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VIP Mentor

Re: GNS 3 iosvl2 Switch not Forwarding DHCP reply packets to the requesting vlan

Hello,

 

post the current configs of both routers...

Beginner

Re: GNS 3 iosvl2 Switch not Forwarding DHCP reply packets to the requesting vlan

Main-Router Configuration Dump

MainRouter#sh run
Building configuration...

Current configuration : 994 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname MainRouter
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
!
!
no ip domain lookup
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 no ip address
 duplex full
!
interface FastEthernet0/0.2
 encapsulation dot1Q 2 native
 ip address 192.168.2.1 255.255.255.0
 ip helper-address 192.168.2.2
!
interface FastEthernet0/0.3
 encapsulation dot1Q 3
 ip address 192.168.3.1 255.255.255.0
 ip helper-address 192.168.2.2
!
!
router eigrp 1
 network 0.0.0.0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
!
end

 DHCP-Server Configuration Dump

Building configuration...

Current configuration : 1036 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname DHCP-Server
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
no ip icmp rate-limit unreachable
ip cef
!
!
!
ip dhcp excluded-address 192.168.2.0 192.168.2.10
ip dhcp excluded-address 192.168.3.0 192.168.3.10
!
ip dhcp pool IT
 network 192.168.2.0 255.255.255.0
 default-router 192.168.2.1
!
ip dhcp pool Clients
 network 192.168.3.0 255.255.255.0
 default-router 192.168.3.1
!
!
!
no ip domain lookup
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.2.2 255.255.255.0
 duplex full
!
!
router eigrp 1
 network 0.0.0.0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
!
end
Rising star

Re: GNS 3 iosvl2 Switch not Forwarding DHCP reply packets to the requesting vlan

DHCP-Server#sh ip route
VIP Mentor

Re: GNS 3 iosvl2 Switch not Forwarding DHCP reply packets to the requesting vlan

Hello,

 

on the main router, change the vlan 2 subinterface back to what it was (no native):

 

interface FastEthernet0/0.2
encapsulation dot1Q 2 
ip address 192.168.2.1 255.255.255.0
!
interface FastEthernet0/0.3
encapsulation dot1Q 3
ip address 192.168.3.1 255.255.255.0
ip helper-address 192.168.2.2

 

Also, make sure that the switchport connected to your DHCP-Server router is configured as an access port in vlan 2.

 

You need to be able to reach 192.168.3.1 from the DHCP server.

View solution in original post

Highlighted
Beginner

Re: GNS 3 iosvl2 Switch not Forwarding DHCP reply packets to the requesting vlan

Thank you very much
The DHCP lab is finally Functional

I can't thank you enough for assisting me

VIP Mentor

Re: GNS 3 iosvl2 Switch not Forwarding DHCP reply packets to the requesting vlan

Glad that you got it resolved !

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