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Router on a stick - DHCP not feed 2nd Vlan

Confuseis
Level 1
Level 1

Hi

I'm looking to setup a router on a stick with 2 Vlans and have DHCP operate on both  Vlan 2   and vlan 3

I'm using packet tracer v 7.2

I have setup the Vlans and the machines are able to ping each other through the Vlans

Have setup and assigned the ports to each vlan and ensured the machines are in the correct ports for their vlan.

Ive set the sub interfaces on the router with the default gateway for each sub interface.

The machines on the Vlan 2 are getting their IP address OK   but those on Vlan 3   are not.  

I set them up identically so I dont see why one is working and not the other.

Ive included some detail below.   I doubled checked my config but not sure if im getting tunnel vision.

 

 

# Configure the Switch Gig port as a Trunking port.

Interface GigabitEthernet 0/1

No shutdown

Switchport mode trunk

 

# Configure the Router Gig port as the receiving Trunk port

Interface gigabitEthernet 0/0

No shutdown

No ip address

Duplex auto

Speed auto

 

# Set the sub interfaces on the router Trunk port.  e.g. . 2 represent corresponding vlan 2

interface GigabitEthernet 0/0.2

encapsulation dot1Q 10

ip address    192.168.2.126     255.255.255.128        # Last ip addr of that range to be the default gateway on Vlan 2.

 

interface GigabitEthernet 0/0.3

encapsulation dot1Q 10

ip address    192.168.2.254     255.255.255.128        # Last ip addr of that range to be the default gateway on Vlan 3.

 

# DHCP SET EXCLUSIONS

 

# Default Gateway exclusion for each subnet.   Ensure DG address not given out.

Router(config)#     ip dhcp excluded-address    192.168.2.126    255.255.255.128          # Vlan 2  DG  - Sales

Router(config)#    ip dhcp excluded-address     192.168.2.254    255.255.255.128          # Vlan 3  DG  - Finance

 

# Have an exclusion of 10 IP addresses for servers, printers etc.    for    Sales       Vlan 2

Router(config)#    ip dhcp excluded-address     192.168.2.1         192.168.2.10

 

# Have an exclusion of 10 IP addresses for servers, printers etc.    for    Finance  Vlan 3

Router(config)#   ip dhcp excluded-address      192.168.2.129    192.168.2.139

 

# Setup DHCP for Sales Vlan 2 - Identify using the network ID/Mask

Router(config)#              ip dhcp pool   SalesVlan2                                   # Dhcp setting name

Router(dhcp-config)#    network 192.168.2.0      255.255.255.128     # Identify Network

Router(dhcp-config)#    default-router   192.168.2.126                        # Default gateway for that subnet

 

# Setup DHCP for Finance Vlan 3  - Identify using the network ID/Mask

Router(config)#              ip dhcp pool FinanceVlan3

Router(dhcp-config)#    network 192.168.2.128    255.255.255.128

Router(dhcp-config)#    default-router   192.168.2.254

1 Accepted Solution

Accepted Solutions

Hi @Confuseis 

 

Apparently it is a PT bug.
I have created a new router and entered the settings for DHCP and I have been successful.
I have version 7.3, so if I attach my exercise to you, you won't be able to open it with your version.
I suggest you create a new router and re-enter the commands.

 

Regards

View solution in original post

5 Replies 5

luis_cordova
VIP Alumni
VIP Alumni

Hi @Confuseis 

 

Compress your exercise (winzip) and attach it to check.

In the meantime, try this change:

interface GigabitEthernet 0/0.2

encapsulation dot1Q 2

ip address    192.168.2.126     255.255.255.128     

 

interface GigabitEthernet 0/0.3

encapsulation dot1Q 3

ip address    192.168.2.254     255.255.255.128   

Regards

Ive tried those amendments but no joy.  Ive attached the file to the main post

Thanks

Hi @Confuseis 

 

Apparently it is a PT bug.
I have created a new router and entered the settings for DHCP and I have been successful.
I have version 7.3, so if I attach my exercise to you, you won't be able to open it with your version.
I suggest you create a new router and re-enter the commands.

 

Regards

Martin L
VIP
VIP

 

as far as I know PT does NOT support multi-pool on a router; nothing wrong with configs; it is just PT limitation as it is a software sim, not real IOS

 

please use Server DHCP

 

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

Looks from previous post it worked on 7.3

In any case looks like packet tracer is the culprit which brings me some relief

as sank way too much time troubleshooting configs.

 

Thanks to both of you