Patton CopperLink CL2300, User Manual, Page: 40 / 116

IP Context Overview Configuration Task List 40
CopperLink CL2300 User Manual 5 • IP Context Overview
Packet Processing To/From Local Applications
If the packet is not sent to a remote host, and is destined for a local application (e.g. CLI, the web server, or SIP
signaling packets), another set of packet-processing filters is traversed after the routing decision has been made.
In particular, another ACL profile dedicated only for locally-terminated flows is passed. This allows you to cre-
ate specific ACL profiles to protect the local device while having different ACL profiles for routed traffic.
After passing the ACL, voice data packets (RTP/SRTP) are diverted to the voice processing engine whereas the
remaining traffic reaches one of the running service applications.
Packets that have been generated by applications on the device also traverse a set of packet-processing filters-a
classifier to tag packets with a traffic-class, routing-table selection, and another outbound ACL for locally-gen-
erated traffic.
As shown at the top of figure 14 on page 38, the local packet-processing filters are not attached to a specific
logical IP interface. All packets to/from a local application rather pass the same set of filters. There is a special
local mode within the IP context in which classifier and ACL profiles for local applications can be attached.
The local mode also hosts routing-selection commands for locally-generated traffic (see chapter 12, “IP Rout-
ing” on page 89 for more information).
IP Context Overview Configuration Task List
The following sections describe the basic tasks involved in IP context configuration. Many parameters have
acceptable default values, which in most cases do not need to be explicitly configured. Hence not all of the con-
figuration tasks below are required. Depending on your application scenario, some tasks are mandatory while
others are optional. The following tasks use a bottom-up approach, starting from the ports, followed by the
interfaces and up to the services running on the device. Read through the tasks in order to learn a general
understanding of the whole network before moving onto more detailed instructions.
• Planning your IP configuration (see page 40 )
• Configuring physical ports (see page 41 )
• Creating and configuring IP interfaces (see page 41 )
• Configuring packet classification (see page 41 )
• Configuring Network Address Port Translation (NAPT) (see page 42 )
• Configuring static IP routing (see page 42 )
• Configuring Access Control Lists (ACL) (see page 42 )
• Configuring quality of service (see page 42 )
Planning Your IP Configuration
The following subsections provide network connection considerations for Ethernet ports. Patton recommends
that you draw a network overview diagram displaying all neighboring IP devices. Do not begin configuring the
IP context until you have completed the planning of your IP environment.
IP Interface Related Information
Setting up the basic IP connectivity for your device requires at least the following information:
• IP addresses used for Ethernet LAN and WAN ports