Warning: This article assumes intimate knowledge with the iptables/firewall service available on the platform. A mistake in configuration of iptables may impact service availability or access to the host. Any configuration provided is intended to be an example. Changes may be required to make it suitable.
RTP Packets can be marked when leaving the Media Broker; which can be inspected by the network infrastructure to enable QoS Policies to route packets appropriately. Packets which have been marked can be differentiated by network router; RTP traffic could be given a higher priority over packets which are not marked.
Iptables must be used to Mark Packets with a Differentiated Services Code Point (DSCP) value.
EF - Express Forwarding - will be used in the following examples.
More values are described here: Differentiated Services
Adding to an existing IP Tables Policy:
Run the commands:
|
iptables -t mangle -A OUTPUT -p udp -m udp --sport 16000 -j DSCP --set-dscp-class ef iptables -t mangle -A OUTPUT -p udp -m udp --sport 17000:17099 -j DSCP --set-dscp-class ef service iptables save |
Inspecting the /etc/sysconfig/iptables file:
|
#The Mangle Table *mangle |
Verifying the DSCP:
The following is an example Wireshark capture which shows the DSCP has been set on an output packet from Media Broker:
Comments
0 comments
Please sign in to leave a comment.