Expressway MRA Single NIC deployment Inquiry

[Ralph John Tampilic]

Hi All,

Blessed day! May we know if there has documented guide for the deployment of Expressway Single NIC for MRA setup? 

Thank you.

Regards,

Ralph

[Adam Pawlowski]

Hi Ralph,

It follows the same as the traditional Expressway deployment with a Single NIC. Namely, as far as I am aware (and I am no pro) that means a Public IP or NAT reflection, a public FQDN, and calls will invoke the B2BUA which results in some additional resource utilization.

I use MRA with a single NIC, no reflection, public IP/FQDN, and it works just fine, but, your environment may vary.

[Ralph John Tampilic]

Hi Adam,

Thanks for your reply.
We have successfully configured this setup using NAT reflection. However, we have experiencing issue on login as we have different two domains (for example):
External DNS - domain.ph
Internal DNS - domain.com, domain.ph

From Core, the services: _cisco-uds._tcp.domain.com and _cisco-uds._tcp.domain.ph / _cuplogin._tcp.domain.com and _cuplogin._tcp.domain.ph was already resolvable to cucm.domain.com.

We have also uploaded jabber-config.xml on all CUCM TFTP.
Try to login first internal user@domain.com and it was successful. Then connect to external/public, can login but phone services not available. We have also try to sign out first before connect via public but same issue.

Hope you can help on this.

Thank you.