We run HSRP and OSPF on our network. When I do a network sniff from a client, I can see the HSRP multicast traffic, and I can also see the OSPF advertisements.
Is it possible to filter these packets off client interfaces?
What's the best way of doing this?
You can configure multicast blcoking on individual ports on your switch - see attached link for configuration example.
I have not actually used this feature so i would suggest testing it if you can before implementing it on to a live system. Be aware that it blocks all multicast so only you will know whether this is acceptable or not.
Let me know how you get on