Thank you for the URL. From

MOHAMMED SALMAN · ‎04-18-2017

Hi All,

I am practicing EIGRP lab and got into an issue with EIGRP neighbourship. The neighbor comes up and then goes down. It flaps. When it is up I tried to look at the routes but the routes are not learnt either.

Below is the debug and other output from the router and even the topology is attached. Please let me know if something else is also needed.

TOP_ROUTER#
*Apr 18 13:39:48.931: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is down: retry limit exceeded
TOP_ROUTER#
*Apr 18 13:39:53.495: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is up: new adjacency

TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#

TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
*Apr 18 13:41:13.007: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is down: retry limit exceeded
TOP_ROUTER#
TOP_ROUTER#
*Apr 18 13:41:17.539: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is up: new adjacency
TOP_ROUTER#
TOP_ROUTER#sho ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override

Gateway of last resort is 172.16.150.1 to network 0.0.0.0

S* 0.0.0.0/0 [254/0] via 172.16.150.1
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 10.24.0.0/24 is directly connected, FastEthernet0/0
L 10.24.0.1/32 is directly connected, FastEthernet0/0
C 10.24.2.0/24 is directly connected, FastEthernet0/0.2
L 10.24.2.1/32 is directly connected, FastEthernet0/0.2
C 10.24.5.0/24 is directly connected, FastEthernet0/0.5
L 10.24.5.1/32 is directly connected, FastEthernet0/0.5
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.150.0/24 is directly connected, FastEthernet1/0
L 172.16.150.130/32 is directly connected, FastEthernet1/0
TOP_ROUTER#

TOP_ROUTER#debug ip eigrp 1 neighbor
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#

TOP_ROUTER#
*Apr 18 13:45:27.219: EIGRP: Retransmission retry limit exceeded
*Apr 18 13:45:27.223: EIGRP: Holdtime expired
*Apr 18 13:45:27.223: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is down: retry limit exceeded
TOP_ROUTER#
*Apr 18 13:45:27.223: Going down: Peer 10.24.0.2 total=0 stub 0, iidb-stub=0 iid-all=0
*Apr 18 13:45:27.223: EIGRP: Handle deallocation failure [0]
*Apr 18 13:45:27.223: EIGRP: Neighbor 10.24.0.2 went down on FastEthernet0/0
TOP_ROUTER#
*Apr 18 13:45:32.055: EIGRP: New peer 10.24.0.2
TOP_ROUTER#
*Apr 18 13:45:32.055: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is up: new adjacency
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
*Apr 18 13:46:51.563: EIGRP: Retransmission retry limit exceeded
*Apr 18 13:46:51.567: EIGRP: Holdtime expired
*Apr 18 13:46:51.567: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is down: retry limit exceeded
TOP_ROUTER#
*Apr 18 13:46:51.567: Going down: Peer 10.24.0.2 total=0 stub 0, iidb-stub=0 iid-all=0
*Apr 18 13:46:51.567: EIGRP: Handle deallocation failure [0]
*Apr 18 13:46:51.567: EIGRP: Neighbor 10.24.0.2 went down on FastEthernet0/0
*Apr 18 13:46:52.567: EIGRP: New peer 10.24.0.2
TOP_ROUTER#
*Apr 18 13:46:52.567: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 10.24.0.2 (FastEthernet0/0) is up: new adjacency
TOP_ROUTER#

TOP_ROUTER#u all
All possible debugging has been turned off

Diana Karolina Rojas · ‎04-18-2017

Hello!

What is your "system mtu routing" in your routers?

As of Cisco bug ID CSCsc72090, the EIGRP also uses the IP MTU settings of the interface. Before this fix was applied, the EIGRP packets would become fragmented if the IP MTU was configured with a value that was lower than 1,500.

Regards,

MOHAMMED SALMAN · ‎04-18-2017

Hi Diana,

Thank you for your response.

I checked on the interface and could see MTU as 1500. I hope this is what you are looking for.

Please let me know the command if you are looking for something else.

