Avaya ERS 5510 - Port Range Functionality

Filt
Filters and QOS Configuration for Ethernet Routing Switch 5500
Technical Configuration Guide
12
January 2013
avaya.com
a) IP Classifier #1: src IP = 10.1.1.0/24
b) IP Classifier #2: src IP = 10.20.0.0/16
c) IP Classifier #3: src IP = 172.1.1.0/24
d) IP Classifier #4: src IP = 10.22.0.0/16
e) IP Classifier #5: src IP = 10.1.2.0/24, dst IP = 192.1.1.0/24
f) IP Classifier #6: src = 10.1.10.0/24
Classifiers a, c and f can be combined to create a classifier block if you wish to filter on these addresses
on a port(s). Classifiers b and d can be combined to create a second classifier block if you wish to filter on
these addresses on a port(s).
3.3 Port Range Functionality
The Ethernet Routing Switch 5500 has the ability to specify a range of values supported by the QoS data
model for several classification components (e.g., Layer 4 source and destination port numbers, VLAN Id
values). Range support is limited to a certain extent, however, because ranges are represented as a
bitmask within the overall classification mask, and not with explicit minimum and maximum values. A
range must thus be specified by indicating which bits in the given field (e.g., Layer 4 source port) are
„ignored‟ (i.e., set to 0). Taking into account this limitation, the following rules are used to determine valid
range values:
I. Minimum value: n
Maximum value: n
>> Example: min: 20 max: 20 (min = max equates to a range of 1)
II. Minimum value: 0
Maximum value: (2^n) – 1
>> Example: min: 0 max: 63 (n = 6)
III. Minimum value: even number
Maximum value: minimum port number in binary with rightmost consecutive 0‟s replaced with 1‟s
using the formula: Port Maximum = ((Port minimum + 2
n
) -1)) where n equal number of
consecutive trailing zero‟s.
>> Example: min: 128 max: 255 ((128 + 2
7
) – 1 = 255; 128 in binary has 7 consecutive trailing
zero‟s)
Specified ranges that do not adhere to one of these three rules cannot be supported and will be
flagged as erroneous.
The following table shows some examples of valid port ranges supported on the Ethernet Routing Switch
5500.