Buy or Renew
Buy or Renew
Duo Security forums now LIVE! Get answers to all your Duo Security questions. Learn more
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
1069
Views
0
Helpful
2
Replies

DHCP relay through IPSec VPN IOS routers

mljevakovic
Level 3
Level 3

‎03-23-2007 03:19 AM - edited ‎02-21-2020 02:56 PM

How can I implement and is it possible DHCP relay between two routers with IPSec VPN.

From one site clients need IP address from DHCP server on the other site.

Labels:
0 Helpful
2 Replies 2

aghaznavi
Level 5
Level 5

‎03-29-2007 06:52 AM

ip helper-address command to allow DHCP traffic over VPN. I found a configuration example to implement this command:

Try to apply this command on the same interface where crypto mpa is applied:

Router(config)#interface s0

Router(config-if)#crypto map mymap

Router(config-if)#ip helper-address 192.168.192.6

DHCP is sending a broadcast traffic and broadcast traffic is not supported over VPN. However, you may try to configure GRE over IPSec on your routers to implement this goal.

You may visit these links regarding GRE over IPSec:

http://cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008014bcd7.shtml

http://cisco.com/en/US/tech/tk828/technologies_configuration_example09186a00801a5aa2.shtml

0 Helpful

mljevakovic
Level 3
Level 3
In response to aghaznavi

‎04-01-2007 11:33 PM

Is it possible to do it without GRE because I have only one Public IP address per site. What I know GRE requests additional IP addresses, am I right?

0 Helpful
Customers Also Viewed These Support Documents