Tunnel not stable#

ronald.ramzy · ‎07-25-2009

Hi,

My Setup is site-2-site VPN with mix of GRE with IPSEC Tunnel and IPSEC Tunnel.

Routing protocol is OSPF

All Sites are connecting to HQ

HQ to Site A

HQ to Site B

HQ to Site C

HQ to Site D

Some of the Tunnels are not stable, I suspect overlapping of network or could be another issue. But Working hours all looks OK.

How can i verify overlapping issues, if overlapping occurs how to overcome.

tstanik · ‎07-30-2009

If you are unable to access the internal network after the tunnel establishment, check the IP address assigned to the VPN client that overlaps with the internal network behind the head-end device.

Solution 1

Always make sure that the IP addresses in the pool to be assigned for the VPN clients, the internal network of the head-end device and the VPN Client internal network must be in different networks. You can assign the same major network with different subnets, but sometimes the routing issues occur.