05-28-2014 03:17 AM - edited 03-04-2019 11:02 PM
Hello,
I have implemented a frame-relay hub and spoke topology in GNS3
Topology- HUB s0/0-->FRS s0/0
SPOKE1 s0/0-->FRS s0/1
SPOKE2 s0/0-->FRS s0/2
Scenario- One hub router and two spoke routers. For Frame-relay switch i have used a router.
Issue- when i configured EIGRP on hub and spoke routers, serial interfaces of hub and spoke routers which are connected to frame-relay switch are going up and down, I mean they are not stable- line protocols are going down, interfaces are going down, neighbors are going down for every 5 sec.
I am unable to troubleshoot, someone please help me out. I am attaching configs and outputs of routers for your reference.
Frame-relay switch config:
!
hostname FRS
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no network-clock-participate slot 1
no network-clock-participate wic 0
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
frame-relay switching
!
!
ip tcp synwait-time 5
!
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
no ip address
encapsulation frame-relay
clock rate 2000000
frame-relay intf-type dce
frame-relay route 102 interface Serial0/1 201
frame-relay route 103 interface Serial0/2 301
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
encapsulation frame-relay
clock rate 2000000
frame-relay intf-type dce
frame-relay route 201 interface Serial0/0 102
!
interface Serial0/2
no ip address
encapsulation frame-relay
clock rate 2000000
frame-relay intf-type dce
frame-relay route 301 interface Serial0/0 103
!
interface Serial0/3
no ip address
shutdown
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end
Route Status:
FRS#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial0/0 102 Serial0/1 201 inactive
Serial0/0 103 Serial0/2 301 inactive
Serial0/1 201 Serial0/0 102 inactive
Serial0/2 301 Serial0/0 103 inactive
HUB router config:
!
hostname HUB
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no network-clock-participate slot 1
no network-clock-participate wic 0
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
ip tcp synwait-time 5
!
!
interface Loopback1
ip address 10.1.1.1 255.255.255.0
!
interface Loopback2
ip address 10.1.2.1 255.255.255.0
!
interface Loopback3
ip address 10.1.3.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
ip address 172.16.124.1 255.255.255.248
encapsulation frame-relay
no ip split-horizon eigrp 25
frame-relay map ip 172.16.124.2 102 broadcast
frame-relay map ip 172.16.124.3 103 broadcast
frame-relay interface-dlci 102
frame-relay interface-dlci 103
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
!
router eigrp 25
network 10.1.0.0 0.0.255.255
network 172.16.124.1 0.0.0.0
no auto-summary
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end
Frame-realy Status of HUB:
HUB#show frame-realy pvc
PVC Statistics for interface Serial0/0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 0 0 2 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = DELETED, INTERFACE = Serial0/0
input pkts 44 output pkts 127 in bytes 3273
out bytes 5988 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 20 out bcast bytes 1280
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 00:55:36, last time pvc status changed 00:00:20
DLCI = 103, DLCI USAGE = LOCAL, PVC STATUS = DELETED, INTERFACE = Serial0/0
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 0 out bcast bytes 0
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 00:55:32, last time pvc status changed 00:00:26
HUB#show frame-relay map
Serial0/0 (up): ip 172.16.124.2 dlci 102(0x66,0x1860), static,
broadcast,
CISCO, status deleted
Serial0/0 (up): ip 172.16.124.3 dlci 103(0x67,0x1870), static,
broadcast,
CISCO, status defined, inactive
Spoke1 router config:
!
hostname SPOKE1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no network-clock-participate slot 1
no network-clock-participate wic 0
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
ip tcp synwait-time 5
!
