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DHCP on packet tracer error

ubsaccount
Level 1
Level 1

I keep getting this error on my DHCP request on my packet tracer. DHCP Failed APIPA is being used.

 

here is my configuration for my router and the core switch where I put the IP helper


ROUTER

ip dhcp excluded-address 10.0.70.252 10.0.70.254

ip dhcp excluded-address 10.0.80.252 10.0.80.254

ip dhcp excluded-address 10.0.100.252 10.0.100.254

ip dhcp excluded-address 10.0.50.252 10.0.50.254

ip dhcp excluded-address 10.0.70.253

ip dhcp excluded-address 10.0.80.253

ip dhcp excluded-address 10.0.100.253

ip dhcp excluded-address 10.0.50.253

!

ip dhcp pool Staff

network 10.0.70.0 255.255.255.0

default-router 10.0.70.254

dns-server 8.8.8.8

ip dhcp pool Voice

network 10.0.100.0 255.255.255.0

default-router 10.0.100.254

option 150 ip 172.16.100.1

dns-server 8.8.8.8

ip dhcp pool Admin

network 10.0.80.0 255.255.255.0

default-router 10.0.80.254

dns-server 8.8.8.8

ip dhcp pool Guest

network 10.0.50.0 255.255.255.0

default-router 10.0.50.254

dns-server 8.8.8.8

!

!

!

ip cef

no ipv6 cef

 

ip domain-name ABC

interface Loopback0

ip address 172.16.100.1 255.255.255.0

!

interface Loopback1

ip address 10.11.11.1 255.255.255.0

!

interface Loopback2

ip address 10.12.12.1 255.255.255.0

!

interface Loopback3

ip address 10.13.13.1 255.255.255.0

!

interface Loopback4

ip address 10.14.14.1 255.255.255.0

!

interface Loopback5

ip address 10.15.15.1 255.255.255.0

!

interface Loopback6

ip address 10.16.16.1 255.255.255.0

!

interface FastEthernet0/0

description Linke to DLSW1

ip address 172.16.20.2 255.255.255.252

duplex auto

speed auto

!

interface FastEthernet0/1

description Link to DLSW2

ip address 172.16.20.6 255.255.255.252

duplex auto

speed auto

!

router eigrp 10

network 10.0.50.0 0.0.0.255

network 10.0.70.0 0.0.0.255

network 10.0.80.0 0.0.0.255

network 10.0.100.0 0.0.0.255

network 172.16.20.0 0.0.0.3

network 172.16.20.4 0.0.0.3

network 172.16.100.0 0.0.0.255

network 10.0.10.0 0.0.0.255

network 172.16.8.0 0.0.0.3

no auto-summary

!

ip classless

!

ip flow-export version 9

!

line con 0

!

line aux 0

!

line vty 0 4

password 7 0822455D0A16

login

transport input ssh

 

 

 

SWITCH

 

spanning-tree mode rapid-pvst

spanning-tree portfast default

spanning-tree vlan 10,50,70 priority 24576

spanning-tree vlan 80,90,100 priority 28672

!

 

interface Port-channel 2

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface Port-channel 4

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/1

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/2

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/3

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/4

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/5

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/6

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/7

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/8

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/9

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/10

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/11

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/12

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/13

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/14

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/15

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/16

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/17

switchport access vlan 300

switchport mode access

shutdown

!

interface FastEthernet0/18

switchport mode access

spanning-tree portfast

!

interface FastEthernet0/19

channel-group 2 mode desirable

switchport trunk allowed vlan 10,70,80,100

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/20

channel-group 2 mode desirable

switchport trunk allowed vlan 10,70,80,100

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/21

channel-group 4 mode desirable

switchport trunk allowed vlan 10,50,70,100

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/22

channel-group 4 mode desirable

switchport trunk allowed vlan 10,50,70,100

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface FastEthernet0/23

no switchport

ip address 172.16.20.9 255.255.255.252

duplex auto

speed auto

!

interface FastEthernet0/24

no switchport

ip address 172.16.20.1 255.255.255.252

duplex auto

speed auto

!

interface GigabitEthernet0/1

!

interface GigabitEthernet0/2

switchport trunk encapsulation dot1q

switchport mode trunk

spanning-tree guard root

!

interface Vlan1

no ip address

shutdown

!

interface Vlan10

ip address 10.0.10.254 255.255.255.0

!

interface Vlan50

ip address 10.0.50.252 255.255.255.0

ip helper-address 10.14.14.1

standby version 2

standby 50 ip 10.0.50.254

standby 50 priority 150

standby 50 preempt

!

interface Vlan70

ip address 10.0.70.252 255.255.255.0

ip helper-address 10.15.15.1

standby version 2

standby 70 ip 10.0.70.254

standby 70 priority 150

standby 70 preempt

!

interface Vlan80

ip address 10.0.80.252 255.255.255.0

ip helper-address 10.16.16.1

standby version 2

standby 80 ip 10.0.80.254

standby 80 preempt

!

interface Vlan90

ip address 10.0.90.252 255.255.255.0

standby version 2

standby 90 ip 10.0.90.254

standby 90 preempt

!

interface Vlan100

ip address 10.0.100.252 255.255.255.0

ip helper-address 172.16.100.1

standby version 2

standby 100 ip 10.0.100.254

standby 100 preempt

!

router eigrp 10

network 10.0.50.0 0.0.0.255

network 10.0.70.0 0.0.0.255

network 10.0.80.0 0.0.0.255

network 10.0.100.0 0.0.0.255

network 172.16.20.0 0.0.0.3

network 172.16.20.4 0.0.0.3

network 172.16.100.0 0.0.0.255

network 10.0.10.0 0.0.0.255

network 172.16.8.0 0.0.0.3

no auto-summary

!

ip classless

ip route 0.0.0.0 0.0.0.0 172.16.20.6

ip route 0.0.0.0 0.0.0.0 172.16.20.2

!

ip flow-export version 9

!

snmp-server community AbComp@ny RO

!

line con 0

!

line aux 0

!

line vty 0 4

password 7 0822455D0A16

login

transport input ssh

!

!

end

 

2 Replies 2

Mark Malone
VIP Alumni
VIP Alumni

Hi you have told your switch vlans to use the ip helper -address to get to the place where they can get their address but you have not advertised any of these loopbacks on the router so how does the switch know how to reach the helper addresses to get the dhcp ? If the switch cannot reach these in loop backs the helper is no good, just something i see without testing it may help

 

thanks... It worked.  I just advertised my loopbacks and the computers started getting DHCP