Table 1: Filter Set Element Evaluation Order And Action Selection; Table 2: Filter Content And Block Compatibility Examples - Avaya ERS 45 Series Technical Configuration Manual

Reason: conflicting actions – resolve conflict using evaluation order
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Reason: conflicting actions – resolve conflict using evaluation order

Table 1: Filter Set Element Evaluation Order and Action Selection

Filter Set Element Block Definition: filter set classifier elements can be combined into a block to make
better use of scarce resources. When installed, a single filter set classifier element consumes one
precedence level (i.e., resource usage equivalent to a policy referencing a single filter). A block containing
any number of filter set classifier elements still only consumes one precedence level (i.e., resource usage
equivalent to a policy referencing a filter block) when installed. Combining compatible filter set classifier
elements into blocks can substantially impact resource usage.
Which filter set elements can be combined into a block? As a general rule, classifiers matching the exact
same protocol fields or the exact same portions thereof (e.g., same IP address bits) are compatible. On
the ERS stackable platforms (i.e., 4XXX/56XX/59XX) and VSP7000 these restrictions have been eased
quite a bit. Classifiers matching the same protocol fields, regardless of the whether full or partial field
matches are specified, are compatible. Furthermore, filters matching different but compatible fields (i.e.,
fields from a hardware-defined set of compatible fields) can be combined into a block. Table 2 contains a
few examples of classifier content that is compatible and non-compatible for blocking purposes.
Filter Content
Filter A
Source IP 1.2.3.4/32
DSCP 23, Protocol TCP
Src MAC
11:22:33/FF:FF:FF
Dst L4 Port Min/Max 0/31
Destination IP 1.2.3.4/32
DSCP
Src L4 Port Min/Max
123/161
Dst MAC 08:81/FF:FF
Destination MAC

Table 2: Filter Content and Block Compatibility Examples

September 2015
Update DSCP: 46
Update DSCP: 0
Filter B
Source IP 5.6.7.8/32
DSCP 38, Protocol UDP
Src MAC
44:55:66/FF:FF:FF
Dst L4 Port Min/Max 0/31
Destination IP 5.6.0.0/16
TCP_Ctrl
Src L4 Port Min/Max
20/30
Src MAC
01:00:81/FF:FF:FF
Source IP
Avaya Inc. – External Distribution
Update DSCP: 46
Blocking Compatible
ERS55XX ERS56XX/ERS4XXX/ERS59XX
Yes
Yes
Yes
Yes
No
No
No
No
No
avaya.com
VSP7000
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
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