Re: Can't get DHCP to work in Spanning Tree - Page 2

jholman96 · ‎11-23-2017

I'm not entirely sure what I'm doing wrong. I configured the inter-VLAN routing from the main router with the IP addresses I used as default router for the DHCP pools I also set in the main router. I set the spanning-tree VLANs and even added switchport native VLAN for all of the switches in the spanning tree. I added one of the switchport access to the first PC to test it, but it isn't working and I need some help. Here's my packet tracer file:https://drive.google.com/file/d/1g6yE9gmgRWFj6gWLt-FYNAylYLyYyqPV/view?usp=sharing

Here's the map of the network. None of the PCs can get DHCP. I also didn't hook up the Wireless AP because I wanted to make sure the PCs could get DHCP, first. The Main Router and 2 main switches are in the MDF and the other 6 function in the IDF.

MDF Router (MCE_MDF_Router) config:

Building configuration...

Current configuration : 3910 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
service password-encryption
!
hostname Router
!
!
!
enable password 7 0822404F1A0A
!
!
ip dhcp excluded-address 192.168.8.1 192.168.8.10
ip dhcp excluded-address 192.168.9.1 192.168.9.10
ip dhcp excluded-address 192.168.9.129 192.168.9.138
ip dhcp excluded-address 192.168.10.1 192.168.10.10
ip dhcp excluded-address 192.168.10.65 192.168.10.74
ip dhcp excluded-address 192.168.10.81 192.168.10.90
ip dhcp excluded-address 192.168.10.97 192.168.10.106
ip dhcp excluded-address 192.168.10.113 192.168.10.116
ip dhcp excluded-address 192.168.10.121 192.168.10.122
ip dhcp excluded-address 192.168.10.124 192.168.10.125
!
ip dhcp pool Students-ELEMENTARY-POOL
 network 192.168.8.0 255.255.255.0
 default-router 192.168.8.1
ip dhcp pool Wireless-ELEMENTARY-POOL
 network 192.168.9.0 255.255.255.128
 default-router 192.168.9.1
ip dhcp pool VoIP-ELEMENTARY-POOL
 network 192.168.9.128 255.255.255.128
 default-router 192.168.9.129
ip dhcp pool Faculty-ELEMENTARY-POOL
 network 192.168.10.0 255.255.255.192
 default-router 192.168.10.1
ip dhcp pool IP-Camera-ELEMENTARY-Pool
 network 192.168.10.64 255.255.255.240
 default-router 192.168.10.65
ip dhcp pool Admin-ELEMENTARY-POOL
 network 192.168.10.80 255.255.255.240
 default-router 192.168.10.81
ip dhcp pool Printer-ELEMENTARY-POOL
 network 192.168.10.96 255.255.255.240
 default-router 192.168.10.97
ip dhcp pool Staff-ELEMENTARY-POOL
 network 192.168.10.112 255.255.255.248
 default-router 192.168.10.113
ip dhcp pool Management-ELEMENTARY-POOL
 network 192.168.10.120 255.255.255.252
 default-router 192.168.10.121
ip dhcp pool Native-ELEMENTARY-POOL
 network 192.168.10.124 255.255.255.252
 default-router 192.168.10.125
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524EIIO
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description MCE_MDF_Router to MCE_MDF_CoreSW1
 no ip address
 duplex auto
 speed auto
!
interface GigabitEthernet0/0.10
 encapsulation dot1Q 10
 ip address 192.168.10.81 255.255.255.240
!
interface GigabitEthernet0/0.20
 encapsulation dot1Q 20
 ip address 192.168.8.1 255.255.255.0
!
interface GigabitEthernet0/0.30
 encapsulation dot1Q 30
 ip address 192.168.10.113 255.255.255.248
!
interface GigabitEthernet0/0.40
 encapsulation dot1Q 40
 ip address 192.168.10.1 255.255.255.192
!
interface GigabitEthernet0/0.50
 encapsulation dot1Q 50
 ip address 192.168.10.97 255.255.255.240
!
interface GigabitEthernet0/0.60
 encapsulation dot1Q 60
 ip address 192.168.9.1 255.255.255.128
!
interface GigabitEthernet0/0.70
 encapsulation dot1Q 70
 ip address 192.168.9.129 255.255.255.128
!
interface GigabitEthernet0/0.80
 encapsulation dot1Q 80
 ip address 192.168.10.121 255.255.255.252
!
interface GigabitEthernet0/0.88
 encapsulation dot1Q 88
 ip address 192.168.10.65 255.255.255.240
!
interface GigabitEthernet0/0.99
 encapsulation dot1Q 99 native
 ip address 192.168.10.125 255.255.255.252
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
!
interface GigabitEthernet0/1.10
 encapsulation dot1Q 10
 no ip address
!
interface GigabitEthernet0/1.20
 encapsulation dot1Q 20
 no ip address
!
interface GigabitEthernet0/1.99
 encapsulation dot1Q 99 native
 no ip address
!
interface Serial0/0/0
 no ip address
 clock rate 2000000
 shutdown
!
interface Serial0/0/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
no cdp run
!
banner motd ^CNo Unauthorized Access^C
!
!
!
!
line con 0
 exec-timeout 15 0
 password 7 0822455D0A16
 logging synchronous
 login
!
line aux 0
!
line vty 0 4
 exec-timeout 15 0
 password 7 0822455D0A16
 logging synchronous
 login
line vty 5 15
 exec-timeout 15 0
 password 7 0822455D0A16
 logging synchronous
 login
!
!
!
end

