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diff --git a/src/plugins/avf/README.md b/src/plugins/avf/README.md
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+++ b/src/plugins/avf/README.md
@@ -82,6 +82,16 @@ trust needs to be set to "on" using the linux "ip link" utility.
ip link set dev <PF inteface name> vf <VF id> trust on
```
+### L2 spoofing check
+By default Virtual Function is not allowed to send ethernet frames which
+have source MAC address different than address assigned to the VF.
+In some cases it is expected that VPP will send such frames (e.g. L2 bridging,
+bonding, l2 cross-connect) and in such cases spoof chack needs to be turned
+off by issuing following command:
+```
+ip link set dev <PF inteface name> vf <VF id> spoofchk off
+```
+
### Interface Creation
Interfaces can be dynamically created by using following CLI:
```