3Com 3824 Implementation Guide - Page 12

Automatic IP Configuration, Port Security, Aggregated Links, Auto-negotiation, - manual

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12 CHAPTER 1: SWITCH FEATURES OVERVIEW Automatic IP Your Switch can have its IP information automatically configured using a Configuration DHCP server. Alternatively, you can manually configure the IP information. For more information about how the automatic IP configuration feature works, see Chapter 9 "Using Automatic IP Configuration". Port Security Your Switch supports the following port security modes, which you can set for an individual port or a range of ports: ■ No Security Port security is disabled and all network traffic is forwarded through the port without any restrictions. ■ Secure All currently learnt addresses on the port are made permanent. Any packets containing a source address not learnt on the port will be dropped. The maximum number of permanent addresses on the Switch is 1000. Aggregated Links Aggregated links are connections that allow devices to communicate using up to eight links in parallel. Aggregated links provide two benefits: ■ They can potentially increase the bandwidth of a connection. ■ They can provide redundancy - if one link is broken, the other links share the traffic for that link. For more information about aggregated links, see Chapter 2 "Optimizing Bandwidth". Auto-negotiation Auto-negotiation allows ports to auto-negotiate port speed, duplex-mode (only at 10 Mbps and 100 Mbps) and flow control. When auto-negotiation is enabled (default), a port "advertises" its maximum capabilities - these capabilities are by default the parameters that provide the highest performance supported by the port. SFP ports do not support auto-negotiation of port speed. Ports operating at 1000 Mbps only support full duplex mode.

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12
C
HAPTER
1: S
WITCH
F
EATURES
O
VERVIEW
Automatic IP
Configuration
Your Switch can have its IP information automatically configured using a
DHCP server. Alternatively, you can manually configure the IP
information.
For more information about how the automatic IP configuration feature
works, see
Chapter 9
“Using Automatic IP Configuration”
.
Port Security
Your Switch supports the following port security modes, which you can
set for an individual port or a range of ports:
■
No Security
Port security is disabled and all network traffic is forwarded through
the port without any restrictions.
■
Secure
All currently learnt addresses on the port are made permanent. Any
packets containing a source address not learnt on the port will be
dropped.
The maximum number of permanent addresses on the Switch is 1000.
Aggregated Links
Aggregated links are connections that allow devices to communicate
using up to eight links in parallel. Aggregated links provide two benefits:
■
They can potentially increase the bandwidth of a connection.
■
They can provide redundancy — if one link is broken, the other links
share the traffic for that link.
For more information about aggregated links, see
Chapter 2
“
Optimizing Bandwidth
”
.
Auto-negotiation
Auto-negotiation allows ports to auto-negotiate port speed,
duplex-mode (only at 10 Mbps and 100 Mbps) and flow control. When
auto-negotiation is enabled (default), a port “advertises” its maximum
capabilities — these capabilities are by default the parameters that
provide the highest performance supported by the port.
SFP ports do not support auto-negotiation of port speed.
Ports operating at 1000 Mbps only support full duplex mode.