[j-nsp] ipip and gre interfaces

[Chris]

Blaz,

You are going to have to spring for the tunnel PIC if you want route across the tunnel interface.

Chris

--- Blaz Zupan <blaz@inlimbo.org> wrote:
>I have two upstream STM-1's to two different upstream ISP's connected to two
>M5's located in different POPs and two local E3's connecting the M5's. I'd
>like to somehow backup the E3's in case they fail (they are going through the
>same telco). I thought I'd build a tunnel between the two STM-1's in case the
>E3 fails. I don't have a tunnel PIC in any of my M5's and don't want to get on
>just to build this tunnel (it would probably be cheaper to move one of the
>E3's to another telco and get redundancy this way, which is what I'll
>probably eventually do).
>
>What is the usefulness of the ipip and gre interfaces (not the gr-x/x/x and
>ip-x/x/x interfaces you get when you have a tunnel PIC)? I successfuly built a
>tunnel between the M5's with the ipip interface and can ping the other side
>through the tunnel, but trying to route through the tunnel I get a network
>unreachable for every packet. Configuration was something like
>
>interfaces {
>  ipip {
>    unit 0 {
>      tunnel {
>        source 192.168.1.1;
>        destination 192.168.2.1;
>      }
>      family inet {
>        address x.x.x.x/30;
>      }
>    }
>  }
>}
>
>... and the opposite on the other side.
>
>Is the usage of those ipip and gre interfaces documented anywhere? I wasn't
>able to find any documentation on them.
>
>Any help will be appreciated.
>
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