[HECnet] GRE Peering

[Tomas Prybil]

On Fri, May 10, 2019 at 12:16:47PM -0600, Mark Berryman wrote:
> If you want, I will set up my router to accept dynamic GRE connections.  Then, anyone with a dynamic IP wanting to do GRE can connect to it.
Sure I would be happy to setup. I might need some assistance regarding
the mGRE config.

Thnk You Dave and Supratim for your connections. It looks like I now
have full connection to all areas looking from my decnet routing
table.

Sorry Fred for the confusion!

Nighttime here in Sweden. More coonfiguration to come!


BR
/t


> 
> Mark Berryman
> 
> > On May 10, 2019, at 11:30 AM, Tomas Prybil <tomas at prybil.se> wrote:
> > 
> > Thank you for all replies.
> > I've got area 33 as my own from Johnny so thats where hosts are
> > going til live when things are setup.
> > 
> > My ip is dynamic, but I've only got one change in a year. Hopefully I
> > will be able to change to static, but right now my isp only provides
> > dynamic. Changes are monitored and dynamically updates a dyndns
> > record.
> > 
> > On Fri, May 10, 2019 at 10:57:26AM -0600, Mark Berryman wrote:
> >> GRE tunnels can be built if one end is dynamic as long as your router supports multipoint GRE (mGRE).  Check and see if your router supports the command “tunnel mode gre multipoint” and that your tunnel supports commands that start with “ip nhrp “.  If so, then we should be able to set something up.
> >> 
> >> Mark Berryman
> > Yes it support both commands. It looks like that functionality was
> > introduced in 12.2
> > 
> > /t
> > 
> > 
> >> 
> >>> On May 10, 2019, at 10:12 AM, Supratim Sanyal <supratim at riseup.net> wrote:
> >>> 
> >>> Dynamic IP and GRE is a problem. Even if you have a dynamic DNS service set up (I am using duckdns.org <http://duckdns.org/>'s service happily for a while now if you need one), I don't know if Cisco IOS does a DNS lookup every time it loses a GRE connection to the destination, or even if a destination can be a domain name instead of an IP address.  There are fabulous GRE experts in this group who might chime in.
> >>> 
> >>> If the answer to all of the above is yes, and you are willing to move to area 31, I can give you a GRE tunnel end point on Area 31.
> >>> 
> >>> The other alternative is a MULTINET connection to area 31 which also I can provide if you wish. MULTINET is proven to be dynamic IP friendly.
> >>> 
> >>> Best,
> >>> Supratim
> >>> 
> >>> 
> >>> 
> >>> 
> >>> On May 10, 2019, at 10:43 AM, Tomas Prybil <tomas at prybil.se <mailto:tomas at prybil.se>> wrote:
> >>> 
> >>>> Dear fellow HECNETers
> >>>> 
> >>>> I’ve been using Johnnys bridge for a year or so, (thank you Johnny!) and wanted do some additional networking.
> >>>> Before going full gre peering is there anyone out there that could act as intermediate peer to do some testing while I try not to break anything (!)
> >>>> 
> >>>> On my side I have good network connectivity, but unfortunately no static IP :/
> >>>> The box I’m using is a 2610XM with ios ver 12.4
> >>>> 
> >>>> Happy if anyone is willing to share their connectivity
> >>>> 
> >>>> 
> >>>> BR
> >>>> /t
> >> 
>