Troubleshooting NW

[Telim]

Hi Guys, I'm trying to do this. But I'm having problems between the Router C and Host D.

Can someone explain me this? Please. Thank you so much.

Password  console in all the routers

topology and determine what is necessary to ping from Host A to Host D successfully.

IP Addresses, Subnet Masks, Routing Protocols, etc.  Configure VLANs for the appropriate switch interfaces and IP addresses.

Once the entire NW has been configured properly all Hosts will successfully ping to all Hosts.

Configure with the following table.

Addressing Scheme:

Host A; 172.16.40.10/24

Host B: 172.16.10.10/24

Host C: 172.16.50.10/24 to switch B interface f0/3

Host D: 172.16.50.254/24 to switch B interface f0/4

Router A: Interface Fa0/1 172.16.40.1/24

Router B: Interface Fa0/1 172.16.10.1/24

Switch B: Interface Fa0/1 172.16.50.1/24 to Router C interface f0/1.

Switch B: Interface Fa0/2 172.16.50.129/24 to Router C interface f0/2

Router A to Router B serial interfaces:  172.16.20.1/24 and 172.16.20.2/24

Router B to Router C serial interfaces:  172.16.30.1/24 and 172.16.30.2/24

[Georg Pauwen]

Hello,

what are the passwords for your routers ?

At the very least, all your hosts have the wrong default gateways. 

[Telim]

console

[Telim]

All passwords are: console

Sorry that I didn't respond sooner. Work all day.

[Georg Pauwen · Accepted solution]

Hello,

on your SwitchB, interface FastEthernet0/4 is in the wrong VLAN (VLAN 20). Make sure the switchports look like below:

SwitchB

interface FastEthernet0/3
switchport access vlan 10

spanning-tree portfast
!
interface FastEthernet0/4
switchport access vlan 10
spanning-tree portfast

On RouterC, delete subinterface FastEthernet0/0.20, as this does not appear to be needed, according to your requirements. So the config of RouterC should look like this:

 Current configuration : 940 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname RouterC
!
no ip cef
no ipv6 cef
!
spanning-tree mode pvst
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 172.16.50.9 255.255.255.0
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
no ip address
clock rate 2000000
shutdown
!
interface Serial0/0/1
ip address 172.16.30.2 255.255.255.0
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 172.16.0.0 0.0.255.255 area 0
!
ip classless
!
ip flow-export version 9
!
banner motd ^C This is my Router C ^C
!
line con 0
password console
login
!
line aux 0
!
line vty 0 4
password telnet
login
!
end

And last but not least, the gateways on your host are all set to 172.16.0.1. Set them as per requirementsL

HostA: 172.16.40.1

HostB: 172.16.20.1

HostC: 172.16.50.9

HostD: 172.16.50.9

[Telim]

Thank you so much for the explanation

[paul driver · Accepted solution]

Hello

Your host default-gateways were incorrect, also you had dupicate subnet advertsiement from RtrA and Rtr c

please review the tracer file attached.