routing and NAT works for a /24 but not for a /16

RouterOS Beginner Basics
1

Hello,

I am new to the mikrotik world.

I have a RB-450G and I try to configure it as a standard router. No fancy stuff really.
I just want a powerfull router with a BIG pool off addresses, and the router to be as fast as possible.
I have some Linksys WRT54GL and Ubiquiti Air Routers in hand, but the RB450G is much more powerful and I would like to use it for an event this week end.

I have followed the following video : http://www.youtube.com/watch?v=YEXGqt5QG08&list=UUMk5J1e7dQMd3th3SZESoeA&index=6&feature=plcp
I was able to configure everything for a /24 subnet. So basically i am stuck with 250 ish max clients.

I would like to use a /16 subnet in order to have no problem with this.

so I did configure everything.
for testing purposes, I have limited the DHCP address pool to 172.16.0.50 → 172.16.0.100

But when I configure everything on a 172.16.0.0/16 network :

  • from the RB450G : i can ping the internet : 8.8.8.8 , http://www.google.com, etc
  • from my computer : I obtain an Ip in the 172.16.0.0/16 subnet : 172.16.0.100/16
  • from my computer : i can ping the LAN port of the RB450G : 172.16.0.254.
  • from my computer : I can’t ping 8.8.8.8 neither http://www.google.com

Nat and masquerade is set.

I have checked 10 times everything, i can’t find a solution.
I have also updated the router on the latest version available

There is a backup of my router config attached.
Edit : I attach the export file too, as Biomesh asked me just bellow

Please can you help me ? I work for a non-profit association. I want to use this router for an important event this week end.
export.zip (4.44 KB)
MikroTik-02011970-0007.zip (4.55 KB)

2

A backup file won’t help - you will need to provide either
(preferred - if you are on ROS 5.12 or later)

/export compact file=export

or

/export file=export

Attach the export.rsc that is created back to this thread.

3

Hello Biomesh !

Thank you very much for offering your help.
I executed the command /export file=export from a terminal opened in the dude

I join the file to this message

Please let me know if there is anything I can do, I went to bed at 3AM yesterday because of this, trying to find a solution. Very frustrating !
export.zip (4.44 KB)

4

Hello,

The event i was talking about will begin tomorrow morning. I am using an Air Router for this but this will cause problems because the hardware is only 200 Mhz proc / 32MB ram.
Please can someone have a look on the export file and let me know what I did wrong in my config ?