using ISAKMP through 3 router

[heng040731]

im a newbie and student that currently still learning about the cisco, im trying to use ISAKMP to allow access between 3 different network for my assignment but i can only ping to the router instate of the end device, only the hq network can ping each other, beside while im using "show crypto isakmp sa" to check if the isakmp is active, it will sometime active then disappear by itself.

any one know how to set up for it

[Flavio Miranda]

@heng040731 

 Not sure this will work in full mesh mode. I believe this can work in hub and spoke mode.  But,  I would not use 4331 for that. I would use 1841

 First, try to create the VPN between two routers. Then, when this work, try to create another tunnel.

[heng040731]

thank for help it is working while two router only but while i add a isp router between the router it become not working, might because of my config got problem but luckily my assignment requirrment actually not include wan part, so it is not a must for me.

[Flavio Miranda]

PacketTracer have some limitation. If you get one tunnel UP and running, you are good.