![cisco router on a stick with nat cisco router on a stick with nat](https://www.cisco.com/c/dam/en/us/support/docs/ip/network-address-translation-nat/13770-1a.gif)
- Cisco router on a stick with nat how to#
- Cisco router on a stick with nat pro#
- Cisco router on a stick with nat series#
Server receives the packet and replies back When NAT-Router receives that packet back on outside interface, it translates the packet as per the static nat entry and forwards the packet to the server. The ISP notes the destination address (202.2.2.222) is routed back out the same interface it came in on, and the traffic comes back to the gig0/1 interface. Routing takes place, and the router sends this traffic out the fa0/0 interface.As this occurs, the source IP address is translated since it has traversed both a NAT inside and outside interface Host1 browser now attempts to make a connection with 202.2.2.222 and sends the traffic to its default gateway, fa0/1. We can fix this issue if only we add a static nat entry.Let us see the traffic flow: Solution 1: Only one static nat entry is required however traffic will go out to ISP twice before it reaches back to client and should not be advisable to configure in customer networks. The packet will be dropped after TTL expires
Cisco router on a stick with nat pro#
Pro Inside global Inside local Outside local Outside global
![cisco router on a stick with nat cisco router on a stick with nat](https://i1.wp.com/ipwithease.com/wp-content/uploads/2015/04/nat-on-stick.png)
![cisco router on a stick with nat cisco router on a stick with nat](https://networklessons.com/wp-content/uploads/2013/02/nat-2-hosts-inside-outside-1.png)
Since there is no nat entry matching that traffic on NAT-Router and it will again forward the traffic out to outisde interface and a loop has occured. The ISP notes the destination address (202.2.2.222) is routed back ou the same interface it came in on, and the traffic comes back to the outside fa0/1 interface on the NAT router. Can ping their gateways, but not the outside world.I think something is up with my NAT/PAT setup even though I followed the video to a T.I do have a slightly more complex setup since I'm using router on a stick.I'm only trying to get vlan 10 being able to reach the internet before adding the others.If you have any ideas please comment below.I'll be leaving in about 3 hours so I may not answer after then but I'll do my best to get back.If one of you is willing to troubleshoot with me over voice/video chat I'm open to that.Īs a side note, vlan 88 is NOT in the on the inside for IP nat as it's used for management, no need to have it reach outside.6. The vlan interfaces on the switch can ping the router, but not the outside world.Same goes for clients. And the set up was fairly simple.I can ping to the outside world from every interface with an IP on the router.
Cisco router on a stick with nat how to#
I followed a Youtube video on how to setup my cisco router to connect to my cable modem without having to use a consumer router as an intermediary device (turns out i just needed to use ip address dhcp on the outgoing port). I just threw it together in like 10 minutes.
Cisco router on a stick with nat series#
I just recently got my 2900 series Cisco router in and my network topology looks a bit like thisSorry if it's messy. I'm only online because I went back to my consumer network setup. SOLVED: Apparently SVIs on switches cause NAT issues? idk