Alcatel-Lucent 7750 SR-OS, Configuration Manual

Page: 409 / 674

Filter Policies
7750 SR OS Router Configuration Guide Page 409
Filter Policy Entities
A filter policy is applied to packets coming through the system, in the ascending order the entries
are numbered in the policy. When a packet matches all the parameters specified in a filter entry’s
match criteria, the system takes the specified action defined in that entry. If a packet does not
match the entry parameters, the packet is compared to the next higher numerical filter entry, and so
on. If the packet does not match any of the entries, the system executes the default action specified
in the filter policy. Each filter policy is assigned a unique filter ID. Each filter policy is defined
with:
• Scope
• Default action
• Description
• Filter Name that can be optionally used in CLI to reference this filter policy instead of
Filter ID (some exceptions apply)
• At least one filter entry
Each filter entry contains:
• Match criteria
• An action
• In addition, in a filter policy entry, an operator can also:

configure log ID to enable filter logging for this entry.

control how cflowd sampling is done for an IP interface based on IP interface cflowd
configuration and the filter entry cflowd configuration.