Q: What should I do if mouse functions aren't working
in the Topology?
A: This can happen when the keyboard Num Lock key or Scroll
Lock key is engaged. Disable the lock, then try the mouse functions again.
Q: What are the differences between the map views?
What do the colored squares in the "Campus" View represent?
A: The "Campus" Topology view is intended to represent a logical
network layout. Each campus consists of routers interconnected only by (Token
Ring, FDDI, Ethernet) networks. Campus boundaries are determined by Serial
Links, and shown as colored regions on the map. Each campus is labeled based
on the most common first three characters of router hostnames in that campus.
The "By-Name" view is a campus view in which routers whose names start with
the same first two letters are grouped in the same campus.
The "Flat" view, rather than combining devices into campuses, displays
them evenly distributed throughout the map. This dispersion makes the Flat
view useful for looking at small-to-medium sized networks (up to 75 routers),
as well as for displaying Round Trip paths. For very large networks (over
200 routers), the Flat view will take some time to produce when first selected,
although subsequent switching between views will be much faster. See the
How large a network can NSM
model? Does performance change with network size? question for more
The "RSRB" view is a logical representation of ring groups, virtual ring
groups, and associated routers within a SNA or Token Ring network.
The "OSPF" and "OSPF-Areas" views are logical displays of routers and networks
making up the "OSPF" network, where devices are grouped by OSPF area and
process ID, or by OSPF area only, respectively.
Q: In the AppleTalk View, why do some campus
names begin with "z_" and others begin with "zb_"?
A: If a router has all of its interfaces in the same primary zone,
it will appear in a "z_" campus. If a router has interfaces assigned to different
primary zones, it will be assigned to a "zb_" (zone border) campus.
Q: How does Netsys Service Manager (NSM) determine
the router type?
A: It is difficult to determine router type simply by looking at
the configuration file. In NSM 3.x, if the tool sees a "/" in an interface,
it assumes the router is a Cisco 7000. The data.router_types file in
the baseline can be edited to specify specific router types (look at the example
in the perf.tutorial baseline). NSM will pick up the router type from
data.router_types before generating the integrity check report. Additionally,
the router types can be set in a new scenario by selecting Display Parameters
-> Router Parameters -> Global Mib Info. Save the changes with the Save
Performance Data option.
I NSM version 4.1, the "Run Service Management Collection & Web Reports"
wizard allows you to collect Cisco router types.
Q: How does NSM model line speed?
A: The software uses the bandwidth statement from the router
configuration. If that is not present, it uses the default bandwidth for the
Q: I know I have parallel WAN links between
two routers, but why can I only see one?
A: Parallel WAN links are drawn as one in the topology to reduce
congestion. You can identify parallel WAN links by selecting the Parallel
WAN Links option in the "Find Device" window.
Q: Can I view primary links only in the topology?
A: There is a "Secondary LANs" toggle switch under the Show
menu in the topology window. Use this feature to omit/include secondary links.
Q: What does the thickness of serial links
(as drawn in the Topology) represent?
A: The different link widths in the Topology show the corresponding
bandwidth of that serial line. There are five possible widths, one for each
of the following bandwidth ranges:
The wider the line, the higher the bandwidth. If two different bandwidths
are indicated in the routing configuration files, the lower one is used.
Q: Why would an interface with assigned
IP address be left unconnected?
A: If an interface is assigned an IP address that is identical to
the subnet address, the interface is left unconnected (that is, a link between
the interface and the subnet to which it is connected is not created.)
Another possible cause is that the other router's configuration may be
missing in the baseline.
Q: Are all bridging routers modeled?
A: No, not all bridging routers are modeled. NSM models SRB, RSRB,
and DLSw+ bridging routers, which may result in unnecessary integrity checks
during the integrity check report as well as a cluttered or inaccurate topology.
Q: When I print a Topology, I get an "Output
to device successful" error message but nothing comes out on the printer.
A: When printing a topology, the print process outputs an "Output
to device successful" message even if an error external to the application
has occurred. Some things to check are:
The topology is printed as a PostScript file, so printing requires a
In the Print window, make sure that the device input field has the complete
and correct lp command (such as lp -Pprinter1). The correct
lp command is the same one you would use at the command line to
print a file.
Q: How can I print the topology if I don't have
access to a PostScript printer?
A: You can save the topology to a file, FTP the file to a PC, and
use the MS-DOS print command to print the file.