HP 6125G HP 6125G & 6125G/XG Blade Switches Network Management and Mon - Page 83

Configuring port mirroring, Introduction to port mirroring, Terminologies of port mirroring

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Configuring port mirroring Introduction to port mirroring Port mirroring is the process of copying the packets passing through a port to the monitor port connecting to a monitoring device for packet analysis. Terminologies of port mirroring Mirroring source The mirroring source can be one or more monitored ports. Packets (called "mirrored packets") passing through them are copied to a port connecting to a monitoring device for packet analysis. Such a port is called a "source port" and the device where the port resides is called a "source device". Mirroring destination The mirroring destination is the destination port (also known as the monitor port) of mirrored packets and connects to the data monitoring device. The device where the monitor port resides is called the "destination device." The monitor port forwards mirrored packets to its connected monitoring device. A monitor port may receive multiple duplicates of a packet in some cases because it can monitor multiple mirroring sources. For example, assume that Port 1 is monitoring bidirectional traffic on Port 2 and Port 3 on the same device. If a packet travels from Port 2 to Port 3, two duplicates of the packet will be received on Port 1. Mirroring direction The mirroring direction indicates that the inbound, outbound, or bidirectional traffic can be copied on a mirroring source. • Inbound: Copies packets received on a mirroring source. • Outbound: Copies packets sent out of a mirroring source. • Bidirectional: Copies packets both received and sent on a mirroring source. Mirroring group Port mirroring is implemented through mirroring groups, which fall into local, remote source, and remote destination mirroring groups. For more information about the mirroring groups, see "Port mirroring classification and implementation." Egress port, and remote probe VLAN The remote probe VLAN, and egress port are used for Layer 2 remote port mirroring. The remote probe VLAN specially transmits mirrored packets to the destination device. Both the reflector port and egress port reside on a source device and send mirrored packets to the remote probe VLAN. The egress port must belong to the remote probe VLAN while the reflector port may not. For more information about the source device, destination device, egress port, and remote probe VLAN, see "Port mirroring classification and implementation." 76

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76
Configuring port mirroring
Introduction to port mirroring
Port mirroring is the process of copying the packets passing through a port to the monitor port connecting
to a monitoring device for packet analysis.
Terminologies of port mirroring
Mirroring source
The mirroring source can be one or more monitored ports. Packets (called "mirrored packets") passing
through them are copied to a port connecting to a monitoring device for packet analysis. Such a port is
called a "source port" and the device where the port resides is called a "source device".
Mirroring destination
The mirroring destination is the destination port (also known as the monitor port) of mirrored packets and
connects to the data monitoring device. The device where the monitor port resides is called the
"destination device." The monitor port forwards mirrored packets to its connected monitoring device.
A monitor port may receive multiple duplicates of a packet in some cases because it can monitor multiple
mirroring sources. For example, assume that Port 1 is monitoring bidirectional traffic on Port 2 and Port
3 on the same device. If a packet travels from Port 2 to Port 3, two duplicates of the packet will be
received on Port 1.
Mirroring direction
The mirroring direction indicates that the inbound, outbound, or bidirectional traffic can be copied on a
mirroring source.
•
Inbound: Copies packets received on a mirroring source.
•
Outbound: Copies packets sent out of a mirroring source.
•
Bidirectional: Copies packets both received and sent on a mirroring source.
Mirroring group
Port mirroring is implemented through mirroring groups, which fall into local, remote source, and remote
destination mirroring groups. For more information about the mirroring groups, see "
Port mirroring
classification and implementation
."
Egress port, and remote probe VLAN
The remote probe VLAN, and egress port are used for Layer 2 remote port mirroring. The remote probe
VLAN specially transmits mirrored packets to the destination device. Both the reflector port and egress
port reside on a source device and send mirrored packets to the remote probe VLAN. The egress port
must belong to the remote probe VLAN while the reflector port may not. For more information about the
source device, destination device, egress port, and remote probe VLAN, see "
Port mirroring classification
and implementation
."