This will work, we have many routers configured with the serial link (going to ISP) as ip unnumbered ethernet 0/0. The only additional command you will need is "crypto map rtp local-address FastEthernet0/0"
Doug -----Original Message----- From: Firesox [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 18, 2002 7:25 AM To: [EMAIL PROTECTED] Subject: IPSec on IP unnumbered with 3DES [7:49113] Folks I have 2621 trying to bring up IPSec tunnel using 3DES. My ethernet interface is assigned a public IP and serial is using IP unnumbered to the ISP. Default route is set to ip route 0.0.0.0 0.0.0.0 s0/0. I do have a firewall doing the NAT. so the network is like this. LAN - BRICK(firewall) - Router - ISP I haven't been successfull on getting the IPsec trunnel to my business partner who is using VPNet from Avaya. Their config seems to be fine. I am getting conflicting information on IP unnumbered interface. One source tells me IPSec cannnot be terminated on an interface with ip unnumbered assigned. Some tell me I can. Anyone know the answere to this? Anyone have an example config on 3DES and IP unnumbered? Thanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49117&t=49113 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

