snmp topology - SNMP
This is a discussion on snmp topology - SNMP ; Hello,
We want to develop a network topology module in order to show graphic
representation of routing at customers sites. Could you guys point us
which technology should we use (i.e. snmp IP-FORWARD-MIB, dns, icmp,wmi
...) to succeed with this ...
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snmp topology
Hello,
We want to develop a network topology module in order to show graphic
representation of routing at customers sites. Could you guys point us
which technology should we use (i.e. snmp IP-FORWARD-MIB, dns, icmp,wmi
...) to succeed with this application. Any suggestions welcome 
thx,
Mark
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Re: snmp topology
Hey Mark,
I use MIB-2 system, ifEntry, ipNetToMedia, and the various Router
protocol extensions like the OSPF MIB and the BGP-4 MIB.
I try to stay away from using ipRouteEntry as it was designed to show
the route of a single network... If you walk it or Bulk it, it could
have an effect on the end device.... In Cisco devices, it appears as
though the Agent stub for this loads this table into a cache of sorts
which is then sequentially read. You can see its effect in memory
utilization and CPU usage.
Some of the gotchas that may seem confusing with Topology:
MPLS circuits. Yes, they are "imposed" over routed topology.
GRE Tunnels.
Physical circuits versus PVC mapping. PVCs go end to end while a
physical circuit may only go to the LEC on each end!
VPNs.
I do L2 as well... AtTable and Fdb from the Bridge MIB.
My initial beginnings are at http://www.phaults.com (I have GOT to get
my new stuff out there!!!)
Dougie!
