This document answers frequently asked questions about Cisco IP/TV
Technical Tips Conventions for information on document
I installed the client and server, started them both, and nothing
A. The IP/TV client and server operate similarly to a computer and an
application program. If you turn on the computer and expect your program to
start automatically, chances are that it will not, at least not until it is
configured to do so. The client and server both require configuration files to
operate correctly. These configuration files can be as complex or basic as you
like. The most basic are the SAMPLE files that are included and installed with
IP/TV. Here are the SAMPLE files:
SAMPLE.SVR—Sample file for the IP/TV server to play prerecorded
SAMPLE.CAP—Sample file for the IP/TV server to play captured video
from a capture device.
SAMPLE.SDP—Sample file for the IP/TV client to listen for multicast
(or unicast) video.
Refer to these files in order to understand how to configure the three
files to work with each other. In most cases, they can be used as-is for a demo
and connectivity test. Refer to
IP/TV Configuration and Demonstration for sample configurations of these
I installed the Program Guide and it does not
A. Here are a few items to check:
Did you go to the right URL?
Here is the correct URL:
Is Perl properly installed?
You can run the iptvmain.pl script from
the DOS promp in order to check the installation.
Note: If this script does not generate a page of HTML-style text, check
your Perl installation as well.
Are the virtual directories on the Microsoft Internet Information
Server (IIS) correctly configured?
If the directories are not correctly configured, the Program Guide is
installed, but the Perl script most likely will not execute or build the web
page. This issue is most likely due to a misconfiguration of the web server.
Make sure that the server (if NT) runs IIS v2.0 or v3.0 (IP/TV is not
compatible with IIS v1.0). If so, check to see if the proper virtual paths are
set up in the IIS configuration.
The Program Guide should look similar to this
Everything is working, but my notebook computer does not receive any
video (or is very slow).
A. Notebooks are notorious for slow video (they typically use video cards
with only 1MB of VRAM). Many notebooks perform at only four to five frames per
second (FPS) at best. This is due to insufficient video RAM and also because
the video chips used are inherently slow (S3-based video chipsets are the
fastest at this time).
Another common problem with notebook computers is with their network
interface cards (NICs). Most use the PCMCIA standard NICs, and many of these
PCMCIA NICs are not multicast-capable. In order to verify this problem, set up
IP/TV to operate in unicast mode as described in
IP/TV Configuration and Demonstration. If it works in unicast mode, then
the NIC is most likely the problem. In order to resolve this issue, you must
contact the NIC vendor. In most cases, the vendor can provide a firmware or
software update that will make the card multicast-capable.
IP/TV works on one subnet, but does not work across interfaces on my
A. Most likely IP/TV does not work across the router interfaces because
multicast/multicast routing is not enabled on the router. These commands set up
a Cisco IOS router for multicast traffic across Ethernet 1 and Ethernet 3:
router(config)#int ethernet 1
router(config-if)#ip pim dense-mode
router(config-if)#int ethernet 3
router(config-if)#ip pim dense-mode
In some companies, PIM dense-mode might not be appropriate. In these
cases, sparse-mode PIM can be used as well. (You might need to add the
rendezvous point as well in sparse-mode.)