Comtech EF Data CME-5000 Manual - Manual (Page 76)

occur in the middle of an MPEG-2 packet. In this instance, with section packing, a new
MPE section begins immediately after the first MPE section has finished without any
‘fill’ (wasted) bytes having to be inserted before the start of the next MPEG-2 packet.
B.5 1,024 Routes
The MENCAP 50 is capable of providing up to 1,024 unique IP routes. Each IP route can
be configured as Unicast or Multicast. Additional routes may be supported by using the
Multicast Zones feature described in the next section.
Routes can be assigned to PIDs in the range 0x0010 to 0x1FFE (this excludes the
reserved PIDs as defined in ISO 13818-1)
B.6 10,000 Routes
The CEFD MENCAP 50-10K (CME-5010) is capable of providing up to 10,000 unique
IP routes. Each IP route can be configured as Unicast or Multicast. Additional routes may
be supported by using the Multicast Zones feature described in the next section.
Routes can be assigned to PIDs in the range 0x0010 to 0x1FFE (this excludes the
reserved PIDs as defined in ISO 13818-1). This feature requires a hardware enhancement
and is not supported on the standard MENCAP 50 platform.
B.7 Multicast Zones
The Multicast Zones feature allows the user to more efficiently configure the
Encapsulator when supporting multicasting. Using the IP subnetting techniques of
Unicast routing, Multicast Zones allows a single IP address to be specified on a route and
a subnet mask is assigned to the route.
The MENCAP 50 uses Classless Inter-Domain Routing (CIDR) notation in which a
‘slash’ followed by a decimal number is used to represent the number of bits for the
mask; e.g. /32 is 255.255.255.255 and /24 is 255.255.255.0.
The subnet mask defines how many multicast IP addresses are allowed to be mapped to a
single route. Care must be taken when using the multicast zone feature since IP traffic
present within the multicast zone will be routed over the network. An example of
multicast zone is as follows:
• Multicast Route = 239.0.10.1
• Multicast Zone Mask = 255.255.255.252
• Multicast groups mapped to the 239.0.10.1 route:
o 239.0.10.0
o 239.0.10.1
o 239.0.10.2
o 239.0.10.3
B-4