Configuring Security, Quality, and Network Features
Configuring VLAN Settings for IP Phones
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 149
5
IEEE 802.3 MAC/PHY Configuration/Status TLV
The TLV is not for auto-negotiation, but for troubleshooting purposes. For the
incoming LLDPDU, the TLV is ignored and not validated. For the outgoing LLDPDU,
for the TLV, the octet value auto-negotiation support/status should be:
• Bit 0—Set to 1 to indicate the auto-negotiation support feature is
supported.
• Bit 1—Set to 1 to indicate auto-negotiation status is enabled.
• Bit 2-7—Set to 0.
The bit values for the 2 octets PMD auto-negotiation advertised capability field
should be set to:
• Bit 13—10BASE-T half duplex mode
• Bit 14—10BASE-T full duplex mode
• Bit 11—100BASE-TX half duplex mode
• Bit 10—100BASE-TX full duplex mode
• Bit 15—Unknown
Bit 10, 11, 13 and 14 should be set.
The value for 2 octets operational MAU type should be set to reflect the real
operational MAU type:
• 16—100BASE-TX full duplex
• 15—100BASE-TX half duplex
• 11—10BASE-T full duplex
• 10—10BASE-T half duplex
For example, in most cases, the phone is set to 100BASE-TX full duplex. The value
16 should then be set. The TLV is optional for a wired network and not applicable
for a wireless network. The phone will send out this TLV only when in wired mode.
When the phone is not set for auto-negotiation but specific speed/duplexity, for
the outgoing LLDPDU TLV, bit 1 for the octet value auto-negotiation support/status
should be clear (0) to indicate auto-negotiation is disabled. The 2 octets PMD auto-
negotiation advertised capability field should be set to 0x8000 to indicate
unknown. The Cisco SPA525G/525G2 allows the administrator to set the switch
operational mode to auto-negotiation or to a specific speed/duplexity.
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