DHCP failed. APIPA being used.

[dwallace7023]

I am using packet tracer.  I have a Router, Switch & 4 PC's.  When I go into the PC's Ip configuration & enable DHCP I get the "DHCP failed. APIPA being used" error.   What am I missing or doing wrong?

I used the following for configuration on R1: (only provided info for vlan 10 & 20)

ip dhcp excluded-address 172.31.10.1 172.31.10.10

ip dhcp pool VLAN_10

network 172.31.10.0 255.255.255.224

default-router 172.31.10.1

dns-server 209.165.201.14

interface g0/0.10

encapsulation dot1Q 10

ip address 172.31.10.1 255.255.255.224

ip dhcp excluded-address 172.31.20.1 172.31.20.10

ip dhcp pool VLAN_20

network 172.31.20.0 255.255.255.240

default-router 172.31.20.1

dns-server 209.165.201.14

interface g0/0.20

encapsulation dot1Q 20

ip address 172.31.20.1 255.255.255.240

[Flavio Miranda]

What about the switch side? Can you attach the zipped .pkt file?

[dwallace7023]

S2#show vlan brief

VLAN Name Status Ports

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

1 default active Gig0/1, Gig0/2

10 Sales active Fa0/5, Fa0/6, Fa0/7, Fa0/8

Fa0/9

20 Production active Fa0/10, Fa0/11, Fa0/12, Fa0/13

Fa0/14

30 Marketing active Fa0/15, Fa0/16, Fa0/17, Fa0/18

Fa0/19

40 HR active Fa0/20, Fa0/21, Fa0/22, Fa0/23

Fa0/24

1002 fddi-default active

1003 token-ring-default active

1004 fddinet-default active

1005 trnet-default active

[Flavio Miranda]

share the switch "show run"

Or attach the file. 

[dwallace7023]

Show run on Switch

interface FastEthernet0/1

switchport mode trunk

!

interface FastEthernet0/2

switchport mode trunk

!

interface FastEthernet0/3

switchport mode trunk

!

interface FastEthernet0/4

switchport mode trunk

!

interface GigabitEthernet0/1

switchport mode access

!

interface GigabitEthernet0/2

switchport mode access

[Flavio Miranda]

Which switch interface is connected to the router and which one is connected to the PC?

[MHM Cisco World]

interface g0/0

no shut

[dwallace7023]

I did the interface g0/0, no shut. It is still not working.  

Here is what show run looks like:

ip dhcp excluded-address 172.31.10.1 172.31.10.10

ip dhcp excluded-address 172.31.20.1 172.31.20.10

ip dhcp excluded-address 172.31.30.1 172.31.30.10

ip dhcp excluded-address 172.31.40.1 172.31.40.10

!

ip dhcp pool VLAN_10

network 172.31.10.0 255.255.255.224

default-router 172.31.10.1

dns-server 209.165.201.14

ip dhcp pool VLAN_20

network 172.31.20.0 255.255.255.240

default-router 172.31.20.1

dns-server 209.165.201.14

ip dhcp pool VLAN_30

network 172.31.30.0 255.255.255.128

default-router 172.31.30.1

dns-server 209.165.201.14

ip dhcp pool VLAN_40

network 172.31.40.0 255.255.255.192

default-router 172.31.40.1

dns-server 209.165.201.14

!

interface GigabitEthernet0/0

no ip address

duplex auto

speed auto

!

interface GigabitEthernet0/0.10

encapsulation dot1Q 10

ip address 172.31.10.1 255.255.255.224

!

interface GigabitEthernet0/0.20

encapsulation dot1Q 20

ip address 172.31.20.1 255.255.255.240

!

interface GigabitEthernet0/0.30

encapsulation dot1Q 30

ip address 172.31.30.1 255.255.255.128

!

interface GigabitEthernet0/0.40

encapsulation dot1Q 40

ip address 172.31.40.1 255.255.255.192

[MHM Cisco World]

SW-TRUNK-R

after NO SHUT

force the PC to get IP again via DHCP 

[dwallace7023]

When I turn the DHCP on after the "No shut"

It will give me the IPV4 address & Subnet, I still get the "DHCP failed"

[MHM Cisco World]

Router must connect via trunk "see my above comment"

Pc must connect to access 

[MHM Cisco World]

Ponit for you

Any port config for trunk not appear in show vlan 

You connect router to g0/0 or g0/1 which is access not trunk?

[dwallace7023]

R1(config)#interface gig 0/0

R1(config-if)#no shut

R1(config-if)#interface gig 0/1

R1(config-if)#ip address dhcp

R1(config-if)#no shut

R1(config-if)#

%LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up

R1#show vlan

VLAN Name Status Ports

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

1 default active

1002 fddi-default active

1003 token-ring-default active

1004 fddinet-default active

1005 trnet-default active

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

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

1 enet 100001 1500 - - - - - 0 0

1002 fddi 101002 1500 - - - - - 0 0

1003 tr 101003 1500 - - - - - 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

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

Remote SPAN VLANs

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

--More--

%DHCP-6-ADDRESS_ASSIGN: Interface GigabitEthernet0/1 assigned DHCP address 209.165.200.227, mask 255.255.255.224, hostname R1

Primary Secondary Type Ports

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

[MHM Cisco World]

Trunk or access config in sw side not in router side.

[dwallace7023]

S2#show run

interface GigabitEthernet0/1

switchport mode access

!

interface GigabitEthernet0/2

switchport mode access

!