08-07-2009 07:06 AM - edited 03-11-2019 09:03 AM
Hi
I have ASA 5540 whose Gig2 interface is subinterfaced into 3-vlans 40,50,60.Do I need to trunk the port(cable is coming from ASA Gig2 interface) on the switch and create VLANS 40,50 and 60 on the switch in order to get the hosts in these vlans working ? Do I have to do anything to Gig2 interface ?Please see config below
______________________________________
interface GigabitEthernet0/2
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/2.40
vlan 40
nameif DMZ-Public
security-level 40
ip address 10.32.240.1 255.255.255.0 standby 10.32.240.2
!
interface GigabitEthernet0/2.50
vlan 50
nameif DMZ-2
security-level 50
ip address 10.32.241.1 255.255.255.0 standby 10.32.241.2
!
interface GigabitEthernet0/2.60
vlan 60
nameif DMZ-3
security-level 60
ip address 10.32.242.1 255.255.255.0 standby 10.32.242.2
08-07-2009 07:27 AM
your config on the ASA looks fine..on the switch, you will need to trunk the port using dot1q, and you will need to create those vlans - 40,50,60 - and allow them on the trunk port of the switch.
08-10-2009 08:04 AM
these VLANS on the swith need to have same subnet as firewall VLAN interfaces ?
in this case
on switch :
Interface VLAN 40
ip address 10.32.240.3
Interface VLAN 50
ip address 10.32.241.3
Interface VLAN 60
ip address 10.32.242.3
08-11-2009 08:38 AM
You don't need to create L3 vlans in the switch as you already have the firewall as a layer 3 device for those network. You just simply need to do what Steven indicated in his post.
Create the vlans in the switch
exmaple:
switch
WS1(config)vlan database
WS1(vlan)#vlan 40 name 10.32.240.0/24_net
WS1(vlan)#vlan 50 name 10.32.241.0/24_net
WS1(vlan)# vlan 60 name 10.32.242.0/24_net
then create dot1q trunk on the physical port in the switch that connects to the forewall..
SW1(config)#interface fe0/xx
SW1(config)#Description Connection to ASA
SW1(config)#switchport mode trunk
SW1(config)#switchport trunk encapsulation dot1q
SW1(config)#switchport trunk allowed vlan 40,50,60 etc..
then assign ports to respective vlans for hosts in the switch..
Regards
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