EIGRP Redistribution Question

[AlessandroAlise]

Hy Guys, i have a problem with Redistribution in EIGRP, this is Topology:

R1 has attached the subnet 192.168.100/24,192.168.10/24, 192.168.20/24 and 10.0.0.0/30
R2 has attached the subnet 192.168.200/24,192.168.50/24, and 10.0.0.0/30
R1 and R2 are in the same Routing Domain EIGRP 12, the adjacency is UP, this is configuration of EIGRP:

R1:

router eigrp 12
network 10.0.0.0 0.0.0.3
passive-interface GigabitEthernet0/0
distribute-list route-map PERMITTED out
eigrp router-id 1.1.1.1

EIGRP-IPv4 Neighbors for AS(12)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 10.0.0.2 Gi0/1 13 00:27:52 1 100 0 52

R2:

router eigrp 12
network 10.0.0.0 0.0.0.3
passive-interface GigabitEthernet0/0
eigrp router-id 2.2.2.2

EIGRP-IPv4 Neighbors for AS(12)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 10.0.0.1 Gi0/1 10 00:28:09 1 100 0 20

This is

Prefix-List

and

Route-Map

for redistribution from R1 to R2:

ip prefix-list PERMIT seq 10 permit 192.168.10.0/24
ip prefix-list PERMIT seq 20 permit 192.168.100.0/24

route-map PERMITTED permit 10
match ip address prefix-list PERMIT
route-map PERMITTED deny 20

But R1 does not advertise the subnets contained in the

prefix-list

 PERMITTED.

Why?

Maybe because the network 192.168.0.0 0.0.255.255 is missing within the EIGRP process?

I understood that the

route-map

also regulates the interfaces participating in the EIGRP process, am I wrong?

Thx

[MHM Cisco World]

what is R1-SW1 link config ??

[AlessandroAlise]

Thanks for your help.

The interface on R1
interface GigabitEthernet0/0
no ip address
full duplex
speed auto
media-type rj45

The interface on SW1:
interface GigabitEthernet0/0
description R1
switchport trunk encapsulation dot1q
switchport mode trunk
negotiation auto

Interface GigabitEthernet0/0 on R1

is configured as passive to not be able to send/receive Hello packets.

[MHM Cisco World]

that what I guess first time, 

show ip route 

you will see only 10.0.0.0/30, other prefix behind the SW not learn from R1 and hence R1 can not advertise it.

you need to config link R1 subinterface (one subinterface for each VLAN). 

Note:- apply it to both Side R1 and R2

[AlessandroAlise]

i know, i've configured subinterface for alla VLAN,

this is sh ip route or R1:
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.0.0.0/30 is directly connected, GigabitEthernet0/1
L 10.0.0.1/32 is directly connected, GigabitEthernet0/1
192.168.10.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.10.0/24 is directly connected, GigabitEthernet0/0.10
L 192.168.10.1/32 is directly connected, GigabitEthernet0/0.10
192.168.20.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.20.0/24 is directly connected, GigabitEthernet0/0.20
L 192.168.20.1/32 is directly connected, GigabitEthernet0/0.20
192.168.100.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.100.0/24 is directly connected, GigabitEthernet0/0.100
L 192.168.100.1/32 is directly connected, GigabitEthernet0/0.100

This is sh ip route on R2:
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.0.0.0/30 is directly connected, GigabitEthernet0/1
L 10.0.0.2/32 is directly connected, GigabitEthernet0/1
192.168.50.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.50.0/24 is directly connected, GigabitEthernet0/0.50
L 192.168.50.1/32 is directly connected, GigabitEthernet0/0.50
192.168.200.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.200.0/24 is directly connected, GigabitEthernet0/0.200
L 192.168.200.1/32 is directly connected, GigabitEthernet0/0.200

[MHM Cisco World]

OMG we miss the first step in any routing protocol 

router eigrp 12
network 10.0.0.0 0.0.0.3
redistribute connected <<- need this friend only or add each prefix with network command  
passive-interface GigabitEthernet0/0
distribute-list route-map PERMITTED out
eigrp router-id 1.1.1.1

route-map

after you add prefix will filter it, permit some and deny other 

[AlessandroAlise]

Yes, i know we can use the command too  :
redistribute connected

route-map

PERMITTED
It's work!
But I was convinced that with

route-map

I could redistribute as many prefixes as I wanted even if they weren't connected

[MHM Cisco World · Accepted solution]

redistribute connect 
then use 

distribute-list

 redistribute connected will add all prefix connect to EIGRP topology 
and you only distribute some of them to other peer. 
check my above comment I use both commend 

[AlessandroAlise]

Yes it's work!

[AlessandroAlise]

This is NOW the

sh ip route on R2

D EX 192.168.10.0/24 [170/3072] via 10.0.0.1, 00:07:40, GigabitEthernet0/1
D EX 192.168.100.0/24 [170/3072] via 10.0.0.1, 00:07:40, GigabitEthernet0/

Another question, why the AD of this Prefix is 170? Like a Route learn External EIGRP?
I expected the learned routes to be internal with AD90!

[MHM Cisco World]

the EIGRP as you know have two AD 90 and 170 
but why 170 ?
answer is the R1 see the redistribute connect prefix as external so it give it 170 
you can change the behave by use network command instead of redistribute connect. and the prefix will be 90.

[AlessandroAlise]

ok, i don't know that all prefix redistributed with redistributed connected command, they have AD170.
Thanks for everything!

[MHM Cisco World]

You are so so welcome. 

[Richard Burts · Accepted solution]

Another way to look at this is that in the original configuration R1 in its routing table did know about networks 192.168.10.0 and 192.168.100.0 but eigrp on R1 did NOT know about those networks. If R1 does not know about the networks then it can not advertise those networks to R2. There are 2 ways for eigrp to know about the networks. One way is to use network statements for the 2 networks. When you use network statements then eigrp will advertise the networks as Internal networks. The other way for eigrp to know about the networks is to redistribute connected. When you redistribute connected then eigrp advertises the subnets as External networks.

[AlessandroAlise]

Thanks.