BranchCache implications for VPN

Eleven Yu (Shanghai Wicresoft Co,.Ltd.) 10,756 Reputation points Microsoft Vendor
2020-07-15T06:45:32.977+00:00

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Hi
We're looking at implementing Branchcache in Distributed Mode for use with SCCM(Current Branch).
One of our concerns around doing this is: what effect does Branchcache have when our mobile users enable their Cisco AnyConnect VPN connection? 
I've found the following thread which indicates that "BranchCache is compatible with VPN software that supports split tunneling."
https://social.technet.microsoft.com/Forums/en-US/ea16f03a-a7a6-4209-8958-011eaf1320ad/branch-cache-on-vpn?forum=windowsserver2008r2branchoffice
How are other Engineers managing BranchCache for VPN enabled clients? - Real world experiences? Best practice?
Can we exclude the VPN subnet from being Branchcache enabled? If so, how do we do that?
Any advice would be much appreciated.
Thanks

TechNet forum original post link:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/f7a5dcca-08ab-4a81-a84a-2a8175771934/branchcache-implications-for-vpn?forum=windowsserver2008r2branchoffice

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  1. Andy YOU 3,076 Reputation points
    2020-07-15T08:22:07.597+00:00

    Welcome to our new Microsoft Q&A Platform.

    hi,

    BranchCache in distributed mode depends on multicast for discovery, and the packets have a TTL of 1 - so usually they would not be forwarded to other clients that are on VPN. CISCO VPN client doesn't support multicast traffic.

    So BranchCache would attempt to do Peer to Peer but fail over to BITS and download from the DP in SCCM.

    cheers

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