Sniffer® Portable Professional User's Guide - NetScout

Chapter 10
Drag and drop a symbolic address from the Known Address list
into the Station 1 or Station 2 fields. Known addresses come
from Broadcast Addresses, the Host Table, or the Address Book.
Define the address as either
a network hardware address
(6 bytes in hexadecimal
value) or a network IP or IPX
address (4 octets).
Select to include or exclude
packets that match the
address specification.
Start capture directly
from the Define Filter
dialog using this button.
226 Sniffer Portable Professional
Specify an
optional
subnet mask in
CIDR format.
Figure 10-2. Setting Address Filters
First, click to name the new filter.
Select which direction the traffic flows
by setting the Dir option.
Using CIDR Bit-Count Netmasks in the Address Tab
You can also just
type in an address
manually.
The Address tab lets you enter subnet masks in the Classless
Inter-Domain Routing (CIDR) scheme. CIDR uses a standard 32-bit IP
address with a short-hand version of the decimal netmask called a bit
count. For example, in the CIDR address 192.168.40.250 with a
netmask of 255.255.255.0, 24 is the number of bits in the netmask. So
the IP address and netmask can be written as 192.168.40.250/24.
If you don’t know your CIDR netmask, you can use Figure 10-3 to
convert your subnet mask to a CIDR bit count mask.