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Forum Replies

  1. In my lab , GNS3, running the command “tunnel mode ipsec ipv4” actually breaks VTI. I am unable to pass traffic . Once i remove that piece and keep the tunnel protection command then my VPN comes up. Do you know why?

    I am running C7200-ADVENTERPRISEK9-M code.

    Running a packet capture i see that traffic is indeed encrypted (ESP) over my “wan”.

  2. Not quite, I meant like this:

    You have to create a virtual tunnel interface and use an unnumbered IP.

  3. Hello Yuta

    IPSec functions in two modes. Tunnel mode and transport mode. Tunnel mode is when IPSec is the protocol that is used for tunneling and for encapsulation. This is the case when we configure the following:

    tunnel mode ipsec ipv4
    tunnel protection ipsec profile profile_name
    

    where the profile as shown in the lesson chooses to use the tunnel mode for IPSec.

    Whenever you choosetunnel mode ipsec ipv4 it is necessary to include the type of encapsulation mechanisms that you will use by indicating the tunnel protection command as well. These two commands t

    ... Continue reading in our forum

  4. Hi ,
    I try in virtaul lab same as you config but i don’t know why host 1 cannot ping host 2.Router to Router can ping.Host to host cannot reach

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