Streaming Media Supplement sa2150 and sa2250

Chapter 7 Configuring Media-IXT for RealNetworks

For this configuration example we assume:

• a Media-IXT host, whose IP address is 10.10.10.10

and which answers to

front.myreality.com

• an origin RealNetworks server where our RealNetworks streaming content resides; its IP address is

11.11.11.11, and it answers to back.myreality.com

To configure reverse proxy caching for RealNetworks:

1. Set the proxy.config.reverse_proxy.enabled variable in the records.config file on the

Media-IXT host to

(true).

2. Edit the remap.config file on Media-IXT, adding

map

and reverse_map

rules. Note that the trailing

slashes in all of the rules are required.

Add the RTSP map rule:

map rtsp://front.myreality.com/ rtsp://back.myreality.com/

3. If our Media-IXT is performing reverse proxy for an origin QuickTime server as well as an origin

RealServer, we need separate sets of rules for each origin server, and we must add tags to the rules to specify

the protocol to which each rule applies.

Assuming that this is so, and that the origin QuickTime server answers to back.myquickness.com,

our rules would be:

map rtsp://front.myreality.com/ rtsp://back.myreality.com/ RNI

map rtsp://front.myreality.com/ rtsp://back.myquickness.com/ QT

4. After you modify the remap.config file, tell Media-IXT to re-read its configuration files. From Media-

IXT’s bin directory, run the command:

traffic_line -x

For RealNetworks and QuickTime, map rules only are used. For WMT, map and reverse_map rules are

used.

A port number appears in a remapping rule only when it is a non-standard port. So, if you use port 1091 for

RTSP, which is Media-IXT’s standard port for that protocol, your map rule takes this form (note that an RNI

tag can be added if desired):

map rtsp://front.myreality.com/ rtsp://back.myreality.com/

If you use a non-standard port for RTSP, say 9090, the rule must specify the port:

map rtsp://front.myreality.com:9090/ rtsp://back.myreality.com/

Configuring reverse proxy for a RealNetworks server farm with a layer 4 switch

For an explanation of where and why this procedure is needed, see “Server farms” on page 11.

To configure reverse proxy for a RealNetworks server farm with a layer 4 switch:

1. Contact HP Technical Support to obtain a patched version of the HP Caching plugin for RealServer

(inktpln.so.6.0 on UNIX; inkpln.dll on Windows).

2. You can verify that the file you have is patched by seeing if TSVirtualIP appears anywhere in the

plugin. Examine the response to the command:

strings inktpln.so.6.0 | grep TSVirtualIP

NOTE For RealNetworks and QuickTime, remapping rules use Media-IXT’s hostname and not

its IP address. Only WMT remapping rules use Media-IXT’s IP address.