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Home > Archive > Voice over IP Cisco > November 2005 > CCM Services Redundancy
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CCM Services Redundancy
|
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| Ruben Montes 2005-11-21, 7:45 am |
| Hello,
is it possible to make some kind of redundancy with the services activated in the CallManager?
We don't want to lose all this services when the server associated fail...
Thanks,
Ruben
| |
| Kevin Thorngren 2005-11-21, 7:45 am |
| Hi Ruben,
Depending on your configuration and needs there are many methods for =
configuring high availability with CCM. The CallManager SRND has many =
of these design guidelines. Please take a look and let us know if =
there are any questions.
http://www.cisco.com/en/US/products/sw/voicesw/ps556/ =
products_implementation_design_guide_boo
k09186a008044714e.html
Kevin
On Nov 21, 2005, at 5:19 AM, Ruben Montes wrote:
> Hello,
>
> is it possible to make some kind of redundancy with the services =
> activated in the CallManager?
>
> We don't want to lose all this services when the server associated =
> fail...
>
> Thanks,
>
> =A0
>
> Ruben
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Lelio Fulgenzi 2005-11-21, 5:45 pm |
| Re: [cisco-voip] CRS and IPCC express licensing rejectedMany of the services can be run on multiple subscribers to provide redundancy, however, there are some services that require access to the publisher. If the publisher goes down or the synchronization between the cluster is lost you will lose some services/features. I don't know if there is a full list, but it does include the forwarding of phones and extension mobility. Basically, any service that writes(?) to the database.
----- Original Message -----
From: Ruben Montes
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 5:19 AM
Subject: [cisco-voip] CCM Services Redundancy
Hello,
is it possible to make some kind of redundancy with the services activated in the CallManager?
We don't want to lose all this services when the server associated fail...
Thanks,
Ruben
------------------------------------------------------------------------------
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cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Ruben Montes 2005-11-21, 5:45 pm |
| Hello,
I'm refering to the services that can be accessed through the IP phone (directory, help, etc); all the URLs that are configured in the enterprise parameters option...
Regards,
Ruben
-----Mensaje original-----
De: Lelio Fulgenzi [mailto:lelio@uoguelph.ca]
Enviado el: lun 21/11/2005 17:13
Para: Ruben Montes
CC: cisco-voip@puck-nether.net
Asunto: Re: [cisco-voip] CCM Services Redundancy
Many of the services can be run on multiple subscribers to provide redundancy, however, there are some services that require access to the publisher. If the publisher goes down or the synchronization between the cluster is lost you will lose some services/features. I don't know if there is a full list, but it does include the forwarding of phones and extension mobility. Basically, any service that writes(?) to the database.
----- Original Message -----
From: Ruben Montes <mailto:Ruben.Montes@eu.didata.com>
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 5:19 AM
Subject: [cisco-voip] CCM Services Redundancy
Hello,
is it possible to make some kind of redundancy with the services activated in the CallManager?
We don't want to lose all this services when the server associated fail...
Thanks,
Ruben
_____
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Lelio Fulgenzi 2005-11-21, 5:45 pm |
| Re: [cisco-voip] CRS and IPCC express licensing rejectedAh - I see. There are several schools of thought there. By using IP address you eliminate the need and dependancy for DNS, however, if that server that you are pointing to goes down, then so does your service. By using DNS, you should be able to keep all those services up and running. I'm not sure about the DNS caching on a phone, so if a phone has already used a service and it goes to use the service again, will it re-request the DNS entry again or use what it has in cache? If so, does it time out? And if you figure this all out can you rely on it being the same in the next release of software?
I think the general concensus has been to go with IP addresses from what I've seen on the list.
----- Original Message -----
From: Ruben Montes
To: Lelio Fulgenzi
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 11:41 AM
Subject: RE: [cisco-voip] CCM Services Redundancy
Hello,
I'm refering to the services that can be accessed through the IP phone (directory, help, etc); all the URLs that are configured in the enterprise parameters option...
Regards,
Ruben
-----Mensaje original-----
De: Lelio Fulgenzi [mailto:lelio@uoguelph.ca]
Enviado el: lun 21/11/2005 17:13
Para: Ruben Montes
CC: cisco-voip@puck-nether.net
Asunto: Re: [cisco-voip] CCM Services Redundancy
Many of the services can be run on multiple subscribers to provide redundancy, however, there are some services that require access to the publisher. If the publisher goes down or the synchronization between the cluster is lost you will lose some services/features. I don't know if there is a full list, but it does include the forwarding of phones and extension mobility. Basically, any service that writes(?) to the database.
----- Original Message -----
From: Ruben Montes
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 5:19 AM
Subject: [cisco-voip] CCM Services Redundancy
Hello,
is it possible to make some kind of redundancy with the services activated in the CallManager?
We don't want to lose all this services when the server associated fail...
Thanks,
Ruben
--------------------------------------------------------------------------
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Ruben Montes 2005-11-21, 5:45 pm |
| So, if you're pointing to the IP addresses of the subscriber for example, you lose all this URL if it goes down, is that correct?
Has anybody tried to do some sort of load-balancing? SLB (server load balancing) for example with the http service in a CCM cluster?
