Hey, For NSH-aware SNAT case, a packet goes through below flow path: Rx on Phy interface -> .. -> nsh_plugin for tunnel decap -> Ethernet-input -> ... -> Tx to phy interface. It works well when this feature was merged before.
Recently, I ran into an issue when running NSH-aware SNAT case: When packets sent from nsh_tunnel to Ethernet-input node, ethernet_input_inline function will check packet's destination MAC with nsh_tunnel's interface MAC. But nsh_tunnel is a virtual interface and has no MAC address. It results in the failure of packets process. https://gerrit.fd.io/r/#/c/5718/ Add MAC address check in ethernet-input node if interface in L3 mode This bug fix was merged in VPP some days ago, which causes above failure. When I tried to configure the MAC address of nsh_tunnel, it has an error: DBGvpp# set interface mac address nsh_tunnel0 90:E2:BA:48:7A:80 set interface mac address: mac address change is not supported for interface index 4 We need to figure out a way to fix this issue. Thanks a lot, Hongjun
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