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Layer 3 Features
Address Resolution Protocol (ARP)
The Address Resolution Protocol (ARP) converts IP addresses into physical addresses, and maps
the IP address to a MAC address. ARP allows a host to communicate with other hosts only when
the IP address of its neighbors is known.
For more information, see "Configuring ARP."
TCP
Transport Control Protocol (TCP). TCP connections are defined between 2 ports by an initial
synchronization exchange. TCP ports are identified by an IP address and a 16-bit port number.
Octets streams are divided into TCP packets, each carrying a sequence number.
BootP and DHCP Clients
DHCP enables additional setup parameters to be received from a network server upon system
startup. DHCP service is an on-going process. DHCP is an extension to BootP.
For more information on DHCP, see "Defining DHCP IP Interface Parameters."
Quality of Service Features
Class Of Service 802.1p Support
The IEEE 802.1p signaling technique is an OSI Layer 2 standard for marking and prioritizing
network traffic at the data link/MAC sub-layer. 802.1p traffic is classified and sent to the
destination. No bandwidth reservations or limits are established or enforced. 802.1p is a spin-off of
the 802.1Q (VLANs) standard. 802.1p establishes eight levels of priority, similar to the IP
Precedence IP Header bit-field.
For more information, see "Configuring Quality of Service."
Ethernet Switch Module Management Features
SNMP Alarms and Trap Logs
The system logs events with severity codes and timestamps. Events are sent as SNMP traps to a
Trap Recipient List.
For more information on SNMP Alarms and Traps, see "Defining SNMP Parameters."
SNMP Version 1 and Version 2
Simple Network Management Protocol (SNMP) over the UDP/IP protocol controls access to the
system, a list of community entries is defined, each of which consists of a community string and its
access privileges. There are 3 levels of SNMP security read-only, read-write and super. Only a super
user can access the community table.
15
Introduction
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