24.1.2 Support Specifications

<Structure of this section>

(1) LLDP standard that can be connected

The Switch supports the following two standards:

IEEE Std 802.1AB-2009

The Switch can receive LLDPDU only when the destination MAC is "01:80:C2:00:00:0E".
IEEE 802.1AB Draft 6

By default, it runs in IEEE Std 802.1AB-2009 and sends a IEEE 802.1AB Draft 6's LLDPDU from a port that receives only IEEE 802.1AB Draft 6's LLDPDU. You can also connect a IEEE Std 802.1AB-2005. The following tables show the relationship between the receive LLDPDU and transmit LLDPDU for each standard.

Table 24-1: Relationship between receive LLDPDU and send LLDPDU by standard
Receiving LLDPDU standard		Transmit LLDPDU Specifications
IEEE Std 802.1AB-2009 IEEE Std 802.1AB-2005	IEEE 802.1AB Draft 6	Transmit LLDPDU Specifications
No reception	No reception	IEEE Std 802.1AB-2009^#
No reception	Received	IEEE 802.1AB Draft 6
Received	No reception	IEEE Std 802.1AB-2009^#
Received	Received	IEEE Std 802.1AB-2009^#

#: Only System Capabilities TLV are sent in IEEE Std 802.1AB-2005 standard.

(2) Supported TLV

The following tables show the supported status of TLV on the Switch.

Table 24-2 Supported status of TLV
TLV name		IEEE 802.1AB Draft 6		IEEE Std 802.1AB-2009 IEEE Std 802.1AB-2005		Description
TLV name		Sending	Receiving	Send #1	Receiving	Description
Chassis ID		OK	OK	OK	OK	Send the device MAC addressing.
Port ID		OK	OK	OK	OK	Sends MAC addressof the port.
Time To Live		OK	OK	OK	OK	The holding time of the information sent by the Switch can be changed in the configuration.
Port Description		OK	OK	OK	OK	Sends the same ifDescr as interface grouping MIB.
System Name		OK	OK	OK	OK	Sends the same sysName as system grouping MIB.
System Description		OK	OK	OK	OK	Sends the same sysDescr as system grouping MIB.
System Capabilities		NG	NG	OK	OK	Send information about available and valid features.
Management Address		NG	NG	OK	OK	Send the management address.
Organizationally defined TLV extensions VLAN information VLAN Address info		OK	OK	NG	NG	Transmits IP addresses associated with the set VLAN ID or VLAN.
IEEE802.1 Organizationally Specific TLVs	Port VLAN ID	NG	NG	OK	OK	Sends VLAN ID of the specified port VLAN.
	Port And Protocol VLAN ID	NG	NG	OK	OK	Sends VLAN ID of the set protocol VLAN.
	VLAN Name	NG	NG	#^#2	OK	Sends the name of VLAN and VLAN ID, of the configured port VLAN.

(Legend) OK: Support #: Some support NG: Not supported

Note #1: Sends LLDPDU according to IEEE Std 802.1AB-2009 standard. However, System Capabilities is sent according to IEEE Std 802.1AB-2005 standard.
Note #2: Sends VLAN Name Length info as 0 and does not send VLAN name.

The following subsections describe the above information in detail.

For MIB, refer to "MIB Reference".

(a) Chassis ID (device identifier)

Chassis ID is information that identifies the device. This information has a subtype, and the value to be sent changes according to the subtype. The following table describes subtypes and the values to be sent.

Table 24-3 Subtype list of Chassis ID (IEEE Std 802.1AB-2009)
subtype	Type	Value
1	Chassis component	The same value as entPhysicalAlias of the Entity MIB
2	Interface alias	The same value as ifAlias of the Interface MIB
3	Port component	The same value as Entity MIB's portEntPhysicalAlias, or the same value as backplaneEntPhysicalAlias of Entity MIB
4	MAC address	The same value as macAddress of the LLDP MIB
5	Network address	The same value as networkAddress of the LLDP MIB
6	Interface name	Equal to ifName of interface MIB
7	Locally assigned	The same value as local of the LLDP MIB

Table 24-4 Subtype list of Chassis ID (IEEE 802.1AB Draft 6)
subtype	Type	Value
1	Chassis component	The same value as entPhysicalAlias of the Entity MIB
2	Chassis interface	The same value as ifAlias of the Interface MIB
3	Port	The same value as portEntPhysicalAlias of the Entity MIB
4	Backplane component	The same value as backplaneEntPhysicalAlias of the Entity MIB
5	MAC address	The same value as macAddress of the LLDP MIB
6	Network address	The same value as networkAddress of the LLDP MIB
7	Locally assigned	The same value as local of the LLDP MIB

The following are the sending and reception conditions for Chassis ID:

Send: The only type of subtype to send is MAC address. The value that will be sent is the device MAC address. In the stack configuration, the device MAC of the stack is used.
Reception: Port ID with any subtype can be received.
Maximum length of received data: 255 octets

(b) Port ID (port-identifier)

Port ID is information that identifies the port. This information has a subtype, and the value to be sent changes according to the subtype. The following table describes subtypes and the values to be sent.

