Define The Traffic That Triggers The Connection; Specifying A Protocol - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

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Configuring Backup WAN Connections
Configuring Demand Routing for Backup Connections
3-18

Define the Traffic That Triggers the Connection

You must first define the interesting traffic—the traffic that triggers, or acti-
vates, the WAN connection. For example, if you are configuring demand
routing for a backup connection between the main office and a branch office,
the interesting traffic would be the packets destined for the branch office. The
ProCurve Secure Router will route these packets to the demand interface only
if the primary interface is down and the floating static route that you configure
for the traffic is activated in the routing table. (Floating static routes are
explained in more depth later in this chapter.)
To define the interesting traffic, you create an extended ACL. The ProCurve
Secure Router will use this ACL to identify and select interesting traffic.
From the global configuration mode context, enter:
Syntax: ip access-list extended <listname>
Replace <listname> with an alphanumeric descriptor that is meaningful to
you. The listname is case sensitive.
After you enter this command, you are moved to the extended ACL configu-
ration mode context and can enter permit and deny statements to define the
traffic that will trigger the dial-up connection. Use the following command
syntax:
Syntax: [permit | deny] <protocol> <source address> <source port> <destination
address> <destination port> [<packet bits>] [log | log-input]

Specifying a Protocol

When you create a permit or deny statement for an extended ACL, you must
always specify a protocol. Valid protocols include:
AHP
ESP
GRE
ICMP
IP
TCP
UDP
You can also specify a number between 0 and 255 for the protocol.

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