Enterasys C5G124-24 User Manual

Neighbor Discovery Overview
13-6 Configuring Neighbor Discovery
Figure 13-3 Frame Format
Each LLDPDU frame can also contain the following optional TLVs:
• Port Description — The port from which the LLDP agent transmitted the frame.
• System Name — The system’s administratively assigned name.
• System Description — Includes the system’s name, hardware version, OS level, and
networking software version.
• System Capabilities — A bitmap that defines the primary functions of the system. The
currently defined capabilities include, among other things, WLAN access point, router, and
telephone.
• Management Address — The IP or MAC address associated with the local LLDP agent that
may be used to reach higher layer entities.
An LLDPDU frame can also contain the following extension TLVs:
• 802.1 VLAN extension TLVs describe attributes associated with VLANs:
– Port VLAN ID — Allows a bridge port to advertise the port’s VLAN identifier (PVID) that
will be associated with untagged or priority tagged frames it receives.
– Port & Protocol VLAN ID — Allows a bridge to advertise whether it supports protocol
VLANs and, if so, what VLAN IDs these protocols will be associated with.
– VLAN Name — Allows a bridge to advertise the textual name of any VLAN with which it
is configured.
– Protocol Identity — Allows a bridge to advertise the particular protocols that are
accessible through its port.
• 802.3 LAN interface extensions TLVs describe attributes associated with the operation of an
802.3 LAN interface:
– MAC/PHY Configuration/Status — Advertises the bit-rate and duplex capability of the
sending 802.3 node, the current duplex and bit-rating of the sending 802.3 node, and
whether these settings were the result of auto-negotiation during link initiation or manual
override.
– Power-Via-MDI — Advertises the power-via-MDI capabilities of the sending 802.3 node.
– Link-Aggregation — Advertises whether the link is capable of being aggregated, whether
it is currently in an aggregation, and, if it is in an aggregation, the port of the aggregation.
LLDP_Multicast
address
Chassis ID TLV
(M)
Time to Live
TLV (M)
End of LLDPDU
TLV (M)
Port ID TLV (M) Optional TLV ... Optional TLV
MAC
address
88-CC LLDPDU FCS
6 octets
M = Mandatory TLV (required for all LLDPDUs)
DA SA
LLDP
Ethertype
6 octets 2 octets 1500 octets 4 octets
Data + pad
IEEE 802.3 LLDP frame format
LLDPDU format

Enterasys C5G124-24 Specifications

General

Brand	Enterasys
Model	C5G124-24
Category	Switch
Language	English