!
interface Loopback1
ip address 10.2.1.1 255.255.255.0
!
interface Loopback2
ip address 10.2.2.1 255.255.255.0
!
interface Loopback3
ip address 10.2.3.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
ip address 172.16.124.2 255.255.255.248
encapsulation frame-relay
no ip split-horizon eigrp 25
frame-relay map ip 172.16.124.1 201 broadcast
frame-relay map ip 172.16.124.3 201 broadcast
frame-relay interface-dlci 201
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
!
interface Serial0/2
no ip address
shutdown
!
interface Serial0/3
no ip address
shutdown
!
router eigrp 25
network 10.2.0.0 0.0.255.255
network 172.16.124.2 0.0.0.0
no auto-summary
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end
Frame-relay status of SPOKE1 Router:
SPOKE1#show frame-relay pvc
PVC Statistics for interface Serial0/0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 0 0 1 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 201, DLCI USAGE = LOCAL, PVC STATUS = DELETED, INTERFACE = Serial0/0
input pkts 147 output pkts 270 in bytes 7028
out bytes 16670 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 70 out bcast bytes 4480
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 01:00:13, last time pvc status changed 00:00:07
SPOKE1#show frame map
Serial0/0 (up): ip 172.16.124.1 dlci 201(0xC9,0x3090), static,
broadcast,
CISCO, status defined, inactive
Serial0/0 (up): ip 172.16.124.3 dlci 201(0xC9,0x3090), static,
broadcast,
CISCO, status defined, inactive
Spoke2 router config:
!
hostname SPOKE2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no network-clock-participate slot 1
no network-clock-participate wic 0
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
ip tcp synwait-time 5
!
!
interface Loopback1
ip address 10.3.1.1 255.255.255.0
!
interface Loopback2
ip address 10.3.2.1 255.255.255.0
!
interface Loopback3
ip address 10.3.3.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
ip address 172.16.124.3 255.255.255.248
encapsulation frame-relay
no ip split-horizon eigrp 25
frame-relay map ip 172.16.124.1 301 broadcast
frame-relay map ip 172.16.124.2 301 broadcast
frame-relay interface-dlci 301
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
!
interface Serial0/2
no ip address
shutdown
!
interface Serial0/3
no ip address
shutdown
!
router eigrp 25
network 10.3.0.0 0.0.255.255
network 172.16.124.3 0.0.0.0
no auto-summary
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end
Frame-relay status of SPOKE2 Router:
SPOKE2#show frame-relay pvc
PVC Statistics for interface Serial0/0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 0 1 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 301, DLCI USAGE = LOCAL, PVC STATUS = INACTIVE, INTERFACE = Serial0/0
input pkts 18 output pkts 37 in bytes 832
out bytes 2107 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 8 out bcast bytes 512
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 00:05:07, last time pvc status changed 00:00:44
SPOKE2#show frame-relay map
Serial0/0 (up): ip 172.16.124.1 dlci 301(0x12D,0x48D0), static,
broadcast,
CISCO, status defined, active
Serial0/0 (up): ip 172.16.124.2 dlci 301(0x12D,0x48D0), static,
broadcast,
CISCO, status defined, active
05-28-2014 03:29 AM
Post the "sh interface <PORTS>".
