REDUNDANCY OF TMS

Hello

One of our customers is to have a primary site and the recovery for the conferencing site. They are planning to implement redundant VC a componnents like VCS, conductor, MCU and TMS.

I need your expert opinion in the deployment of the TMS in the main Site and recovery Site scenario.

Primary site and recovery Site is in a totally different network. We cannot extend the primary IP address on the site of DR. Because of this redundant components will have the IP address to a different subnet.

TMS Server A: 10.10.10.10

TMS Server B DR Site: 10.20.20.20

DNS A record for TMS server is tms.example.com--> 10.10.10.10

I checked the options for redundancy of TMS, as shown in the link.

http://www.Cisco.com/en/us/docs/Telepresence/infrastructure/TMS/config_guide/Cisco_TMS_Server_Redundancy_Config_Guide_13-0.PDF

Fully redundant use the concepts of the load balancer.

I have the following questions.

1 could you please let me know what load balancer can be used for redundancy of TMS solution considering the IP address of the MSDS are in different subnets.

2. in several servers, manual failover option, if the failure of the principal server will we use 10.20.20.20 address IP Cisco TMS Server Local IPv4 address and update the DNS record to point to 10.20.20.20.

Krishna.

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Option a.

I would not recommend an A DNS record pointing at a time... since it is essentially a round robin... which means that if DC 1 is down, you will get a search on the second, it will just fail. Therefore, I would recommend you do is just enter a DNS record for the DC 1 TMS and if you get a failure on DC 1, then simply go to DNS and to update IP address for this record to the DC 2 TMS.

Option B

No, you don't want to do this, i.e. Add the EPs for the two TMS initially. You only want to add systems to the DC 1 TMS... which means a TMS db to "govern together." And that's why your "asynchronous mirroring ' the TMS of DC db SQL to CC 1 2 SQL." And specify "async mirrroring in SQL", when you set the "async mirroring" in SQL, a db is 'active', while the other is "passive". That's why on the DC 2 TMS all services of TMS needs for people with reduced mobility because it cannot connect to the TMS SQL db (tmsng), which is passive. And with "async mirrored" on and how often you 'mirror', the basics of data will actually be the same.

At the end of the day, the deployment is not that big (20 systems) so all this may seem "exaggerated", but it is the approach to 2 x installation DC... unless of course you virtualize everything and go Nick road, i.e. the Group OTV and strecthed.

Rgds,

Dale

Tags: Cisco Support

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