Hi,
To request more power from a cisco switch (POE+ or UPOE),
the LLDP protocol is required.
I am developing this protocol for a new board.
My LLDPPDU consists of chassis-id, port-id, port-description,system-name,
system-description, UPOE LLDP TLV
Here is what the switch console output shows when it receives a LLDP frame
*Jul 23 22:16:24.693: LLDP advertisement packet RX'd on intf GigabitEthernet1/0/
3
*Jul 23 22:16:24.693: LLDP rx state on GigabitEthernet1/0/3 set to RX FRAME
*Jul 23 22:16:24.693: LLDP unknown tlv type 127 recd - ignoring it
*Jul 23 22:16:24.693: LLDP malformed optional TLV 127 found - ignored
*Jul 23 22:16:24.693: LLDP unknown tlv type 127 recd - ignoring it
*Jul 23 22:16:24.693: LLDP malformed optional TLV 127 found - ignored
*Jul 23 22:16:24.693: LLDP rx state on GigabitEthernet1/0/3 set to WAIT FOR FRAM
E
Switch#show lldp entry *
Capability codes:
(R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device
(W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other
------------------------------------------------
Chassis id: b043.5df0.f0f8
Port id: NLC-010-32
Port Description: Port description
System Name: System name
System Description:
System description
Time remaining: 112 seconds
System Capabilities: O
Enabled Capabilities: O
Management Addresses:
Other: 42 30 2D 34 33 2D 35 44 2D 46 30 2D 46 30 2D 46 38 00
Auto Negotiation - not supported
Physical media capabilities - not advertised
Media Attachment Unit type - not advertised
Vlan ID: - not advertised
Total entries displayed: 1
Switch#
*Jul 23 22:16:24.693: LLDP advertisement packet RX'd on intf GigabitEthernet1/0/
3
*Jul 23 22:16:24.693: LLDP rx state on GigabitEthernet1/0/3 set to RX FRAME
*Jul 23 22:16:24.693: LLDP unknown tlv type 127 recd - ignoring it
*Jul 23 22:16:24.693: LLDP malformed optional TLV 127 found - ignored
*Jul 23 22:16:24.693: LLDP unknown tlv type 127 recd - ignoring it
*Jul 23 22:16:24.693: LLDP malformed optional TLV 127 found - ignored
*Jul 23 22:16:24.693: LLDP rx state on GigabitEthernet1/0/3 set to WAIT FOR FRAM
E
and the command
Switch#show lldp entry *
Capability codes:
(R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device
(W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other
------------------------------------------------
Chassis id: b043.5df0.f0f8
Port id: NLC-010-32
Port Description: Port description
System Name: System name
System Description:
System description
Time remaining: 112 seconds
System Capabilities: O
Enabled Capabilities: O
Management Addresses:
Other: 42 30 2D 34 33 2D 35 44 2D 46 30 2D 46 30 2D 46 38 00
Auto Negotiation - not supported
Physical media capabilities - not advertised
Media Attachment Unit type - not advertised
Vlan ID: - not advertised
Total entries displayed: 1
Switch#
//high power via MDI (Cisco)
#define LLDP_HPWR_MDI_TYPE 127 //7bits
#define LLDP_HPWR_MDI_LEN 12 //TLV information string
#define LLDP_HPWR_MDI_SUBTYPE 2 //8bits, 802.3
#define LLDP_HPWR_MDI_SUPPORT 0x0C //8bits, MDI power support (selection,enabled,supported,PD)
#define LLDP_HPWR_MDI_PSEPAIR 0x03 //8bits, PSE power pair (power via 1-2/3-6 and/or 4-5/7-8)
#define LLDP_HPWR_MDI_CLASS 4 //8bits, power class (to request high power)
#define LLDP_HPWR_MDI_PRIO 100 //8bits, source priority (100 = highest priority ??)
#define LLDP_HPWR_MDI_REQUEST 30 //16bits, PD power request, want to request 60W (must wait for switch advertisement?)
#define LLDP_HPWR_MDI_GRANT 0 //16bits, PSE power granted (field set by switch)
char LLDP_HPWR_MDI_OUI[] = {0xb0,0x43,0x5d};
//UPOE power via MDI (Cisco)
//A new LLDP TLV, 4-wire Power-via-MDI TLV, is introduced for UPOE. This TLV is present in the LLDP
//packet in all modes of operation, that is, 802.3af, 802.3at, and beyond. The PD can use this TLV to
//advertise its 4-pair related capabilities and requirements to the PSE; the PSE can power the PD
//accordingly.
#define LLDP_UPOE_MDI_TYPE 127 //7bits
#define LLDP_UPOE_MDI_LEN 5 //TLV information string
#define LLDP_UPOE_MDI_SUBTYPE 1 //8bits, Cisco OUI subtype
#define LLDP_UPOE_MDI_CAP 0x05 //8bits, PSE spare pair operational, PD spare pair enabled,
// no spare pair detection, 4pair support
char LLDP_UPOE_MDI_OUI[] = {0x00,0x01,0x42};
The only 2 TLV's with type 127 are
// UPOE LLDP TLV
printf("Add UPOE LLDP TLV\n");
if (!(
START_LLDP_TLV(LLDP_UPOE_MDI_TYPE) &&
PUSH_UINT8(LLDP_UPOE_MDI_LEN) &&
PUSH_BYTES(LLDP_UPOE_MDI_OUI, OUI_LEN) &&
PUSH_UINT8(LLDP_UPOE_MDI_SUBTYPE) &&
PUSH_UINT8(LLDP_UPOE_MDI_CAP)
))
return 0;
END_LLDP_TLV;
// IEEE 802.3 Organizationally Specific TLV set
// mdi power
printf("Add MDI power\n");
if (!(
START_LLDP_TLV(LLDP_HPWR_MDI_TYPE) &&
PUSH_UINT8(LLDP_HPWR_MDI_LEN) &&
PUSH_BYTES(LLDP_HPWR_MDI_OUI, OUI_LEN) &&
PUSH_UINT8(LLDP_HPWR_MDI_SUBTYPE) &&
PUSH_UINT8(LLDP_HPWR_MDI_SUPPORT) &&
PUSH_UINT8(LLDP_HPWR_MDI_PSEPAIR) &&
PUSH_UINT8(LLDP_HPWR_MDI_CLASS) &&
PUSH_UINT8(LLDP_HPWR_MDI_PRIO) &&
PUSH_UINT16(LLDP_HPWR_MDI_REQUEST) &&
PUSH_UINT16(LLDP_HPWR_MDI_GRANT)
))
return 0;
END_LLDP_TLV;
and they both are malformed apparently.
I assume the above two routines are easy to understand:
they push bytes into a buffer that makes up the LLDPPDU data.
I don't see the malformat. What am I missing?
regards peter
