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Cisco Bug: CSCvv26201 - MS-TEAMS-MEDIA UDP port mapping should be adjusted to be identified properly by AVC

Last Modified

Aug 07, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

8.10(121.0)

Description (partial)

Symptom:
As of now (NBAR2 PP40) AVC will work on the WLC for MS-TEAMS-MEDIA when it uses UDP port 3478. But this is what is required from MS-TEAMS to work properly:

"Teams requires connectivity to the Internet. Teams endpoint URLs and IP address ranges are listed in Office 365 URLs and IP address ranges. (Note that open connectivity to TCP ports 80 and 443, and to UDP ports 3478 through 3481, is required.) Furthermore, Teams has a dependency on Skype for Business Online, which must also be connected to the Internet."
Connectivity to Microsoft 365 or Office 365:
https://docs.microsoft.com/en-us/microsoftteams/microsoft-teams-online-call-flows

NBAR2 PP40.0 (MS-TEAMS-MEDIA):
https://www.cisco.com/c/en/us/td/docs/wireless/controller/nbar2_prot_pack/40-0-0/nbar-prot-pack4000/nbar-prot-pack4000_chapter_01100.html?bookSearch=true#wp3589249721

- We need to add ports UDP 3478 through 3481 for AVC to classify MS-TEAMS-MEDIA properly

Conditions:
- WLC image: 8.10.121.0
- NBAR2 PP40.0
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