3560 sw question

[dave dave]

hi! we've a few 3560 sw that run on flat network. Here's the config on one of the switch. Can i create another vlan eg. vlan10 in this switch as a backup vlan? I do not wish to add more vlans except the backup vlan10 and vlan10 do not need to be routable. The current clients shd still run on flat network (eg. in gi0/47). Will adding vlan10 in some of the unused ports affect the current operation? Thanks.

!

interface GigabitEthernet0/47

switchport mode access

spanning-tree portfast

!

interface GigabitEthernet0/48

switchport mode access

spanning-tree portfast

!

interface GigabitEthernet0/49

switchport trunk encapsulation dot1q

switchport mode trunk

channel-group 1 mode desirable

!

interface GigabitEthernet0/50

switchport trunk encapsulation dot1q

switchport mode trunk

channel-group 1 mode desirable

!

interface GigabitEthernet0/51

!

interface GigabitEthernet0/52

!

interface Vlan1

ip address 10.20.50.6 255.255.255.0

!

ip default-gateway 10.20.50.1

[fgasimzade]

What do you mean by "backup vlan"?

Basically, adding a new vlan will not affect current users.

[Jon Marshall]

No ti wouldn't affect current operation.

So to create vlan 10 at L2 -

3560(config)  vlan 10 name v10

this will now allow you to allocate ports into vlan 10 eg.

int gi0/10

switchport mode access

switchport access vlan 10

Jon

[fgasimzade]

If you dont want this vlan to be routable, do not create interface vlan 10. PC's in vlan 10 will only see each other, but will not communicate with vlan1

[dave dave]

hi! The objective is to use a different IP range and vlan for my servers to run backup job. Each additional NIC card in my servers will be assign a different IP range which is different from my production ip range. Will this work. Thanks.

[Jon Marshall]

Will this work.

Yes