3Com 3824 Implementation Manual

Also see for 3824 - SuperStack 3 Switch: Getting started guide

Contents

12 CHAPTER 1: SWITCH FEATURES O VERVIEWAutomatic IPConfigurationYour Switch can have its IP information automatically configured using aDHCP server. Alternatively, you can manually configure the IPinformation.For more information about how the automatic IP configuration featureworks, see Chapter 9 “Using Automatic IP Configuration”.Port Security Your Switch supports the following port security modes, which you canset for an individual port or a range of ports:■ No SecurityPort security is disabled and all network traffic is forwarded throughthe port without any restrictions.■ SecureAll currently learnt addresses on the port are made permanent. Anypackets containing a source address not learnt on the port will bedropped.The maximum number of permanent addresses on the Switch is 1000.Aggregated Links Aggregated links are connections that allow devices to communicateusing 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 linksshare 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. Whenauto-negotiation is enabled (default), a port “advertises” its maximumcapabilities — these capabilities are by default the parameters thatprovide 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.