The 7750 SR or 7450 ESS can block network control traffic for unconfigured protocols. For example, if OSPF is not configured on an IP interface, all OSPF- related traffic should be dropped before the traffic reaches the CPU.
Protocols are blocked based on whether that protocol is configured to run on the specific IP interface. It is not required to re-configure the permitted protocols.
Protocol traffic control by this mechanism includes:
OSPFv2
OSPFv3
IS-IS
RSVP-TE
LDP
RIP
PIM
MLD
IGMP
BGP
BFD
L2PT
PPP
DHCP