Avaya BSGX4e User's Guide Page 409

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BSGX4e Business Gateway User Guide 409
Release 01.01 NN47928-102
TCPdump Expressions
True if the packet has a source port value of port.
port port
True if either the source or destination port of the packet is port.
less length
True if the packet has a length less than or equal to length.
greater length
True if the packet has a length greater than or equal to length.
ip proto protocol
True if the packet is an IP packet of protocol type protocol. Protocol can be a
number or one of the following names—icmp, udp, or tcp. Note that the
identifiers tcp, udp, and icmp are also keywords and must be escaped through
backslash (\).
ip protochain protocol
True if the packet is an IPv4 packet and contains protocol of protocol type
protocol.
ether broadcast
True if the packet is an ethernet broadcast packet. The ether keyword is
optional.
ip broadcast
True if the packet is an IPv4 broadcast packet.
ether multicast
True if the packet is an ethernet multicast packet. The ether keyword is optional.
ip multicast
True if the packet is an IP multicast packet.
ether proto protocol
True if the packet is of ether type protocol. Protocol can be a number or one of
the following names—ip, arp, rarp, or stp. Note these identifiers are also
keywords and must be escaped through backslash (\).
ifname interface
True if the packet is logged as coming from the specified interface.
on interface
Synonymous with the ifname modifier.
ip, arp, rarp, stp
Abbreviations for ether proto p where p is one of the above protocols.
vlan [vlan_id]
True if the packet is an IEEE 802.1Q VLAN packet. If [vlan_id] is specified, the
only true packet has the specified vlan_id.
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