Efficient Networks 107-0001-000 manual Filter br add, Byte offset within a packet

Chapter 10: Bridge Filtering Commands	Efficient Networks® Router family
	Command Line Interface Guide

Input Format

filter br ?

Parameters

None

Response

Lists the supported bridge filtering commands and keywords and a brief description of their function.

filter br add

Adds a bridging filter to the filtering database. The filter can allow or deny the forwarding of packets based on the contents of the packets. The command specifies the position within the packet that is checked and the data that must appear in that location in order for the packet to match this filter.

Mgmt Class

Security (R/W)

Input Format

filter br add [pos] [data] allow deny

Parameters

<pos>a	Byte offset within a packet.
<byte>	Hexadecimal number up to 6 bytes.
allow	Allows forwarding of the packet(s).
deny	Denies forwarding of the packet(s).

aInteger, 0 - 127

Example

Example command prevents forwarding of RARP packets across the bridge. The data at byte offset 12 in each packet is checked and, if the data is hex 8035, the packet is denied forwarding.

-> filter br add 12 8035 deny

Response

Command prompt.

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