Avaya Cajun P580, Руководство пользователя, Страница: 412 / 770

13-2 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.0
Chapter 13
These five parameters are referred to as a “5 Tuple”. Source and/or
Destination addresses allow you to prioritize traffic between any
combination of host, subnet, and network addresses.
Further, if you specify source and/or destination TCP/UDP port, you can
prioritize specific traffic between hosts on two different networks. For
example, you could increase the priority of Voice Over IP (VoIP) traffic
between two subnets in a call center by specifying the UDP port number
used by the phone system.
* Note: If you specify TCP or UDP port numbers, you must specify
Protocol ID 6 or 17 respectively. Failure to specify the Protocol
ID number will result in an error message and the ACL will not
be created.
Protocol ID allows you to prioritize traffic based on the Protocol ID number.
RFC 1700 lists Protocol ID numbers. You could, for example, block all
RSVP traffic (Protocol ID 46) through the router.
Naming
Conventions for
ACLs
The Avaya Multiservice switch supports ACL names up to 32 characters
(Alpha-Numeric). Spaces are allowed in the names but are not
recommended. Instead of spaces, use the underscore “_” character.
ACL Names are entered when you create a rule. By using the same ACL
Name for multiple rules, you are effectively creating a list of rules. The
Access List Index determines the order of rules in the list. For that reason,
when you create a rule, you give the rule the Access List Name and the
Access List Index. No two rules in a list may have the same index.
If you create rules with different ACL Names, you have created different
lists. This is useful when you need more than one ACL. For example, you
may have one ACL for normal working hours, one ACL for nighttime
hours, and a third list for Holidays. When you enable (activate) an ACL, the
currently enabled (active) ACL is automatically disabled (de-activated). In
other words, there can only be one active ACL.
The only restriction on the amount of ACLs you can create is that the total
number of rules cannot exceed 512. So, you could create a single ACL with
512 rules; or one ACL with 300 rules and a second with 212 rules, etc. See
“
Creating Access Rules” for guidelines to consider when designing ACLs.
An ACL name can be a number. For example, you can create a list whose
name is 1 or 151. If you chose to use numbers, keep in mind the following
restrictions:
■
Numbers 1 through 99 are reserved for Standard type Rules ONLY.
So, for example, if you try to create an Extended Rule whose ACL
Name is 1, it will be rejected.