-----Mensaje original-----
De: Lelio Fulgenzi [mailto:lelio@uoguelph.ca]
Enviado el: lun 21/11/2005 17:52
Para: Ruben Montes
CC: cisco-voip@puck-nether.net
Asunto: Re: [cisco-voip] CCM Services Redundancy
Ah - I see. There are several schools of thought there. By using IP address you eliminate the need and dependancy for DNS, however, if that server that you are pointing to goes down, then so does your service. By using DNS, you should be able to keep all those services up and running. I'm not sure about the DNS caching on a phone, so if a phone has already used a service and it goes to use the service again, will it re-request the DNS entry again or use what it has in cache? If so, does it time out? And if you figure this all out can you rely on it being the same in the next release of software?
I think the general concensus has been to go with IP addresses from what I've seen on the list.
----- Original Message -----
From: Ruben Montes <mailto:Ruben.Montes@eu.didata.com>
To: Lelio Fulgenzi <mailto:lelio@uoguelph.ca>
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 11:41 AM
Subject: RE: [cisco-voip] CCM Services Redundancy
Hello,
I'm refering to the services that can be accessed through the IP phone (directory, help, etc); all the URLs that are configured in the enterprise parameters option...
Regards,
Ruben
-----Mensaje original-----
De: Lelio Fulgenzi [mailto:lelio@uoguelph.ca]
Enviado el: lun 21/11/2005 17:13
Para: Ruben Montes
CC: cisco-voip@puck-nether.net
Asunto: Re: [cisco-voip] CCM Services Redundancy
Many of the services can be run on multiple subscribers to provide redundancy, however, there are some services that require access to the publisher. If the publisher goes down or the synchronization between the cluster is lost you will lose some services/features. I don't know if there is a full list, but it does include the forwarding of phones and extension mobility. Basically, any service that writes(?) to the database.
----- Original Message -----
From: Ruben Montes <mailto:Ruben.Montes@eu.didata.com>
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 5:19 AM
Subject: [cisco-voip] CCM Services Redundancy
Hello,
is it possible to make some kind of redundancy with the services activated in the CallManager?
We don't want to lose all this services when the server associated fail...
Thanks,
Ruben
_____
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Lelio Fulgenzi 2005-11-21, 5:45 pm |
| Re: [cisco-voip] CRS and IPCC express licensing rejectedThat is my understanding, yes.
----- Original Message -----
From: Ruben Montes
To: Lelio Fulgenzi
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 12:01 PM
Subject: RE: [cisco-voip] CCM Services Redundancy
So, if you're pointing to the IP addresses of the subscriber for example, you lose all this URL if it goes down, is that correct?
Has anybody tried to do some sort of load-balancing? SLB (server load balancing) for example with the http service in a CCM cluster?
-----Mensaje original-----
De: Lelio Fulgenzi [mailto:lelio@uoguelph.ca]
Enviado el: lun 21/11/2005 17:52
Para: Ruben Montes
CC: cisco-voip@puck-nether.net
Asunto: Re: [cisco-voip] CCM Services Redundancy
Ah - I see. There are several schools of thought there. By using IP address you eliminate the need and dependancy for DNS, however, if that server that you are pointing to goes down, then so does your service. By using DNS, you should be able to keep all those services up and running. I'm not sure about the DNS caching on a phone, so if a phone has already used a service and it goes to use the service again, will it re-request the DNS entry again or use what it has in cache? If so, does it time out? And if you figure this all out can you rely on it being the same in the next release of software?
I think the general concensus has been to go with IP addresses from what I've seen on the list.
----- Original Message -----
From: Ruben Montes
To: Lelio Fulgenzi
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 11:41 AM
Subject: RE: [cisco-voip] CCM Services Redundancy
Hello,
I'm refering to the services that can be accessed through the IP phone (directory, help, etc); all the URLs that are configured in the enterprise parameters option...
Regards,
Ruben
-----Mensaje original-----
De: Lelio Fulgenzi [mailto:lelio@uoguelph.ca]
Enviado el: lun 21/11/2005 17:13
Para: Ruben Montes
CC: cisco-voip@puck-nether.net
Asunto: Re: [cisco-voip] CCM Services Redundancy
Many of the services can be run on multiple subscribers to provide redundancy, however, there are some services that require access to the publisher. If the publisher goes down or the synchronization between the cluster is lost you will lose some services/features. I don't know if there is a full list, but it does include the forwarding of phones and extension mobility. Basically, any service that writes(?) to the database.
----- Original Message -----
From: Ruben Montes
Cc: cisco-voip@puck-nether.net
Sent: Monday, November 21, 2005 5:19 AM
Subject: [cisco-voip] CCM Services Redundancy
Hello,
is it possible to make some kind of redundancy with the services activated in the CallManager?
We don't want to lose all this services when the server associated fail...
Thanks,
Ruben
----------------------------------------------------------------------
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Kevin Thorngren 2005-11-21, 5:45 pm |
| You have a couple of options:
1. You can define a hostname in DNS with multiple IP Addresses then
configure the services URL with that hostname. If the phone fails to
connect to the first entry it will try the next. IIRC, the phone
supports up to 8 entries. You should test this to see if it works as
you expect and determine if the timeout delays between attempts are
acceptable.
2. This is a more robust option. You can use server load balancing to
point a virtual web address that is pointed to multiple servers in the
cluster.
Kevin
On Nov 21, 2005, at 11:41 AM, Ruben Montes wrote:
> Hello,
> _
> I'm refering to the services that can be accessed through the IP phone
> (directory, help, etc); all the URLs that are configured in the
> enterprise parameters option...
> _
> Regards,
> _
> Ruben
> _
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
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