The EIGRP RID is a 32-bit number in dotted decimal format. In EIGRP, duplicate RIDs do not prevent routers from becoming neighbors and two EIGRP routers with the same router ID will still form a neighbor relationship. The only time the value of EIGRP RIDs consider is when injecting external (…
Blog posts : "EIGRP OSPF RIP Notes"
In RIP passive-interface command will disable sending multicast updates via a specific interface but will allow listening to incoming updates from other RIP speaking neighbors.
R1# router rip
R1# passive-interface fa0/0
Command to see list of passive-interfaces
R1# show ip protocols
|TELNET, HTTP, HTTPS, FTP, SMTP, BGP, POP3, IMAP, NFS.||DHCP, TFTP, DNS, RIP, SNMP, VOIP.|
|Type||Distance Vector||Advanced Distance Vector||Link state|
|Subnet Mask||Classfull (By Default)||Classfull (By Default)||Classless|
|Algorithm||Bellman-Ford||Diffusing Update (DUAL)||Di…|