Cannot Route between 2 Vlans on CIsco 1801 Integrated Services Router
Posted on 2009-04-21
I have a problem which is driving me crazy. I am just starting out with Cisco Equipment, and up until today, i have been doing quite well. My Setup is as follows:
ATM0.1 (Dialer1): Broadband is set up on this
Fast Ethernet 1: VLAN 1 is setup on this, and set to trunk mode
Fast Ethernet 2: VLAN 2 is setup on this, and set to trunk mode
VLAN 1: 192.168.5.0 - 192.168.5.255 (255.255.255.0)
VLAN 2: 192.168.10.0 - 192.168.10.255 (255.255.255.0)
An ethernet cable runs from Fast Ethernet ports 1 and 2 into the switch (which is a dumb (unmanaged) Gigabit Netgear Switch)
So what i am trying to achieve is to have the internal network on VLAN1, which everything is setup for at the moment, and have Guest WiFi Users on VLAN2. Currently i have a Belkin WIreless Access Point set up with an IP address on VLAN2, which runs back to Fast Ethernet 2 on the Router.
What i want to be able to achieve is to let all the DHCP broadcasts forwarded by the Wireless Access Point to be picked up by the cisco router on FE2 and passed across to FE1 where the DHCP server has a scope setup for this subnet, and assign it an ip address from the correct subnet. I was trying to use the ip helper-address command, however i just get an error message: % Invalid input detected at '^' marker.
From any computer on VLAN1, i can ping the interface of VLAN2. However, every client on VLAN2 is unable to even ping the interface of VLAN2, therefore from VLAN1 i am unable to ping any further than the interface of VLAN2, and from VLAN2 i am unable to ping anything at all!
I did wonder if this was anything to do with NAT being set up for VLAN1, enabling the users to be able to get out onto the web. The reason i think this is because before installing the router (it was in the lab with no internet connection and therefore no NAT) everything was great, and i had no such problems. The 2 VLANS could ping between each other and access resources on either network. IT only seems to be due to the introduction of NAT for users to access the internet, that this has happened. NAT is also set up for use on VLAN2, however with the users unable to even ping the interface of VLAN2, they cannot get out to the web either.
It may also be worth noting that i have set up most of this via the SDM as opposed to the command line, however i do have access to the command line via telnet. I having been slowing learning how to use this as i go along. I fully intend to learn this, however at the moment, i just need to be operational!
I have tried contacting Cisco, however they are not interested and state that my router which i bought 1 month ago has been out of warranty for 3 years. I am chasing the supplier on this at the moment.
Any comments or advise would be much appreciated.