Table 24-5: Subtype list of Port ID (IEEE Std 802.1AB-2009)
subtype	Type	Value
1	Interface alias	The same value as ifAlias of the Interface MIB
2	Port component	The same value as Entity MIB's portEntPhysicalAlias, or the same value as backplaneEntPhysicalAlias of Entity MIB
3	MAC address	The same value as macAddr of the LLDP MIB
4	Network address	The same value as networkAddress of the LLDP MIB
5	Interface name	Equal to ifName of interface MIB
6	Agent circuit ID	Circuit ID of RFC3046
7	Locally assigned	The same value as local of the LLDP MIB

Table 24-6 Subtype list of Port ID (IEEE 802.1AB Draft 6)
subtype	Type	Value
1	Port	The same value as ifAlias of the Interface MIB
2	Port component	The same value as portEntPhysicalAlias of the Entity MIB
3	Backplane component	The same value as backplaneEntPhysicalAlias of the Entity MIB
4	MAC address	The same value as macAddr of the LLDP MIB
5	Network address	The same value as networkAddr of the LLDP MIB
6	Locally assigned	The same value as local of the LLDP MIB

The following are the sending and reception conditions for Port ID:

Send: The only type of subtype to send is MAC address. The value that will be sent is the MAC address of the port.
Reception: Port ID with any subtype can be received.
Maximum length of received data: 255 octets

(c) Time-to-Live (hold time of data)

Time-to-Live indicates how long the destination device will retain the distributed information.

Although you can change the retention time in configuration mode, we recommend that you do not change the initial value.

(d) Port description (port type)

Port Description is information that indicates the type of the port. This information does not have a subtype.

The following are the sending and reception conditions for System Description:

Value to be sent: The same value as ifDescr of the Interface MIB
Maximum length of received data: 255 octets

(e) System name (device name)

System Name is information that indicates the name of the device. This information does not have a subtype.

The following are the sending and reception conditions for System Description:

Value to be sent: The same value as sysName of the System MIB
Maximum length of received data: 255 octets

(f) System description (device type)

System Description is information that indicates the type of the device. This information does not have a subtype.

The following are the sending and reception conditions for System Description:

Value to be sent: The same value as sysDescr of the System MIB

When stacking, sysDescr of the master switch is used.
Maximum length of received data: 255 octets

(g) System Capabilities (machine functions)

This information identifies the available functions and the effective functions. The presence or absence of subtype varies depending on the standard.

IEEE Std 802.1AB-2009: Subtype is defined and chassis ID subtype is used for subtype.
IEEE Std 802.1AB-2005: There is no subtype.

The content to be sent and the reception conditions for System Capabilities are as follows.

Sending

Send using IEEE Std 802.1AB-2005 standard. The following tables show the content sent by System Capabilities TLV.

Table 24-7 Content sent by System Capabilities TLV
Data name	Description	Value
system capabilities	Function identifier (function of the device)	MAC Bridge(1) Yes Router(1) Yes
enabled capabilities	Function identifier that is enabled	MAC Bridge(1) Enabled Router(1) Enabled

Receiving

You can receive data using IEEE Std 802.1AB-2009, and IEEE Std 802.1AB-2005 standards. IEEE Std 802.1AB-2009 standard allows you to receive all subtype.

(h) Management Address (Admin)

Identifies the device's IP address or MAC address. This information has a subtype, and the value to be sent changes according to the subtype.

The content to be sent and the reception conditions for Management Address are as follows.

Sending

The following tables show the content sent by Management Address TLV.

Table 24-8 Content sent by Management Address TLV
Data name	Description	Value set
management address subtype	Management address type	1: IP(IPv4) or 2: IP6(IPv6 addressing)
management address	Management address	Use the address set in the configuration command lldp management-address.
interface numbering subtype	Interface number subtype	1:Unknown
OID string length	OID data length	0

Receiving

All subtype can be received. If there is more than one Management Address TLV on LLDPDU, only the last is kept.
Maximum length of received data

167 octets

(i) Organizationally-defined TLV extensions

The Switch supports the following information:

VLAN ID

VLAN ID indicates the VLAN tag used by the port. If the tag translation functionality is used, VLAN ID indicates the VLAN ID after translation. Note that VLAN ID is information that is effective on only trunk ports.
VLAN Address

This information indicates one of IP addresses of VLAN for which IP addresses are set on the applicable port, along with the smallest VLAN ID.

(j) IEEE802.1 Organizationally Specific TLVs

The Switch supports the following information:

Port VLAN ID

Indicates the port VLAN of the port.

For an access port, sends VLAN ID of the corresponding port VLAN. If not an access port, sends a VLAN ID of the native VLAN when the native VLAN is enabled. The maximum receive data length is 6 octets.
Port And Protocol VLAN ID

Indicates the protocol VLAN of the corresponding port.

For a protocol port, sends VLAN ID of the corresponding protocol VLAN. VLAN ID to be sent is up-to-date. If the protocol VLAN is not set, the protocol VLAN data is not sent. The maximum receive data length is 7 octets.
VLAN Name

Indicates the port VLAN of the port.

For an access port, sends VLAN ID of the corresponding port VLAN. For trunked ports, sends VLAN ID of VLAN Tag. When the native VLAN is enabled, VLAN ID of the native VLAN is sent as well. For ports other than access ports and trunk ports, sends VLAN ID for the various ports. When the native VLAN is enabled, VLAN ID of the native VLAN is sent as well.

VLAN ID to be sent is up-to-date. If Tag translation is used, VLAN ID after translation is sent. If VLAN tunneling function is used, VLAN ID of VLAN Tag attached by VLAN tunneling function is sent. The maximum receive data length is 39 octets.