3.1.2 Flow detection conditions

To perform flow detection, specify the conditions for identifying the flow in the configuration. The following describes the flow detection conditions for the receiving-side interface.

<Structure of this section>

(1) Flow detection condition of the receiving interface

(1) Flow detection condition of the receiving interface

The following table describes the flow detection conditions that can be specified for a receiving interface.

Table 3-2: Flow detection conditions that can be specified for a receiving interface
Type		Configuration items
MAC conditions	Configuration	VLAN ID^#1
	MAC header	Source MAC address
		Destination MAC address
		Ethernet type
		User priority #2
IPv4 conditions	Configuration	VLAN ID^#1
	MAC header	User priority #2
	IPv4 header #3	Upper-layer protocol
		Source IP address
		Destination IP address
		ToS
		DSCP
		Precedence
	IPv4-TCP header	Source port number	Single specification (eq)
		Source port number	Range specification (range) #4
		Destination port number	Single specification (eq)
		Destination port number	Range specification (range) #4
		TCP control flag #5
	IPv4-UDP header	Source port number	Single specification (eq)
		Source port number	Range specification (range) #4
		Destination port number	Single specification (eq)
		Destination port number	Range specification (range) #4
	IPv4-ICMP header	ICMP type value
	IPv4-ICMP header	ICMP code value
IPv6 conditions	Configuration	VLAN ID^#1
	MAC header	User priority #2
	IPv6 header #6	Upper-layer protocol
		Source IP address
		Destination IP address
		Traffic class
		DSCP
	IPv6-TCP header	Source port number	Single specification (eq)
		Source port number	Range specification (range) #4
		Destination port number	Single specification (eq)
		Destination port number	Range specification (range) #4
		TCP control flag #5
	IPv6-UDP header	Source port number	Single specification (eq)
		Source port number	Range specification (range) #4
		Destination port number	Single specification (eq)
		Destination port number	Range specification (range) #4
	IPv6-ICMP header	ICMP type value
	IPv6-ICMP header	ICMP code value

Note #1

VLAN IDs that can be detected by flow detection on the Switch are the values assigned to the VLANs entered in the VLAN configuration. The ID of the VLAN to which received frames belong will be detected.

Note #2

The user priority cannot be detected for the following frames, and therefore user priority 3 is always detected:

- Frames that do not have a VLAN tag

- Frames received on ports on which VLAN tunneling is set

The user priority for a frame that has multiple VLAN tags is detected by counting from the MAC address side.The first VLAN tag encountered will be detected. The following figure shows an example of a frame that has multiple VLAN tags.

[Figure Data]

Note #3

Supplementary note for the ToS field specification

ToS : The value of 3 to 6 bits in the ToS field.

Precedence: The value of the upper 3 bits of the ToS field.

[Figure Data]

DSCP: Value of the six highest-order bits in the ToS field.

[Figure Data]

Note #4

For details about the capacity limits for TCP/UDP port number detection pattern, see the Configuration Guide Vol.1" "3.5 Filtering, QoS, and Policy Based Mirroring.

Note #5

Packets whose ack, fin, psh, rst, syn, or urg flag is set to 1 are detected.

Note #6

Supplementary note for the traffic class field specification

Traffic class: The value of the traffic class field.

[Figure Data]

DSCP: Value of the six highest-order bits in the traffic class field.

[Figure Data]