Hi
Management vlan (for switches) = 192.168.4.0/28 = vlan 2
Server vlan = 192.168.5.0/24 - vlan 3
User vlan = 192.168.6.0/24 - vlan 4
Point to point link from 3550 to 2811 router
192.168.7.0/30
On 3550
3550(config)# ip routing
3550(config)# vtp domain "domain name - you choose"
3550(config)# vtp mode server
Connect your 2950 switches to the 3550 switch.
On the ports that connect the switches
int fa0/24
switchport trunk encapsulatioin dot1q
switchport mode trunk
You need to do this on either end of the link connecting the switches together. Note the "switchport trunk encapsulation dot1q" command may not be available on the 2950. Don't worry, just enter "switchport mode trunk".
If you are using rj45's to connect switches together you should use a cross over.
On the 2950's
2950(config)# vtp domain "same name as you used on 3550"
2950(config)# vtp mode client
On the 3550 switch you need to create the vlans
3550(config)# vlan 2
3550(config-vlan)# mgmt_vlan
3550(config)# vlan 3
3550(config-vlan)# name server_vlan
3550(config)# vlan 4
3550(config-vlan)# name client_vlan
The layer SVI's are next
on the 3550 switch
int vlan 2
ip address 192.168.4.1 255.255.255.240
no shut
int vlan 3
ip address 192.168.5.1 255.255.255.0
no shut
int vlan 4
ip address 192.168.6.1 255.255.255.0
no shut
You then connect the router to the 3550 switch. On the port that connects the 3550 to the router
3550(config-if)# no switchport
3550(config-if)# ip address 192.168.7.1 255.255.255.252
On the interface on the 2811 that connects to the 3550 switch
2811(config-if)# ip address 192.168.7.2 255.255.255.252
On the 2950 switches create a layer 3 SVI for vlan 2 only - this is so you can telnet to these switches to manage them
2950(config)# int vlan 2
2950(config-if)# ip address 192.168.4.2 255.255.255.240
2950(config-if)# no shut
2950(config)# ip default-gateway 192.168.4.1
For the second 2950 just use 192.168.4.3 as the address for the vlan 2 interface.
Last the routing.
You don't say which image you have on the 3550 switch. You can do the routing either with static routing or if you have teh advanced image you can use a routing protocol such as EIGRP.
As it a small setup lets use static routing.
On the 3550
3550(config)# ip route 0.0.0.0 0.0.0.0 192.168.7.2
this is the default route and any traffic that is not for vlan 2, 3 or 4 will get forwarded to the 2811 router.
On the 2811 router
2811(config)# ip route 192.168.4.0 255.255.255.240 192.168.7.1
2811(config)# ip route 192.168.5.0 255.255.255.0 192.168.7.1
2811(config# ip route 192.168.6.0 255.255.255.0 192.168.7.1
These routes allow the 2811 router to forward any packets for your vlans to the 3550 switch.
*** Edit - one thing i forgot to mention. When you then allocate your servers, clients into their correct vlans you need to use the corresponding L3 SVI ip address as the default-gateway. So in the exmaple used above when you configure the addressing on the actual server the default-gateway would be set to 192.168.5.1. For user pc's it would be 192.168.6.1. ***
HTH
Jon
