the install. It comes to the same page (dump diagnostices) when I try to restart.
I guess I have to download the OVA and lunch the a fresh installation? or is it possible to reset the preloaded CUCM.
11-28-2015 04:14 AM
The DNS error comes within the blue installation screen, when it is doing the network check
11-29-2015 05:40 AM
Ah - I see. This is an export unrestricted BE6000S. These did not have fully installed applications until very recently - now I see why you were going through the install process... that would be expected in this case.
I'm not sure why the install is failing though. The IOS configuration would be the same in either case, so provided you either followed the IP address plan used for the preconfigured images (172.27.199.x etc refer to this document) when installing the applications, or adjusted the IOS configuration to suit your own addressing, things should be ok.
It is important that the network services are all properly configured before starting the application install though.
If you would like to reinstall the applications from scratch, the install files are available in the hypervisor datastore.
If you would like to use the preconfigured images, unrestricted versions are now available through software center here.
Andy
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