Regards,

Mohamed Salman

Julio E. Moisa · ‎04-18-2017

Hi

Could you please provide the routing table from both routers, show ip protocols and if it is not on production can you execute: debug eigrp packets

>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

MOHAMMED SALMAN · ‎04-18-2017

Awesome!!!! the debug seems to have helped to at least understand that the "UPDATE" packet is not reaching the R3 device.

Note: ICMP is also not successful.

================================================R1==========================================

TOP_ROUTER#sho ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override

Gateway of last resort is 172.16.165.1 to network 0.0.0.0

S* 0.0.0.0/0 [254/0] via 172.16.165.1
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 10.24.0.0/24 is directly connected, FastEthernet0/0
L 10.24.0.1/32 is directly connected, FastEthernet0/0
C 10.24.2.0/24 is directly connected, FastEthernet0/0.2
L 10.24.2.1/32 is directly connected, FastEthernet0/0.2
C 10.24.5.0/24 is directly connected, FastEthernet0/0.5
L 10.24.5.1/32 is directly connected, FastEthernet0/0.5
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.165.0/24 is directly connected, FastEthernet1/0
L 172.16.165.130/32 is directly connected, FastEthernet1/0
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#sho ip pro
*** IP Routing is NSF aware ***

Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
Redistributing: static
EIGRP-IPv4 Protocol for AS(1)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
NSF-aware route hold timer is 240
Router-ID: 10.24.5.1
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 4
Maximum hopcount 100
Maximum metric variance 1

Automatic Summarization: disabled
Maximum path: 4
Routing for Networks:
10.24.0.0/24
10.24.2.0/24
10.24.5.0/24
Passive Interface(s):
FastEthernet0/0.2
FastEthernet0/0.5
Routing Information Sources:
Gateway Distance Last Update
10.24.0.2 90 00:01:03
Distance: internal 90 external 170

TOP_ROUTER#debug ip eigrp pack
TOP_ROUTER#debug eig
TOP_ROUTER#debug eigrp pack
TOP_ROUTER#debug eigrp packets
(UPDATE, REQUEST, QUERY, REPLY, HELLO, UNKNOWN, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)
EIGRP Packet debugging is on
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
TOP_ROUTER#
*Apr 18 18:36:24.503: EIGRP: Sending UPDATE on Fa0/0 - paklen 0 nbr 10.24.0.2, retry 9, RTO 5000 tid 0
*Apr 18 18:36:24.511: AS 1, Flags 0x1:(INIT), Seq 5/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
TOP_ROUTER#
*Apr 18 18:36:26.371: EIGRP: Sending HELLO on Fa0/0 - paklen 20
*Apr 18 18:36:26.371: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0
TOP_ROUTER#
*Apr 18 18:36:27.559: EIGRP: Received HELLO on Fa0/0 - paklen 20 nbr 10.24.0.2
*Apr 18 18:36:27.563: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
TOP_ROUTER#
*Apr 18 18:36:28.363: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on FastEthernet0/0 (not half duplex), with IOU1 Ethernet1/0 (half duplex).
TOP_ROUTER#
*Apr 18 18:36:29.515: EIGRP: Sending UPDATE on Fa0/0 - paklen 0 nbr 10.24.0.2, retry 10, RTO 5000 tid 0
*Apr 18 18:36:29.523: AS 1, Flags 0x1:(INIT), Seq 5/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
TOP_ROUTER#
*Apr 18 18:36:31.327: EIGRP: Sending HELLO on Fa0/0 - paklen 20
*Apr 18 18:36:31.327: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0
TOP_ROUTER#
*Apr 18 18:36:34.523: EIGRP: Sending UPDATE on Fa0/0 - paklen 0 nbr 10.24.0.2, retry 11, RTO 5000 tid 0
*Apr 18 18:36:34.531: AS 1, Flags 0x1:(INIT), Seq 5/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Apr 18 18:36:34.707: EIGRP: Received HELLO on Fa0/0 - paklen 20 nbr 10.24.0.2
*Apr 18 18:36:34.707: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
TOP_ROUTER#
*Apr 18 18:36:36.043: EIGRP: Sending HELLO on Fa0/0 - paklen 20
*Apr 18 18:36:36.043: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0
TOP_ROUTER#
*Apr 18 18:36:39.531: EIGRP: Sending UPDATE on Fa0/0 - paklen 0 nbr 10.24.0.2, retry 12, RTO 5000 tid 0
*Apr 18 18:36:39.539: AS 1, Flags 0x1:(INIT), Seq 5/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Apr 18 18:36:40.411: EIGRP: Sending HELLO on Fa0/0 - paklen 20
*Apr 18 18:36:40.415: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 1/0 iidbQ un/rely 0/0
TOP_ROUTER#u all
All possible debugging has been turned off
TOP_ROUTER#deb
*Apr 18 18:36:41.923: EIGRP: Received HELLO on Fa0/0 - paklen 20 nbr 10.24.0.2
*Apr 18 18:36:41.927: AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1

