13-2 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1
Chapter 13
These five parameters are referred to as a “5 Tuple”. Source or destination
addresses allow you to prioritize traffic between any combination of host,
subnet, and network addresses.
Further, if you specify a source 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. Fail ure to speci fy the Protoc ol
ID number will result in an error message and the ACL will not
be created.
Using a Protocol ID, you can 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 all owed 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 effect ively 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.