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Using Traffic Filters

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You can also improve application response time and prevent session timeouts by

implementing protocol prioritization.

Combine Filters

On most interfaces, you can apply as many as 31 inbound and 31 outbound traffic

filters for each protocol. You can configure IP interfaces to support as many as

127 inbound traffic filters.

As you add filters to an interface, the Configuration Manager numbers them

chronologically (Filter No. 1, Filter No. 2, Filter No. 3, and so on). The filter rule

number determines the filter’s precedence. Lower numbers have higher

precedence; Filter No. 1 has the highest precedence. If a packet matches two

filters, the filter with the highest precedence (lowest number) applies.

After you create traffic filters, you can change their precedence by reordering

them. See “Changing Filter Precedence” in Chapter 6

(inbound traffic filters) or

Chapter 7 (outbound traffic filters).

Build a Firewall

If your filtering strategy involves blocking most or all inbound traffic (a firewall)

you can create a Drop-all filter for each protocol on the interface. That means for

each protocol you are filtering, you choose a filter criterion that appears in every

packet of the protocol (for example, a MAC address).

You can also create exceptions to the Drop-all filter by adding more-specific,

higher-precedence filters to allow only specified traffic on an interface. See

“Using a Drop-All Filter as a Firewall” in Appendix B

for more information about

combining filters to accept certain traffic.

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Avaya Configuring Traffic Filters and Protocol Prioritization Manuale Utente Pagina 25