Routing - redistribute command

When configuring routing on a Cisco router, the redistribute command is used by many routing protocols, including EIGRP, OSPF, and BGP, to allow routes learned from one source to be advertised by another.

The redistribute command has several options for the source of the redistribution. Take a look at the following context sensitive help. In this particular case, we are configuring redistribution into the existing EIGRP process of the router:

R1(config)#router eigrp 1
R1(config-router)#redistribute ?
  bgp        Border Gateway Protocol (BGP)
  connected  Connected
  eigrp      Enhanced Interior Gateway Routing Protocol (EIGRP)
  isis       ISO IS-IS
  lisp       Locator ID Separation Protocol (LISP)
  mobile     Mobile routes
  odr        On Demand stub Routes
  ospf       Open Shortest Path First (OSPF)
  rip        Routing Information Protocol (RIP)
  static     Static routes
  vrf        Specify a source virtual routing/forwarding instance

R1(config-router)#redistribute 

The source of the redistribution can be any of those sources listed above. In particular, notes the following sources:

• Connected - This redistributes directly connected networks, that is, those networks defined by the IPv4 or IPv6 addresses and subnet masks (or prefixes) of the configured and active interfaces on the router. For more details, take a look at the the difference between the network and redistribute connected commands.
• Static - This keyword will allow you to redistribute any static route that has been configured on the local router using the ip route or ipv6 route commands.

Links:

https://www.cisco.com/c/en/us/td/docs/ios/iproute_pi/command/reference/iri_book/iri_pi1.html#wp1034551

https://forum.networklessons.com/t/ip-routing-explained/1472/57?u=lagapidis