[c-nsp] Something like MTR, but forced path

[Min]

Hi Tuc,

Not a perfect solution... you can open multiple xterm and each
fire up a mtr to one of the IPs you are interested.  mtr has an
option (-f? I don't remember exactly) allow you to specify hop n
to start your ping.

Min

On Dec 18, 2007 11:29 PM, Tuc at T-B-O-H.NET <ml at t-b-o-h.net> wrote:
> Hi Phil,
>
>         Thanks. Took a look at that. Its what led me to find fping. Only thing
> that makes fping not the final solution is no curses display.
>
>                 Thanks, Tuc
>
> >
> > 30 seconds of google searching turned up this:  http://mteixeira.webset.net/pmping/
> >
> > Phil
> >
> > On Dec 18, 2007, at 9:01 PM, Tuc at T-B-O-H.NET wrote:
> >
> > >>
> > >> Tuc at T-B-O-H.NET wrote:
> > >>
> > >>> Problem we have is a small wireless network is basically flat, not
> > >>> networked. There are 10 pieces of equipment between 2 machines.
> > >>> However,
> > >>> they are both on the same subnet, so it just looks like it only
> > >>> needs to
> > >>> hop once. Instead, it goes from the router, to a client antenna
> > >>> (IP'd),
> > >>> to an Access Point (IP'd), to a switch (IP'd), to a backhaul
> > >>> (IP'd), to
> > >>> another backhaul(IP'd)... You get the jist. I basically want to
> > >>> force the
> > >>> system to believe my path, not what routed networking tells it.
> > >>
> > >> traceroute shows a layer 3 path.  Your client antenna, access point
> > >> etc. are
> > >> bridging - a layer 2 activity.
> > >>
> > >> If you want to 'force' extra hops, you need to have each device
> > >> decrement the
> > >> TTL of forwarded IP datagrams and correctly send ICMP unreachables.
> > >>
> > >> There is some Layer 2 traceroute functionality built in to Cisco
> > >> kit, useful to
> > >> trace paths through a network that may change due to Spanning Tree
> > >> - but I have
> > >> to ask, what are you trying to achieve here?
> > >>
> > > Hi,
> > >
> > >     Sorry, I think I'm being seriously misunderstood.
> > >
> > >     Yes, I understand l3/l2.
> > >
> > >     I'm not looking for something that will "autodetect the path" via any
> > > sort of methods. I'm basically looking for something I can run on
> > > Unix and
> > > give me a curses view of IPs I give it to ping at the same time. I
> > > was looking
> > > on this list only because people here tend to either know or use the
> > > "kewl tools".
> > > I found something that sort of does what I want, fping, but it
> > > doesn't have the
> > > display part. Curses MTR bolds the lettering when it has a ping loss
> > > which I want
> > > to catch my eye.
> > >
> > >     As an FYI, the problem I have is I'm having connection losses
> > > between my
> > > site and the wireless WISP's gateway. I think the packet is getting
> > > to the
> > > backhaul link at the site here, but not to the other end of the
> > > backhaul here.
> > > I want to run a set of pings basically that are :
> > >
> > > 1 - My router
> > > 2 - My antenna
> > > 3 - His AP at SiteC
> > > 4 - His switch at SiteC
> > > 5 - His BH at SiteC
> > > 6 - His BH at SiteB2C
> > > 7 - His switch at SiteB
> > > 8 - His BH at SiteB2A
> > > 9 - His BH at SiteA2B
> > > 10- His switch at SiteA
> > > 11- His router at SiteA
> > >
> > >     I want something formalized since sending pings that just show
> > > a loss somewhere in the middle don't mean anything.
> > >
> > >             Thanks, Tuc
> > > _______________________________________________
> > > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>