Setting diff classes on a single nic dot1q linux

Hi All, This is a Network setup that requires knowledge and understanding of 802.1q . I have a Linux box that is connected to a Cisco switch. I need to add multiple classes on a single NIC on the linux box. I'm almost done with the setup, but I'm having a difficult time finishing it. I can ping the additional classes on the linux box from OTHER boxes, that reside on SAME class. But, if you ping the server from a different class, it is not pingable. This is due probabaly to routing/gateway/reverse-routing or something like that. That's where I need you assistance. Here is my configuration: The setup in the Cisco switch is: 3550-FW#show interfaces trunk Port Mode Encapsulation Status Native vlan Fa0/3 on 802.1q trunking 1 Fa0/46 on 802.1q trunking 1 Port Vlans allowed on trunk Fa0/3 100,400 Fa0/46 100,200,400 Port Vlans allowed and active in management domain Fa0/3 100,400 Fa0/46 100,200,400 Port Vlans in spanning tree forwarding state and not pruned Fa0/3 100,400 Fa0/46 100,200,400 In my setup, we are going to use interface fa0/3 (fa0/46 is working with ESXi 4.1 and works well). My server (Linux - CentOS) has a one network interface with the following IP setup: 6.9.141.65 6.9.141.66 6.9.141.67 netwmask: [login to view URL] gateway: 6.9.141.1 I need to ADD another class on this NIC: [login to view URL] [login to view URL] [login to view URL] netwmask: [login to view URL] gateway: [login to view URL] Here are the setup of the files: /etc/sysconfig/network-scripts # less ifcfg-eth0 # Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet DEVICE=eth0 # BOOTPROTO=none # BROADCAST=6.9.141.127 HWADDR=00:0b:cd:ce:3e:b5 ONBOOT=yes ETHTOOL_OPTS="speed 100 duplex full autoneg off" # NETMASK=[login to view URL] # IPADDR=6.9.141.65 # GATEWAY=6.9.141.1 # TYPE=Ethernet /etc/sysconfig/network-scripts # less ifcfg-eth0.100 # Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet DEVICE=eth0.100 VLAN=yes BOOTPROTO=static ONBOOT=yes NETMASK=[login to view URL] IPADDR=6.9.141.65 GATEWAY=6.9.141.1 /etc/sysconfig/network-scripts # less ifcfg-eth0.100:0 # Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet DEVICE=eth0.100:0 VLAN=yes BOOTPROTO=static ONBOOT=yes #NETMASK=[login to view URL] #IPADDR=6.9.141.66 #GATEWAY=6.9.141.1 /etc/sysconfig/network-scripts # less ifcfg-eth0.400 DEVICE=eth0.400 VLAN=yes BOOTPROTO=static ONBOOT=yes IPADDR=[login to view URL] NETMASK=[login to view URL] /etc/sysconfig/network-scripts # less ifcfg-eth0.400:0 DEVICE=eth0.400:0 VLAN=yes BOOTPROTO=static ONBOOT=yes IPADDR=[login to view URL] NETMASK=[login to view URL] /etc/sysconfig/network-scripts # less /etc/iproute2/rt_tables # # reserved values # 255 local 254 main 253 default 0 unspec # # local # #1 [login to view URL] 100 eth0.100 400 eth0.400 I'm still not able to reach the vlan 400 if I ping it from OUTSIDE of the vlan. This is a simple project and should not take more than minutes to an hour (if few attempts to fix are done). The budget for this project is not going to exceed $50, so if you ask for more, you are just going to be ignored. Good luck to all and happy bidding.