=========================================R3==================================================

MID_ROUTER#sho ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C 10.15.1.12/30 is directly connected, Serial0/0
C 10.24.0.0/24 is directly connected, FastEthernet0/0
D 10.23.1.0/24 [90/2172416] via 10.15.1.14, 00:02:17, Serial0/0
*Mar 1 00:02:35.679: %SYS-5-CONFIG_I: Configured from console by console
MID_ROUTER# sho ip pro
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
10.15.1.12/30
10.24.0.0/24
Routing Information Sources:
Gateway Distance Last Update
10.15.1.14 90 00:01:46
10.24.0.1 90 00:02:08
Distance: internal 90 external 170

MID_ROUTER# debug eigrp packets
EIGRP Packets debugging is on
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)
MID_ROUTER#
*Mar 1 00:02:44.415: EIGRP: Sending HELLO on Serial0/0
*Mar 1 00:02:44.415: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:02:45.755: EIGRP: Sending HELLO on FastEthernet0/0
*Mar 1 00:02:45.755: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:02:49.255: EIGRP: Sending HELLO on Serial0/0
*Mar 1 00:02:49.255: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:02:50.583: EIGRP: Sending HELLO on FastEthernet0/0
*Mar 1 00:02:50.583: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:02:52.959: EIGRP: Received HELLO on Serial0/0 nbr 10.15.1.14
*Mar 1 00:02:52.963: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:02:53.763: EIGRP: Sending HELLO on Serial0/0
*Mar 1 00:02:53.763: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:02:54.839: EIGRP: Sending HELLO on FastEthernet0/0
*Mar 1 00:02:54.839: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:02:58.547: EIGRP: Sending HELLO on Serial0/0
*Mar 1 00:02:58.547: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:02:59.135: EIGRP: Sending HELLO on FastEthernet0/0
*Mar 1 00:02:59.135: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:03:02.771: EIGRP: Received HELLO on Serial0/0 nbr 10.15.1.14
*Mar 1 00:03:02.771: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:03:03.019: EIGRP: Sending HELLO on Serial0/0
*Mar 1 00:03:03.019: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:03:03.403: EIGRP: Sending HELLO on FastEthernet0/0
*Mar 1 00:03:03.403: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
MID_ROUTER#
*Mar 1 00:03:07.367: EIGRP: Sending HELLO on Serial0/0
*Mar 1 00:03:07.367: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:03:08.167: EIGRP: Sending HELLO on FastEthernet0/0
*Mar 1 00:03:08.167: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0

Diana Karolina Rojas · ‎04-18-2017

I recommend you do a review of this information from Cisco: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/118974-technote-eigrp-00.html#anc6

There is a path to do the throubleshooting for this kind of Logs.

I hope it can help you.

--Do not forget to rate useful post---

Regards,

MOHAMMED SALMAN · ‎04-18-2017

Thank you for the URL. From the URL and the debug that Julio asked me to take it is clear that its one way communication problem.

