Startup

In the Startup Guide we describe how to use the mcproxy, how to configurate and check the functionality. We describe a scenario and discusses where problems could arise.

Tables, Flags and Tools

At first we describe the Kernel tables which are used and manipulated by the mcproxy.

Tables (IPv4 | IPv6)

The following tables can be found under the path /proc/net/.The ipv6 tables shows the same contain like the ipv4 tables. But they are only available if you configure and compile your own Linux-Kernel. For more details see here.

• igmp | igmp6
  • This table shows the multiast group subscriptions of your system for every interface. The multicast group addresses are written in hexadecimal and network byte order (only for IPv4). For example an ip address like FEDCBA98 means 152.186.220.254. The mcproxy subscribe a multicast group on the upstream interface for every subscritption heard on the downstream side. This can be seen in the igmp table.
• ip_mr_vif | ip6_mr_vif
  • This table shows interfaces which are registarte to forward multicast traffic. These interfaces are identified by an virtual interface index (vif). All interface used by the mcproxy registrate here.
• ip_mr_cache | ip6_mr_cache
  • This table shows the multicast forwarding rules. All interfaces used in this table associated with a vif.

IPv6