05-28-2014 08:26 AM
HUB#sh inter s0/0
Serial0/0 is up, line protocol is down
Hardware is PowerQUICC Serial
Internet address is 172.16.124.1/29
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, loopback not set
Keepalive set (10 sec)
LMI enq sent 56, LMI stat recvd 33, LMI upd recvd 0, DTE LMI down
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 13/0, interface broadcasts 9
Last input 00:00:07, output 00:00:07, output hang never
Last clearing of "show interface" counters 00:09:56
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
50 packets input, 1466 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
114 packets output, 3173 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
SPOKE1#sh int s0/0
Serial0/0 is up, line protocol is down
Hardware is PowerQUICC Serial
Internet address is 172.16.124.2/29
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, loopback not set
Keepalive set (10 sec)
LMI enq sent 43, LMI stat recvd 39, LMI upd recvd 0, DTE LMI down
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 14/0, interface broadcasts 10
Last input 00:00:44, output 00:00:04, output hang never
Last clearing of "show interface" counters 00:07:39
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
64 packets input, 1779 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
94 packets output, 2899 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
SPOKE2#sh int s0/0
Serial0/0 is up, line protocol is up
Hardware is PowerQUICC Serial
Internet address is 172.16.124.3/29
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, loopback not set
Keepalive set (10 sec)
LMI enq sent 49, LMI stat recvd 50, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 8/0, interface broadcasts 11
Last input 00:00:07, output 00:00:07, output hang never
Last clearing of "show interface" counters 00:08:45
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
66 packets input, 1587 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
100 packets output, 2918 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
05-29-2014 07:23 AM
Hello,
there is a lot of unnecessary configuration I'd remove:
Hub:
interface Serial0/0
ip address 172.16.124.1 255.255.255.248
encapsulation frame-relay
no ip split-horizon eigrp 25
no frame-relay map ip 172.16.124.2 102 broadcast
no frame-relay map ip 172.16.124.3 103 broadcast
no frame-relay interface-dlci 102
no frame-relay interface-dlci 103
Spoke 1:
interface Serial0/0
ip address 172.16.124.2 255.255.255.248
encapsulation frame-relay
ip split-horizon eigrp 25 ! A spoke is not a hub!
no frame-relay map ip 172.16.124.1 201 broadcast
frame-relay map ip 172.16.124.3 201 ! just for spoke-to-spoke connectivity, if needed
no frame-relay interface-dlci 201
You're soley using main-interfaces, so you don't need to configure an interface-DLCI. DLCIs learned by LMI are assigned to the main interface by default.
InARP is enabled (by default), so static IP-to-DLCI mapping is (if at all) only needed for the spoke-to-spoke connetivity on the 172.16.124.0 segment, if this is of importance. The broadcast-keyword is normally not needed in this case, because EIGRP won't form a neighborship as the spokes are not directly connected (spoke-to-spoke traffic has to be send through the hub). Main-interfaces support (pseudo-)broadcast by default.
With this simple configuration, the show frame-relay lmi, -pvc and -map commands should provide a much easier troubleshooting as well.
HTH
Rolf
05-29-2014 09:15 AM
Hello Rolf
Even though your suggestion is valid I don't think it is a desired solution as this can assign unwarranted dynamic dlci mappings which can have effect on multicast and broadcast traffic.
If eigrp is to be used with multipoint FR , then static mapping I believe is the suggested process with inverse arp disabled and the broadcast key applied to the static mapping for eigrp multicast 224.0.0.10 traffic to traverse the link.
Lastly In my previous post I have suggested to use eigrp unicast for a much cleaner peering so no spoke to spoke eigp peering can occur dynamically when spoke to spoke mappings are in use..
res
Paul
05-29-2014 10:37 AM
Hello Paul,
thanks for your comment. I would agree on using static mappings and unicast peering is the better solution, especially from a security-perspective.
However, I had the feeling that main problem in the original posting was understanding the impact of the frame-relay interface-dlci and the frame-relay map commands on different interface types, so I tried to focus on that.
So I'd like to add some possible changes in the original setup to see what those commands are good for:
On Spoke-1, we could use a point-to-point subinterface instead of the main-interface:
interface Serial0/0
no ip address
encapsulation frame-relay
!
interface Serial0/0.201 point-to-point
ip address 172.16.124.2 255.255.255.248
!
