Computer ip from router on a stick

[eXPlosion]

Hello,

why PC-A PC-B and PC-C in packet tracer are not receiving IP from router on a stick Perth.

https://drive.google.com/file/d/1NkxXqM1dIdylQ4lN4MiBP74-LEIMBnlg/view?usp=sharing 

[Martin L]

So far I see following issues (* are critical):

* S1 is connected to wrong port on Router; it should be Fa0/0, not Fa0/1/0

you should have dhcp address exclusion on router to exclude IPs of router from dhcp pool

missing vlans on l2 switches  - switch to trunk vlans must have vlan x in database,

something wrong with etherchannels -  missing some of configs for etherchannels ? only 2 switches doing it or all 3 ?

* Native vlan mismatch between router and a switch

Regards, ML
**Please Rate All Helpful Responses **

[pmckenzie]

as @Martin L  says you need to provide you routers address in DHCP and exclude this address from pool.

As to you Ether Channel well they are non existent.

Here is a lab from Packet tracer people on how to set them up

https://www.packettracernetwork.com/labs/packettracerlabs.html 

[eXPlosion]

Here is modified cfg. I connected on a correct port f0/0, excluded router addresses from DHCP, set default gateway in DHCP, added vlan 20, 30, 40 to database, did not touched etherchannel yet, native vlan is 1 by default (I did not changed):

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/1/0, Fa0/1/1, Fa0/1/2, Fa0/1/3

But computers did not get Address from DHCP

Perth#sh run
Building configuration...

Current configuration : 2027 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Perth
!
!
!
enable secret 5 $1$mERr$/jJFQNiaJSPg5O/2VYM/n0
enable password 
!
!
ip dhcp excluded-address 192.160.50.1
ip dhcp excluded-address 192.160.50.129
ip dhcp excluded-address 192.160.50.65
ip dhcp excluded-address 192.160.50.193
!
ip dhcp pool 10
 network 192.160.50.0 255.255.255.192
 default-router 192.160.50.1
ip dhcp pool 20
 network 192.160.50.64 255.255.255.192
 default-router 192.160.50.65
ip dhcp pool 30
 network 192.160.50.128 255.255.255.192
 default-router 192.160.50.129
ip dhcp pool 40
 network 192.160.50.192 255.255.255.192
 default-router 192.160.50.193
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
ip name-server 192.160.50.100
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/0.1
 encapsulation dot1Q 10 native
 ip address 192.160.50.1 255.255.255.192
!
interface FastEthernet0/0.2
 encapsulation dot1Q 20
 ip address 192.160.50.65 255.255.255.192
!
interface FastEthernet0/0.3
 encapsulation dot1Q 30
 ip address 192.160.50.129 255.255.255.192
!
interface FastEthernet0/0.4
 encapsulation dot1Q 40
 ip address 192.160.50.193 255.255.255.192
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface FastEthernet0/1/0
 switchport mode access
!
interface FastEthernet0/1/1
 switchport mode access
!
interface FastEthernet0/1/2
 switchport mode access
!
interface FastEthernet0/1/3
 switchport mode access
!
interface Serial1/0
 no ip address
 shutdown
!
interface Serial1/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Serial1/2
 no ip address
 clock rate 2000000
 shutdown
!
interface Serial1/3
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 password 33
 login
!
!
!
end


Perth#

[pmckenzie]

Sorry I forgot a step that I added.

Your native vlan is not 1 you  changed it to 10

So you need to change trunk link to native vlan 10 as well

[RobertBentley29378]

Thanks very helpful information.

[pmckenzie]

glad to be of help.

Quick question was this the solution?