[cisco-voip] Expressway MRA question

[Ahmed Abd EL-Rahman]

Also if the Expressway supports working with multiple CUCM/IMP clusters, how can it determine to which cluster it will direct the user client registration request ?



Also as mentioned there is single DNS and single domain for the whole 4 clusters, so how the SRV records will be added for service discovery specially from inside the company to direct each user to its correct cluster?



For example, this is one of the SRV records that should be added to the internal DNS and answers the queries with CUCM IP address: (_cisco-uds._tcp.domain.com), so how such record will work properly to direct each user request to its own cluster CUCM if all 4 clusters are having the same DNS system and same domain ?







Best Regards

Ahmed Abd EL-Rahman
Senior Network Engineer



Hi James,



Yes currently all the 4 clusters' users can talk to each others via inter-cluster trunks over WAN links.



Kindly if you have any documents explaining such setup please share it with me.



Appreciated.









BR

Ahmed Abd EL-Rahman

Senior Network Engineer



Sent from my iPhone



On Mar 12, 2017, at 5:51 PM, James Buchanan <james.buchanan2 at gmail.com<mailto:james.buchanan2 at gmail.com<mailto:james.buchanan2 at gmail.com%3cmailto:james.buchanan2 at gmail.com>>> wrote:



Hello,



It is indeed possible. You use one cluster as a sort of "hub" cluster. Then, just make sure the users in each cluster have the Home Cluster parameter checked, but make sure it is only checked in one cluster. Also, you have to make sure you are using ILS and have peer links in IM&P between all the clusters. If all the Jabber users can talk to each other today in all the various clusters, then you're already grand for using Expressway in that scenario.



Thanks,



James



On Sun, Mar 12, 2017 at 10:30 AM, Ahmed Abd EL-Rahman <Ahmed.Rahman at bmbgroup.com<mailto:Ahmed.Rahman at bmbgroup.com<mailto:Ahmed.Rahman at bmbgroup.com%3cmailto:Ahmed.Rahman at bmbgroup.com>>> wrote:

Hi Gents,



If we have 4 standalone clusters each of them has its own CUCM and IM&P servers (version 11.5), I'd like to know if it's possible to have only 1 Expressway C and E system to serve all the 4 cluster with MRA service ?



Taking into consideration that all the 4 clusters are using the same DNS system and same domain name (company.com<http://company.com>).













Best Regards



Ahmed Abd EL-Rahman

Senior Network Engineer





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