if HIPS shows this you have two options.
1) you can configure the handling on non supported ip protocols. This can be enabled or disabled.
2) Configure a rule where you con figure an user defined protocol with the protocol number 0x1a1.
If you look for information information about protocol number 0x1a1 there are several useful links available.
Moved from Security Awareness to EndPoint Security > Host Intrusion Prevention > Discussions for better assistance. If needed to be moved to (VSE) please apprise.