Problem:
Incomming frames are still assigned to the main-interface:
Serial0/0: FR ARP input
datagramstart = 0x7A01C4E, datagramsize = 34
FR encap = 0x30910300
80 00 00 00 08 06 00 0F 08 00 02 04 00 08 00 00
AC 10 7C 01 18 61 00 00 00 00 01 02 00 00
Solution:
Sp2(config)#int s0/0.201
Sp2(config-subif)#frame-relay interface-dlci 201
Serial0/0.201: FR ARP input
datagramstart = 0x7A01B0E, datagramsize = 34
FR encap = 0x30910300
80 00 00 00 08 06 00 0F 08 00 02 04 00 08 00 00
AC 10 7C 01 18 61 00 00 00 00 01 02 00 00
Serial0/0.201: inarp received on 201
%DUAL-5-NBRCHANGE: IP-EIGRP(0) 25: Neighbor 172.16.124.1 (Serial0/0.201) is up: new adjacency
-------------------------------------------------------------------------------------------
The other subinterface type is Multipoint, this would apply to the hub:
interface Serial0/0
no ip address
encapsulation frame-relay
!
interface Serial0/0.1 multipoint
ip address 172.16.124.1 255.255.255.248
no ip split-horizon eigrp 25
!
But: Same problem as above.
Serial0/0: FR ARP input
datagramstart = 0x7B631AE, datagramsize = 34
FR encap = 0x18710300
80 00 00 00 08 06 00 0F 08 00 02 04 00 08 00 00
AC 10 7C 03 48 D1 00 00 00 00 01 02 00 00
Serial0/0: inarp received on 103
We could solve that the same way, but we could also use static mappings:
interface Serial0/0.1 multipoint
ip address 172.16.124.1 255.255.255.248
no ip split-horizon eigrp 25
frame-relay map ip 172.16.124.2 102 broadcast
frame-relay map ip 172.16.124.3 103 broadcast
!
Now, the initial sending of InARP-request is disabled, but incomming request will still be answered. This would also be the case when the frame-relay map command is applied on main-interfaces.
So we have 3 different configurations now and the output of the show frame-relay map command is slightly different for all of them:
Hub:
Serial0/0.1 (up): ip 172.16.124.2 dlci 102(0x66,0x1860), static,broadcast, CISCO, status defined, active
Spoke-1:
Serial0/0.201 (up): point-to-point dlci, dlci 201(0xC9,0x3090), broadcast status defined, active
Spoke-2:
Serial0/0 (up): ip 172.16.124.1 dlci 301(0x12D,0x48D0), dynamic, broadcast,, status defined, active
HTH
Rolf
05-29-2014 11:26 AM
Hello Rolf
Thanks for sharing your suggestions also, this what these forums are all about
res
Paul
05-28-2014 09:50 AM
*Mar 1 00:36:27.818: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 25: Neighbor 172.16.124.1 (Serial0/0) is down: retry limit exceeded
SPOKE1#
*Mar 1 00:36:45.014: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 25: Neighbor 172.16.124.1 (Serial0/0) is up: new adjacency
SPOKE1#sh ip eigrp nei 25
IP-EIGRP neighbors for process 25
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.124.1 Se0/0 155 00:00:24 1 5000 2 0
SPOKE2#sh ip eigrp neighbors 25
IP-EIGRP neighbors for process 25
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.124.1 Se0/0 129 00:02:46 1 5000 2 31
05-28-2014 09:51 AM
*Mar 1 00:36:27.818: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 25: Neighbor 172.16.124.1 (Serial0/0) is down: retry limit exceeded
SPOKE1#
*Mar 1 00:36:45.014: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 25: Neighbor 172.16.124.1 (Serial0/0) is up: new adjacency
SPOKE1#sh ip eigrp nei 25
IP-EIGRP neighbors for process 25
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.124.1 Se0/0 155 00:00:24 1 5000 2 0
SPOKE2#sh ip eigrp neighbors 25
IP-EIGRP neighbors for process 25
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.124.1 Se0/0 129 00:02:46 1 5000 2 31
05-28-2014 02:50 PM
Hello
For hub& spoke eigrp try using unicast peering instead of multicast
.HUB
router eigrp 25
neighbour 172.16.124.1 serial0/0
neighbour 172.16.124.3 serial0/0
Spokes
router eigrp 25
neighbour 172.16.124.2 serial0/0
res
Paul
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