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rumble7
join:2014-10-31

rumble7

Member

Simple Cisco NAT problem

Hello everyone,

Kind of new to enterprise networking. So, I have a simple problem that I am having trouble with. I can't seem to get internet to all my vlans that I made on my cisco 2800 series.

My network topography goes like this

Comcast modem(in bridge mode w/ static IPs)>Cisco 2800 series>Main Switch>Windows DHCP Server

My cisco config is »pastebin.com/1Mceevuv

My Vlans can all talk. I can ping google from the cisco router's CLI. I am at a loss. I know it's something I am missing having to do with NAT. Can anyone help out? Thanks! I hope I explain everything correctly.

kamikatze
join:2007-11-02

kamikatze

Member

So you're missing ip nat inside under most of your interface definitions.
Like this one: interface GigabitEthernet0/1.30

A few more things you need, an access list to match the traffic that gets translated and a statement for what NATs where:

access-list 1 permit 10.0.0.0 0.255.255.255
ip nat inside source list 1 interface YourISPInterfaceName overload
 
HELLFIRE
MVM
join:2009-11-25

HELLFIRE to rumble7

MVM

to rumble7
said by rumble7:

I can't seem to get internet to all my vlans that I made on my cisco 2800 series.

2nd kamikatze See Profile ... First : any VLAN wanting to get out onto the internet needs a "ip nat inside" added to it's config.

Second : you'll need the NAT ACL as kamikatze See Profile gave you.

If you want more configs to crib, may I suggest the Forum FAQ?

Regards