I have a 3560 with 3 VLan and 3 dells 2724 (L2 switch).
My problem is that I am not able to get Ip address from the DHCP server on 10.1.5.7 (behind the dell 10.1.5.1)
I can manually config ip address on the pc behind all the dells and can ping all devices.
Also I cannot release the IP address. even after I set the PC to dynamic IP address allocation, it will always get the old static Ip address.
The network diagram is as follows:
router (10.1.1.1)
|
|
|(10.1.1.2)
3560
|
|
|---------------------------|-----------------------------|
| | |
dell 2724 dell 2724 dell 2724
(Vlan5) (Vlan 6) (Vlan 7)
(dell's IP 10.1.5.2) (dell's IP 10.1.6.2) (Dells IP=10.1.7.2)
(DHCP on 10.1.5.7)
config of the cisco switch is as follows:
cisco_switch_b>
cisco_switch_b>en
Password:
cisco_switch_b#sh
cisco_switch_b#show run
cisco_switch_b#show running-config
Building configuration...
Current configuration : 2354 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname cisco_switch_b
!
enable secret xxx
enable password xxx
!
ip subnet-zero
ip routing
!
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
!
!
!
interface GigabitEthernet0/1
description To Internet Router
no switchport
ip address 10.1.1.2 255.255.255.0
!
interface GigabitEthernet0/2
!
interface GigabitEthernet0/3
!
interface GigabitEthernet0/4
!
interface GigabitEthernet0/5
!
interface GigabitEthernet0/6
!
interface GigabitEthernet0/7
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet0/8
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet0/9
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet0/10
switchport access vlan 5
switchport mode access
!
interface GigabitEthernet0/11
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet0/12
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet0/13
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet0/14
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet0/15
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet0/16
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet0/17
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet0/18
switchport access vlan 7
switchport mode access
!
interface GigabitEthernet0/19
!
interface GigabitEthernet0/20
!
interface GigabitEthernet0/21
!
interface GigabitEthernet0/22
!
interface GigabitEthernet0/23
!
interface GigabitEthernet0/24
!
interface GigabitEthernet0/25
!
interface GigabitEthernet0/26
!
interface GigabitEthernet0/27
!
interface GigabitEthernet0/28
!
interface Vlan1
no ip address
shutdown
!
interface Vlan5
ip address 10.1.5.1 255.255.255.0
!
interface Vlan6
ip address 10.1.6.1 255.255.255.0
ip helper-address 10.1.5.7
!
interface Vlan7
ip address 10.1.7.1 255.255.255.0
ip helper-address 10.1.5.7
!
ip classless
ip http server
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
line vty 0 4
password xx
no login
line vty 5 15
password xxx
no login
!
end
cisco_switch_b#
