Cisco Asr 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide - Cisco ASR 9000 Series Configuration Manual

Broadband Network Gateway Overview
• BNG interoperates with Carrier Grade NAT (CGN)
To address the impending threat from IPv4 address space depletion, it is recommended that the remaining
or available IPv4 addresses be shared among larger numbers of customers. This is done by using CGN,
which primarily pulls the address allocation to a more centralized NAT in the service provider network.
NAT44 is a technology that uses CGN and helps manage depletion issues of the IPv4 address space.
BNG supports the ability to perform NAT44 translation on IPoE and PPPoE-based BNG subscriber
sessions.
Restrictions
• This topology is supported on nV Satellite, but not supported on BNG:
• This topology is not supported on nV Satellite:
OL-28375-03
• Non-bundle ports from the satellite out to the access network, and bundle ports between the Satellite
node and the ASR9K.
◦ Single Ethernet ports (non-bundle) on the CPE side of the Satellite node, connected to the ASR9K
through non-bundle configuration (static-pinning).
◦ Bundled Ethernet ports on the CPE side of the Satellite node, connected to the ASR9K through
bundle Ethernet connections.
Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide, Release
BNG Interoperability
4.3.x
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