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Why can't i use the network 172.16.0.0 network on a serial interface?
gbdavidx
Member Posts: 840
in CCNA & CCENT
I'm trying to practice EIGRP configuration in packet tracer, but when I do 172.16.0.0 and add my other networks such as 172.16.32.0, 172.16.64.0 it doens't get added. i do have no auto-summary enabled...
Router(config-router)#do show run
Building configuration...
Current configuration : 733 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
ip address 192.168.1.2 255.255.255.0
duplex auto
speed auto
!
interface Serial0/1/0
ip address 172.16.0.1 255.255.224.0
encapsulation frame-relay
!
interface Serial0/1/1
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
network 172.16.0.0 0.0.0.31
network 172.16.160.0 0.0.0.31
no auto-summary
!
ip classless
!
!
!
!
!
!
!
And Router 2
Router(config-router)#do show run
Building configuration...
Current configuration : 705 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
ip address 172.16.96.1 255.255.224.0
duplex auto
speed auto
!
interface Serial0/1/0
ip address 172.16.0.2 255.255.224.0
!
interface Serial0/1/1
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
network 172.16.96.0 0.0.0.31
network 172.16.0.0 0.0.0.31
no auto-summary
!
Router(config-router)#do show run
Building configuration...
Current configuration : 733 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
ip address 192.168.1.2 255.255.255.0
duplex auto
speed auto
!
interface Serial0/1/0
ip address 172.16.0.1 255.255.224.0
encapsulation frame-relay
!
interface Serial0/1/1
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
network 172.16.0.0 0.0.0.31
network 172.16.160.0 0.0.0.31
no auto-summary
!
ip classless
!
!
!
!
!
!
!
And Router 2
Router(config-router)#do show run
Building configuration...
Current configuration : 705 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
ip address 172.16.96.1 255.255.224.0
duplex auto
speed auto
!
interface Serial0/1/0
ip address 172.16.0.2 255.255.224.0
!
interface Serial0/1/1
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
network 172.16.96.0 0.0.0.31
network 172.16.0.0 0.0.0.31
no auto-summary
!
Comments
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Optionsgbdavidx
Member Posts: 840
figured out i had encapsulation set for frame relay on one switch but not the other!!! lol
disregard
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OptionsJon_Cisco
Member Posts: 1,772 ■■■■■■■■□□
I think you have overlapping IP addresses.
You gave us the two running configs but not the results of the routing table.
Check your subnet masks. How many devices are on the networks.
Your fastethernet link should give you some problems.
Then confirm the serial link is up and transferring traffic.
I would confirm that you can communicate on the link without eigrp.
Hope this helps. I am always vague on purpose.
Good Luck!
edit:
I don't have time to test it out but I wonder what the results of using a single network statement would be.
router eigrp 1
network 172.16.0.0
no auto-summary -
Optionsgbdavidx
Member Posts: 840
it worked when i removed encapsulation frame-relay from Router, since my router two didn't have it on its serial interface, i added them both back to both routers and they converged again!
I also changed 172.16.0.1 0.0.0.31 to be networked