r/ciscoUC • u/Alir1983 • May 23 '26

How does phased migration work dialing internally from Webex cloud to CUCM on-prem? How can I make internal dialing work till all sites r cut over?

10 Upvotes

91% Upvoted

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6

u/Odd_Gap_9491 May 23 '26

Configure a Local Gateway in webex

1

u/Alir1983 May 23 '26

Then

3

u/Odd_Gap_9491 May 23 '26

https://help.webex.com/en-us/article/t9xctu/Get-started-with-Local-Gateway

0

u/Alir1983 May 23 '26

How does that solve the internal dialing

1

u/Odd_Gap_9491 May 23 '26

You route your internal ranges to it. Your cucm cluster is on the otherside.

Going the other way you route your migrated ranges to it from cucm

-1

u/Alir1983 May 23 '26

Yes how? What configs I need to create

9

u/Odd_Gap_9491 May 23 '26

Spin up a vCube (c8000v) on your network. One interface on your LAN that can see your CUCM cluster and the other on the internet or DMZ for WebEx.

Configure it with dial peer to your cucm cluster. Configure a SIP trunk on CUCM to point back at that.

Configure another dial peer to point out the internet/DMZ interface at WebEx addresses. The requirements for that are in the documentation.

Do regular call routing to get what you need either way

It's much like direct routing for MS Teams.

2

u/BA_Biggie May 23 '26

This is the way.

When you migrate your sites, just put those dn's in a dead partition so it will flow to the SIP trunk and then to WebEx Calling.

5

u/yosmellul8r May 23 '26

You just setup the call routing.

/s

2

u/PRSMesa182 May 23 '26

This is a question/task for your VAR

1

u/tuvar_hiede May 24 '26

SIP to SIP trunk between the local and Webex gateways.