Ip Policy Forwarding - Cisco ASR 5000 series Product Overview

CDMA2000 Wireless Data Services

IP Policy Forwarding

IP Policy Forwarding enables the routing of subscriber data traffic to specific destinations based on configuration. This
functionality can be implemented in support of enterprise-specific applications (i.e. routing traffic to specific enterprise
domains) or for routing traffic to back-end servers for additional processing.
Description
The system can be configured to automatically forward data packets to a predetermined network destination. This can
be done in one of three ways:
IP Pool-based Next Hop Forwarding - Forwards data packets based on the IP pool from which a subscriber
obtains an IP address.
ACL-based Policy Forwarding - Forwards data packets based on policies defined in Access Control Lists
(ACLs) and applied to contexts or interfaces.
Subscriber specific Next Hop Forwarding - Forwards all packets for a specific subscriber.
The simplest way to forward subscriber data is to use IP Pool-based Next Hop Forwarding. An IP pool is configured
with the address of a next hop gateway and data packets from all subscribers using the IP pool are forward to that
gateway.
Subscriber Next Hop forwarding is also very simple. In the subscriber configuration a nexthop forwarding address is
specified and all data packets for that subscriber are forwarded to the specified nexthop destination.
ACL-based Policy Forwarding gives you more control on redirecting data packets. By configuring an Access Control
List (ACL) you can forward data packets from a context or an interface by different criteria, such as; source or
destination IP address, ICMP type, or TCP/UDP port numbers.
ACLs are applied first. If ACL-based Policy Forwarding and Pool-based Next Hop Forwarding or Subscriber are
configured, data packets are first redirected as defined in the ACL, then all remaining data packets are redirected to the
next hop gateway defined by the IP pool or subscriber profile.
AAA Server Groups
Value-added feature to enable VPN service provisioning for enterprise or MVNO customers. Enables each corporate
customer to maintain its own AAA servers with its own unique configurable parameters and custom dictionaries.
Description
This feature provides support for up to 800 AAA (RADIUS and Diameter) server groups and 800 NAS IP addresses that
can be provisioned within a single context or across the entire chassis. A total of 128 servers can be assigned to an
individual server group. Up to 1,600 accounting, authentication and/or mediation servers are supported per chassis and
may be distributed across a maximum of 1,000 subscribers. This feature also enables the AAA servers to be distributed
across multiple subscribers within the same context.
OL-22938-02
Features and Functionality—Base Software ▀
Cisco ASR 5000 Series Product Overview ▄