User Manual
47
(Figure 5.13.1)
Mirror Port
It defines a group of ports which are needed to be monitored. The device collects data from these
ports.
Monitored Port
It defines a group of ports which are used to monitor other ports. The device outputs the data
through these ports.
Watch direction
This parameter indicates the direction of the data. It includes 3 kinds of choices: "All", "Ingress" and
"Egress".
1. This function is not often used. Otherwise other port-based higher management function like RSTP,IGMP
SNOOPING
2. Port mirroring function can only deal with the normal FCS packets. It cannot deal with error data frames.
5.14 Basic settings
5.14.1 Device address
IP Address
IP address is a address of 32 bits length which is assigned to the device on the internet. The IP address
consists of two fields: the network number field (net-id) and the Host ID field (host-id). For can
conveniently manage IP address, IP addresses are divided into five categories. As blow:
Network type Address range Available IP network range
A 0.0.0.0
~
126.255.255.255 1.0.0.0
~
126.0.0.0
B 128.0.0.0
~
191.255.255.255 128.0.0.0
~
191.254.0.0
C 192.0.0.0
~
223.255.255.255 192.0.0.0
~
223.255.254.0
D 224.0.0.0
~
239.255.255.255 Non
E 240.0.0.0
~
246.255.255.255 Non
Others 255.255.255.255 255.255.255.255
A, B, C class address is unicast address; D class address is multicast address; E class address is
reserved to prepare for the future for special purposes.
IP address using dotted decimal.
Each IP address is represented as four decimal integers separated by
decimal points, each integer corresponds to a byte, such as, 10.110.50.101.
Subnet Mask
Mask is corresponding 32 bits number of IP address. Some are 1, the others are 0. These 1 and 0 can
be combined arbitrary in principle, but the first continuous bits are 1 when designing subnet mask. IP
address can be divided into 2 parts by subnet mask: subnet address and host address. 1 in IP address
and subnet corresponds to subnet address, other bits are host address. A type of address corresponding
mask is 255.0.0.0; mask of B type address is 255.255.0.0; mask of C type address is 255.255.255.0.
Default Gateway