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

[Tuc at T-B-O-H.NET]

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
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