Discovering Network Topology Post: 302414214

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Special Forums UNIX and Linux Applications Infrastructure Monitoring Discovering Network Topology Post 302414214 by nzeidat on Monday 19th of April 2010 12:45:33 PM

04-19-2010

Registered User

Topology discovery tool

Thank you sysgate for your reply.
I am not sure the first suggestion is feasible. This is a �controlled� project/deployment. The second suggestion is closer to what the team here seems to be marching towards, although the solution is still in the architecture phase, options are still being discussed. I am not sure, actually, whether RIP has any bearing on the solution (something I need to search). The group seems to agree that the solution needs to be implemented as part of the kernel (of a RT operating system, VxWorks) & that the solution takes the form of a �UDP or TCP socket based client/server model�. The �client kernel tasks� run on some workstations in the cluster of networks that make the environment. �Server kernel tasks� run on all routers. When a �client kernel task� is asked to find all possible paths between a pair of hosts and if that destination host is not on the local subnet, it turns around & asks that question to the �Server kernel task� running on its local router. If needed, routers will start communicating with each others asking each others the same question. Eventually, a router on the subnet where the destination address is reached and reply start going back. During the �reply back� phase buffers are getting populated with the interfaces, IP addresses, and other metrics, until the final reply reaches the host that initiated the request. The group thinks that the solution needs to be implemented in the network/IP layer and the lower.

I am not sure how this compares to the �traceroute, ping, SNMP, & DNS queries� solution you are suggesting. All these are applications on op of the network (IP) layer. Although they do similar things described in our �Client/Server� solution described above. !!!??? Any comments/thoughts??

nzeidat

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LEARN ABOUT DEBIAN

nrbroadcast

NRBROADCAST(5)						     Linux Programmer's Manual						    NRBROADCAST(5)

NAME

       nrbroadcast - NET/ROM routing broadcast configuration file.

DESCRIPTION

       Nrbroadcast  is	an ASCII file that contains information about each of the physical AX.25 ports that are to have NET/ROM routing broadcasts
       transmitted from them.

       Each line has the following format, each field being delimited by white space:

	      port minobs defqual worstqual verbose

       The field descriptions are:

	      port	    the port name of the AX.25 port to broadcast on.

	      minobs	    this is the minimum obsolescence count of a routing table entry to be broadcast on this port.

	      defqual	    this is the default quality of an incoming routing broadcast from an unknown neighbour.

	      worstqual     this is the worst quality node received from a routing broadcast that will be added to our routing table.

	      verbose	    whether the routes to all of my nodes in my routing table, or just the nodes resident on my machine are to	be  broad-
			    cast.

FILES

       /etc/ax25/nrbroadcast
       /etc/ax25/axports

SEE ALSO

       call(1), netrom(4), axports(5), netromd(8), nrparms(8).

Linux								   2 August 1996						    NRBROADCAST(5)