Hi, our subcontractors have finished the switch install, consisting of two Catalyst 3550 switches connected to each other via a trunk on port 47, with clients and other switches tagged off these switches.
Im having a little trouble understanding the configuration, why has the client switch got an ip address of 192.168.2.10? From my understanding it shouldnt need an address as any packets arriving on its interface will be routed across trunk between the client and core switch, where the core switch will handle the routing?? Or am i totally offtrack? When i remove VLAN3 ip address from the client switch the entire lot goes down, it is obviously needed but i dont understand why.
CORE CONFIG
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
no service password-encryption
service sequence-numbers
!
hostname core
!
no aaa new-model
ip subnet-zero
ip routing
!
no file verify auto
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
spanning-tree vlan 1-3 priority 0
!
vlan internal allocation policy ascending
!
interface GigabitEthernet0/1-20
spanning-tree portfast
!
interface GigabitEthernet0/21-35
spanning-tree portfast
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet0/36-46
spanning-tree portfast
switchport access vlan 3
switchport mode access
!
interface GigabitEthernet0/47
description connected to client as a trunk to port 47
switchport access vlan 3
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet0/50
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet0/51
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet0/52
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
ip address 192.168.0.2 255.255.255.0
ip helper-address 192.168.0.31
ip helper-address 192.168.0.28
!
interface Vlan2
ip address 192.168.1.1 255.255.255.0
ip helper-address 192.168.0.31
ip helper-address 192.168.0.28
!
interface Vlan3
ip address 192.168.2.1 255.255.255.0
ip helper-address 192.168.0.31
ip helper-address 192.168.0.28
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.0.1
ip http server
!
end
CLIENT CONFIG
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
no service password-encryption
service sequence-numbers
!
hostname client
!
no aaa new-model
vtp domain cisco
vtp mode transparent
ip subnet-zero
ip routing
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
vlan 3
name UsersAccess
!
interface GigabitEthernet0/1-46
switchport access vlan 3
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet0/47
description connected to Core Switch As a trunk port
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
ip address 192.168.0.5 255.255.255.0
ip helper-address 192.168.0.31
ip helper-address 192.168.0.28
!
interface Vlan3
ip address 192.168.2.10 255.255.255.0
ip helper-address 192.168.0.31
ip helper-address 192.168.0.28
!
ip classless
ip http server
!
end
Many thanks in advance,
Chris
