Let me guess...are using EIGRP on you network?????
224.0.0.10 is the multicast adderss EIGPR uses for the Hello packets it sends to other routers. I would also think if you have a default configuration these packets are sent every 5 seconds on a LAN and 60 seconds over WAN links.
Also remember that class D IP ranges start at 224 to 239.
An ARIN search on the other IP'S are as follows:
OrgName: Internet Assigned Numbers Authority
OrgID: IANA
Address: 4676 Admiralty Way, Suite 330
City: Marina del Rey
StateProv: CA
PostalCode: 90292-6695
Country: US
NetRange: 224.0.0.0 - 239.255.255.255
CIDR: 224.0.0.0/4
NetName: MCAST-NET
NetHandle: NET-224-0-0-0-1
Parent:
NetType: IANA Special Use
NameServer: FLAG.EP.NET
NameServer: STRUL.STUPI.SE
NameServer: NS.ISI.EDU
NameServer: NIC.NEAR.NET
Comment: This block is reserved for special purposes.
Comment: Please see RFC 3171 for additional information.
Comment:
RegDate: 1991-05-22
Updated: 2002-09-16
As for those IPs they are also listed as multicast addresses. See the link that follows
And as for you question of how to stop these... you do not want to stop, delay or hinder this multicast addresses...it would cause your routers to lose their neighbor relationships and you network would come to a halt.
Hope this helps
SF18C
CCNA, MCSE, A+, N+ & HPCC
"Tis better to die on your feet than live on your knees!"