Руководство По Устранению Ошибки для Cisco Cisco Packet Data Gateway (PDG)
Policy Forwarding
▀ Overview
▄ Cisco ASR 5000 Series Enhanced Feature Configuration Guide
OL-22982-01
Overview
The system can be configured to automatically forward data packets to a predetermined network destination. This can
be done in one of three ways:
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.
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.
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.
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.
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.