MDF Switch (MCE_MDF_CoreSw1) config:

Building configuration...

Current configuration : 3369 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree vlan 10,20,30,40,50,60 priority 24576
spanning-tree vlan 70,80,88,99 priority 28672
!
interface FastEthernet0/1
 description MCE_MDF_CoreSw1 to MCE_IDF_Switch1_STUDENT
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
!
interface FastEthernet0/2
 description MCE_MDF_CoreSw1 to MCE_IDF_Switch2
 switchport access vlan 80
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/3
 description MCE_MDF_CoreSw1 to MCE_IDF_Switch3
 switchport access vlan 88
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/4
 description MCE_MDF_CoreSw1 to MCE_IDF_Switch4
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/5
 description MCE_MDF_CoreSw1 to MCE_IDF_Switch5
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/6
 description MCE_MDF_CoreSw1 to MCE_IDF_Switch6
 switchport trunk native vlan 99
 switchport trunk allowed vlan 10
 switchport mode trunk
!
interface FastEthernet0/7
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/8
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/9
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/10
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/11
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/12
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/13
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/14
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/15
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/16
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/17
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/18
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/19
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/20
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/21
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/22
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/23
 switchport trunk native vlan 99
 switchport mode trunk
!
interface FastEthernet0/24
 switchport access vlan 60
 switchport trunk native vlan 99
 switchport mode trunk
 switchport port-security maximum 60
 switchport port-security violation restrict 
!
interface GigabitEthernet0/1
 description MCE_MDF_CoreSw1 to MCE_MDF_Router
 switchport trunk native vlan 99
 switchport mode trunk
!
interface GigabitEthernet0/2
 description MCE_MDF_CoreSw1 to MCE_MDF_CoreSw2
 switchport trunk native vlan 99
 switchport mode trunk
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan80
 mac-address 0002.17d4.6101
 ip address 192.168.10.122 255.255.255.248
!
ip default-gateway 192.168.10.125
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
end

IDF Switch (MCE_IDF1_Switch1_STUDENT) config:

Building configuration...

