Switch config question

Leo Bruni · ‎10-10-2012

I have a test switch (Cisco 3550) that I want to set up with 6 Vlans and 2 trunk ports. I want to be able to access a virtual server conected to the trunk ports from the switch ports. Ports Fa0/1 to 8 are in a vlan port fa0/9 to 16 another vlan etc. Ports Fa0/47 and 48 are the trunk ports. This is a lab environment so the the switch is the only device being used.

Sandeep Choudhary · ‎10-10-2012

Hi,

do like this:

Creating vlans:

Config t

Switch(Config)#vlan2

Switch(Config)#vlan3

Switch(Config)#vlan4

Switch(Config)#vlan5

Switch(Config)#vlan6

assign IP ADDRESS TO vlans.

Switch(Config)#int vlan 1

Switch(Config)#ip address (ip) (mask)

Switch(Config)#no shut

Creat trunk ports like this:

config t

Int fa0/0

switchport mode dynamic desirable

switchport mode trunk

assign ports to vlan:

config t

int range fa0/1-8

Switchport access vlan 3

Hope you can do it now.If still getting problems then let me know.

Regards

Please rate if it helps

Giuseppe Larosa · ‎10-10-2012

Hello Leo,

if I have understood your question you would like to see the equivalent configuration to your requirements.)#

You haven't specified the IOS version running in the C3550

In the following I assume an old IOS using separate vlan database mode

switch#config t

switch (config)# vtp domain LAB

switch (config)# vtp mode transparent

switch(config)#end

switch #vlan database

swiitch(vlan)# vlan 2

switch(vlan)# vlan 3

swiitch(vlan)# vlan 4

switch(vlan)# vlan 5

switch(vlan)# vlan 6

switch(vlan)# vlan 7

switch(vlan)# apply

switch(vlan)# exit

switch# config t

switch(config)# interface range fas0/1 - fas0/8

switch(config-if)# switchport mode access

switch(config-if)# switchport access vlan 2

switch(config-if)# exit

switch(config)# interface range fas0/9 - fas0/16

switch(config-if)# switchport mode access

switch(config-if)# switchport access vlan 3

switch(config-if)# exit

....

switch(config)# interface fas0/47

switch(config-if)#switchport trunk enc dot1q

switch(config-if)#switchport mode trunk

switch(config)# interface fas0/48

switch(config-if)#switchport trunk enc dot1q

switch(config-if)#switchport mode trunk

If the IOS is newer you don't need to go to vlan database mode in any case you set the vtp mode to transparent

Edit:

L3 interfaces associated to the L2 Vlans (SVIs)

interface Vlan X

ip address A.B.C.D mask

no shut

Hope to help

Giuseppe

Leo Bruni · ‎10-10-2012

What routing statments do I need to go accroos the VLANs?

Sandeep Choudhary · ‎10-10-2012

Hi,

If you are using L3 switch...then u just need to config IP routing command .

just see the configration to get intervlan routing:

see the example:If you are configuring on Router

Create sub-interfaces, set 802.1Q trunking protocol and ip address on each sub-interface

Router(config)#interface f0/0
Router(config-if)#no shutdown

(Note: The main interface f0/0 doesn’t need an IP address but it must be turned on)

Router(config)#interface f0/0.0
Router(config-subif)#encapsulation dot1q 15
Router(config-subif)#ip address 192.168.15.1 255.255.255.0
Router(config-subif)#interface f0/0.1
Router(config-subif)#encapsulation dot11 20
Router(config-subif)#ip address 192.168.20.1 255.255.255.0

(Note: In the “encapsulation dot1q 15″ command, 15 is the VLAN ID this interface operates in)

Configure VLAN

Switch(config)#vlan 15
Switch(config-vlan)#name SALES
Switch(config-vlan)#vlan 20
Switch(config-vlan)#name TECH

Set ports to access mode & assign ports to VLAN

Switch(config)#interface range fa0/1
Switch(config-if)#no shutdown
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 15
Switch(config-if)#interface range fa0/3
Switch(config-if)#no shutdown
Switch(config-if)#switchport mode access
Switch(config-if)# switchport access vlan 20

----------------------------------------------------------------------------------------------------------------------------------------------------------------------

see the example:If you are configuring on layer 3 switch:

ip routing
!
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/3
switchport access vlan 20
switchport mode access

interface Vlan15
ip address 192.168.15.1 255.255.255.0
!
interface Vlan20
ip address 192.168.20.1 255.255.255.0

And on hosts just assign IP addresses and default gateways (to the corresponding interface VLANs) -> hosts in different VLANs can communicate.

Regards

Please rate if it helps.