[e2e] Spec for cable-based home networking
Jeff.Mandin at ti.com
Wed May 8 02:42:22 PDT 2002
The e2e (or midcom) communities might be interested in a
home networking standard called CableHome being promoted by
the Cable industry group CableLabs.
Currently CableHome is a specification for a Service Provider
-managed Residential Gateway unit (including a Firewall/
DHCP Server and coupled with a Cable Modem).
Features that might be of interest include:
1. Support for multiple "public" IP addresses behind a single
cable modem on a home network.
2. Explicit embrace of NAT. The spec gives the Service
Provider the ability to monitor or limit the number of hosts
on the home network using NAT.
3. The Residential Gateway unit does not include a DHCP relay
agent, so if multiple public IP addresses are present on the
home network, they might reside on different Logical IP
Subnets (LISes). CableHome requires the Residential Gateway
to maintain knowledge of individual IP addresses and intercept
and route packets destined to an in-home IP address regardless
of the packet's destination MAC.(Similar to the "Layer 3 bridge"
function of Windows XP or the Bay Networks SwitchNode).
4. No support for DSL-style ISP selection.
The MIB syntax allows for IPv6 definitions, but the spec doesn't
really deal with IPv6 currently.
The specification and MIBs are located at
Senior System Architect(Software)
Texas Instruments - Cable Broadband Communications
email: jeff.mandin at ti.com
More information about the end2end-interest