I need to configure a isolated network providing Internet access for visitors.
Since I have a routed backbone, I cannot use a end-to-end vlan, so I decided to use vrf with GRE.
I set up two routers (more spokes will follow) as shown in the picture and configured them like in the config files attached to this post.
Basically the configuration is working:
- 1811 router provides DHCP address to the client
- The client can ping his gateway, the tunnel i/f of the HUB and hosts on the Internet
Now I'm facing two (hopefully minor) problems:
1) If I want to surf the Internet, SOME websites don't work.
The browser hangs while loading the page. I checked if DNS is working and it does.
I also tried to set the MSS ("ip tcp adjust-mss 1360" on both tunnel i/f) and it works better but not perfect.
2) The DHCP server on the 1811 should exclude the IPs 10.9.250.1 - 10.9.250.127 from the DHCP pool.
I used the "ip dhcp excluded-address ..." command but I does not work. My Client always gets 10.9.250.2.
I hope someone can help me!
Thank you in advance,