Reza Sharifi · ‎04-18-2017

Hi,

Can you post the output of "sh run" from both routers with this issue?

HTH

MOHAMMED SALMAN · ‎04-18-2017

Reza,

====================R1===============
TOP_ROUTER#sho run
Building configuration...

Current configuration : 2310 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname TOP_ROUTER
!
boot-start-marker
boot-end-marker
!
!
enable secret 4 tnhtc92DXBhelxjYk8LWJrPV36S2i4ntXrpb4RFmfqY
!
no aaa new-model
no ip icmp rate-limit unreachable
!
!
!
!
!
!
no ip domain lookup
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address 10.24.0.1 255.255.255.0
ip nat inside
duplex full
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 10.24.2.1 255.255.255.0
ip nat inside
!
interface FastEthernet0/0.5
encapsulation dot1Q 5
ip address 10.24.5.1 255.255.255.0
ip nat inside
!
interface FastEthernet1/0
ip address dhcp
ip nat outside
speed auto
duplex auto
!
interface FastEthernet1/1
no ip address
shutdown
speed auto
duplex auto
!
interface FastEthernet2/0
no ip address
shutdown
speed auto
duplex auto
!
interface FastEthernet2/1
no ip address
shutdown
speed auto
duplex auto
!
interface Serial3/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/4
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/5
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/6
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/7
no ip address
shutdown
serial restart-delay 0
!
!
router eigrp 1
network 10.24.0.0 0.0.0.255
network 10.24.2.0 0.0.0.255
network 10.24.5.0 0.0.0.255
redistribute static
passive-interface FastEthernet0/0.2
passive-interface FastEthernet0/0.5
!
ip nat inside source list 1 interface FastEthernet1/0 overload
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
access-list 1 permit any
!
!
!
control-plane
!
banner motd ^C
DO NOT FUCKING DARE TO MESS WITH MY CONFIG
^C
!
line con 0
exec-timeout 0 0
privilege level 15
password NuggetLove
logging synchronous
stopbits 1
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line vty 0 4
password NuggetLove
logging synchronous
login
!
!
end

=============================================R3=========================================

MID_ROUTER#SHO RUN
Building configuration...

Current configuration : 1618 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname MID_ROUTER
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$jsbl$hcBHMnskDuunJEiP2B7r5.
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
ip address 10.24.0.2 255.255.255.0
speed 100
full-duplex
!
interface Serial0/0
ip address 10.15.1.13 255.255.255.252
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
clock rate 2000000
!
interface Serial0/2
no ip address
shutdown
clock rate 2000000
!
interface Serial0/3
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
!
router eigrp 1
network 10.15.1.12 0.0.0.3
network 10.24.0.0 0.0.0.255
no auto-summary
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner motd ^C
DO NOT FUCKING DARE TO MESS WITH MY CONFIG
^C
!
line con 0
exec-timeout 0 0
privilege level 15
password NuggetLove
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
password NuggetLove
logging synchronous
login
!
!
end

Reza Sharifi · ‎04-18-2017

I am not sure why you have a physical interface with IP 10.24.0.1 and 2 sub-interfaces with IPs and dot1q and the other side just one physical interface So, try removing the 2 sub-interfaces and test EIGRP neighbor again with just the physical interface.

nterface FastEthernet0/0
ip address 10.24.0.1 255.255.255.0
ip nat inside
duplex full
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 10.24.2.1 255.255.255.0
ip nat inside
!
interface FastEthernet0/0.5
encapsulation dot1Q 5
ip address 10.24.5.1 255.255.255.0
ip nat inside

HTH

MOHAMMED SALMAN · ‎04-18-2017

The 2 PCs on the left side are in vlan 2 and 5 and thus the subinterfaces were created. If I remove them then I would have to remove them then the PCs would not be able to go to the internet.

Reza Sharifi · ‎04-18-2017

Than can you try using a different physical interface e.g fa2/0 for EIGRP peering?

MOHAMMED SALMAN · ‎04-18-2017

No option of changing the topology

EIGRP ISSUE