154
■ Both the CDP and LLDP support “system capabilities,” but the CDP capabilities cover
capabilities that are not part of LLDP. These capabilities are shown as “others” in the LLDP
neighbors table.
If all ports have CDP awareness disabled, the switch forwards CDP frames received from
neighbor devices. If at least one port has CDP awareness enabled, all CDP frames are
terminated by the switch.
When CDP awareness for a port is disabled, the CDP information is not removed
immediately, but will be removed when the hold time is exceeded.
Optional TLVs
–
Configures the information included in the TLV field of advertised messages.
◆
Port Descr
– The port description is taken from the ifDescr object in RFC 2863, which
includes information about the manufacturer, the product name, and the version of the
interface hardware/software.
◆
Sys Name
– The system name is taken from the sysName object in RFC 3418, which
contains the system's administratively assigned name. To configure the system name, see
page 34.
◆
Sys Descr
– The system description is taken from the sysDescr object in RFC 3418, which
includes the full name and version identification of the system's hardware type, software
operating system, and networking software.
◆
Sys Capa
– The system capabilities identifies the primary function(s) of the system and
whether or not these primary functions are enabled. The information advertised by this TLV
is described in IEEE 802.1AB.
◆
Mgmt Addr
– The management address protocol packet includes the IPv4 address of the
switch. If no management address is available, the address should be the MAC address for
the CPU or for the port sending this advertisement.
The management address TLV may also include information about the specific interface
associated with this address, and an object identifier indicating the type of hardware
component or protocol entity associated with this address. The interface number and OID are
included to assist SNMP applications in the performance of network discovery by indicating
enterprise specific or other starting points for the search, such as the Interface or Entity MIB.
Since there are typically a number of different addresses associated with a Layer 3 device,
an individual LLDP PDU may contain more than one management address TLV.
WEB INTERFACE
To configure LLDP timing and advertised TLVs:
1. Click Configuration, LLDP.
2. Modify any of the timing parameters as required.
3. Set the required mode for transmitting or receiving LLDP messages.
4. Enable or disable decoding CDP frames.
Содержание GEP-1070
Страница 80: ...80 authentication from any point within the network...
Страница 168: ...168...