Redistribute static route into EIGRP
In an inter-network environment, normally you have a single
routing-protocol for ease of controlling your network. But when you are
connecting the multiple networks, branch office with each other then there may
be the different routing protocol.
Route Redistribution permits routes from one
routing-protocol to be advertised in-to another routing-protocol. The routing
protocol which receives these redistributed-routes are normally marked the
routes as external-routes. External-routes are generally less preferred than
locally originated-routes.
You can redistribute routes from one routing protocol to
same routing protocol, like two separate OSPF with different process ID’s.
Redistribute static route into EIGRP
Similarly you can redistribute static routes and connected
interfaces into a routing protocol as well. This article is about the
redistributing the static routes into EIGRP process. For simplicity and clear
understanding I have designed a lab in GNS3.
Lab Objectives
We have three routers R1, R2 and R3. R1 and R3 are running
with EIGRP and our objective is to
redistribute the static routes from R2 into EIGRP so that these can be available
at R3 as external routes.
I have configured this lab on GNS3 with following
configurations:
Configurations on R2
R2(config)#interface f0/0
R2(config-if)#ip address 50.0.0.1 255.255.255.0
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#interface loopback 1
R2(config-if)#ip address 10.10.10.1 255.255.255.0
R2(config-if)#interface loopback 2
R2(config-if)#ip address 20.10.10.1 255.255.255.0
R2(config-if)#interface loopback 3
R2(config-if)#ip address 30.10.10.1 255.255.255.0
R2(config-if)#interface loopback 4
R2(config-if)#ip address 40.10.10.1 255.255.255.0
Configuration of
static routes for not directly connected routes:
For static route configurations you are required to advertise
destination network with next hop address via static route command as
following:
R2(config)#ip route 150.0.0.0 255.255.255.0 50.0.0.2
R2(config)#ip route 100.10.10.0 255.255.255.0 50.0.0.2
R2(config)#ip route 200.10.10.0 255.255.255.0 50.0.0.2
Configurations on R3
R3(config)#int f0/0
R3(config-if)#ip address 150.0.0.2 255.255.255.0
R3(config-if)#no shut
R3(config)#int loopback 1
R3(config-if)#ip address 100.10.10.1 255.255.255.0
R3(config-if)#exit
R3(config)#int loopback 2
R3(config-if)#ip address 200.10.10.1 255.255.255.0
R3(config-if)#exit
R3(config)#router eigrp 10
R3(config-router)#network 150.0.0.0 0.0.0.255
R3(config-router)#network 100.10.10.0 0.0.0.255
R3(config-router)#network 200.10.10.0 0.0.0.255
Configurations on R1
R1(config)#int f1/0
R1(config-if)#ip address 50.0.0.2 255.255.255.0
R1(config-if)#no shutdown
R1(config)#interface fastEthernet 0/0
R1(config-if)#ip address 150.0.0.1 255.255.255.0
R1(config)#router eigrp 10
R1(config-router)#network 150.0.0.0 0.0.0.255
R1(config-router)#network 50.0.0.0 0.0.0.255
R1(config)#ip route 10.10.10.0 255.255.255.0 50.0.0.1
R1(config)#ip route 20.10.10.0 255.255.255.0 50.0.0.1
R1(config)#ip route 30.10.10.0 255.255.255.0 50.0.0.1
R1(config)#ip route 40.10.10.0 255.255.255.0 50.0.0.1
Static Routes redistribution into EIGRP Configurations
For Static Routes redistribution into EIGRP you need to
permit all the static routes with a route map which you want to redistribute
into EIGRP. For this you are required a access-list with all IP which are going
to redistribute in EIGRP.
R1(config)#access-list 7 permit 10.10.10.1
R1(config)#access-list 7 permit 20.10.10.1
R1(config)#access-list 7 permit 30.10.10.1
R1(config)#access-list 7 permit 40.10.10.1
R1(config)#route-map static-to-eigrp permit 10
R1(config-route-map)#match ip address 7
Redistribution
Commands:
R1(config)#router eigrp 10
R1(config-route-map)# R1(config-router)#redistribute
static route map static-to-eigrp
R1(config-route-map)# R1(config-router)#redistribute
static metric 10000 1 255 1 1500 (not compulsory in case of static routes)
Testing and
verification of configurations:
After the successful configurations you will find the static
routes in R3’s routing table as the external routes:
Network 10.10.10.0, 20.10.10.0, 30.10.10.0 and 40.10.10.0
are the interfaces configured at R1 and after complete configuration you can
find these routes in R3 routing table.
You can also perform an end to end ping for testing. Following
are some other redistribution labs you can visit these as reference and learning.
- Route redistribution RIP into OSPF And OSPF into RIP
- EIGRP Redistribution of Different AS
- EIGRP OSPF Redistribution