Current configuration : 3363 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
 description MCE_IDF1_Switch1_STUDENT to PC0
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/2
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/3
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/4
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/5
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/6
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/7
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/8
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/9
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/10
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/11
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/12
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/13
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/14
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/15
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/16
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/17
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/18
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/19
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/20
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/21
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/22
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/23
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface FastEthernet0/24
 switchport access vlan 20
 switchport trunk native vlan 99
 switchport mode access
!
interface GigabitEthernet0/1
 description MCE_IDF1_Switch1_STUDENT to MCE_MDF_CoreSw1
 switchport trunk native vlan 99
 switchport mode trunk
!
interface GigabitEthernet0/2
 description MCE_IDF1_Switch1_STUDENT to MCE_MDF_CoreSw2
 switchport trunk native vlan 99
 switchport mode trunk
!
interface Vlan1
 no ip address
 shutdown
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
end

jholman96 · ‎11-24-2017

So I attached the PC and phone together on both IDF Switch 1 and IDF Switch 2 for PC0 and PC1, and only PC0, IP Phone 1, and IP Phone 2 were able to get IP addresses. PC1 couldn't get it, even after an ipconfig /release and /renew.

Georg Pauwen · ‎11-24-2017

Since the exact same configuration is working on my PC, I am thinking that it might have something to do with your local settings. I am running Windows 8.1.

I found the below in a discussion about someone experiencing a similar issue. There are several troubleshooting tips, check those:

--> In the command prompt, enter the command "set". This will display all of your environment variables. Look for ones that says PT6HOME and PT7HOME. They should both point to the version of packet tracer you want to use for the exam. Make sure they are set to the correct location. If it is not, you will have to modify the environment variables in your system settings and restart windows.
Reset your PT configuration settings by going into your home directory (C:\Users\yourusername) and find the Packet Tracer 6.1.1 directory (the directory name will match exactly the same as your PT installation directory name) and find the PT.conf file inside, and delete it.
Turn off windows defender (different from windows firewall), only disable it temporarily to see if it is the culprit.
Go to Windows Firewall, make sure you are connected to a secure network (Home or Work), the public network setting could block certain network accesses.
In Windows Firewall, click the Advanced Settings. In the Inbound Rules, find the ones for Packet Tracer (could be several), delete all of them. Then start Packet Tracer again. There will be a windows firewall prompt, make sure to check the box to allow.
In Control Panels, go to Java. In the General tab, click on Network Settings. Make sure Use Browser Settings is selected. In the Temporary Internet Files section, click on Settings, and click Delete files (this will clear your java cache). In the Security tab, Make sure the setting is at Medium. Click on Restore Security prompts (this will make java prompt you for permissions again from sites you already allowed). Make sure to allow the PT exam when you start it.

Georg Pauwen · ‎11-24-2017

Hello,

I am attaching my working file again (maybe something wasn't saved correctly the last time). Give it a few minutes after startup to converge...

jholman96 · ‎11-24-2017

This seems to work almost perfectly. It keeps requesting time out when I try to ping the ip addresses. Do I have to have portfast on to fix that? And if I change some ports to different VLANS (already stated in vtp) via switchport access on an IDF and add PCs to it, they should get DHCP like the ones currently connected, correct?

Georg Pauwen · ‎11-25-2017

Hello,

spanning-tree portfast is required, otherwise the DHCP broadcast sent from the PC or phone is timing out before the interface goes to forwarding.

Packet Tracer is kind of slow, when I start up the file, it sometimes takes minutes before the PCs get their addresses, but eventually it works. In a 'real' network convergence would be much faster...

jholman96 · ‎11-25-2017

I added portfast to the ports going to the end devices, but I still can't ping them. It still keeps requesting time out. Anything I'm doing wrong?

Georg Pauwen · ‎11-25-2017

I think one of your VLANs (VLAN 30 ?) has only two available host addresses...check the configuration of the router.

Other than that, when I checked, it sometimes took several minutes for the PC to acquire an address...

jholman96 · ‎11-25-2017

I checked VLAN 30, and it's fine. But I can't even ping VLAN 80 on either one of the MDF Core switches. I even tried pinging the default gateways (whatever vlan the pc is on) and still got requested time out. I'm not sure what is wrong, exactly? It times out on every request.