3Com 3C17300A-US Implementation Guide - Page 16

Automatic IP Configuration, Security, Aggregated Links - pdf

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16 CHAPTER 1: SWITCH FEATURES OVERVIEW For a list of the features supported by your Switch, please refer to the Management Quick Reference Guide supplied in PDF format on the CD-ROM that accompanies your Switch. Automatic IP Configuration By default the Switch tries to configure itself with IP information without requesting user intervention. It uses the following industry standard methods to allocate the Switch IP information: ■ Dynamic Host Configuration Protocol (DHCP) ■ Auto-IP - the Switch will configure itself with its default IP address 169.254.100.100 if it is operating in standalone mode, and/or no other Switches on the network have this IP address. If this default IP address is already in use on the network then the Switch detects this and configures itself with an IP address in the range 169.254.1.0 to 169.254.254.255. ■ Bootstrap Protocol (BOOTP) For ease of use, you do not have to choose between these three automatic configuration methods. The Switch tries each method in a specified order. For more information about how the automatic IP configuration feature works, see Chapter 9 "Using Automatic IP Configuration". Security Your Switch has the following security features, which guard against unauthorized users connecting devices to your network: ■ Network Login - controls user access at the network edge by blocking or unblocking access on a per-port basis. ■ Rada (Radius Authenticated Device Access) - uses a device MAC address for authentication against a RADIUS server. ■ Disconnect Unauthorized Device (DUD) - disables a port if an unauthorized device transmits data on it. For more information about how the port security features work, see Chapter 10 "Making Your Network Secure". Aggregated Links Aggregated links are connections that allow devices to communicate using up to four links in parallel. On the Switch 4200 Family, aggregated links are supported on the 10/100/1000 Mbps ports and the GBIC or SFP ports. Aggregated links provide two benefits:

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16
C
HAPTER
1: S
WITCH
F
EATURES
O
VERVIEW
For a list of the features supported by your Switch, please refer to the
Management Quick Reference Guide supplied in PDF format on the
CD-ROM that accompanies your Switch.
Automatic IP
Configuration
By default the Switch tries to configure itself with IP information without
requesting user intervention. It uses the following industry standard
methods to allocate the Switch IP information:
■
Dynamic Host Configuration Protocol (DHCP)
■
Auto-IP — the Switch will configure itself with its default IP address
169.254.100.100 if it is operating in standalone mode, and/or no
other Switches on the network have this IP address. If this default IP
address is already in use on the network then the Switch detects this
and configures itself with an IP address in the range 169.254.1.0 to
169.254.254.255.
■
Bootstrap Protocol (BOOTP)
For ease of use, you do not have to choose between these three
automatic configuration methods. The Switch tries each method in a
specified order.
For more information about how the automatic IP configuration feature
works, see
Chapter 9
“Using Automatic IP Configuration”
.
Security
Your Switch has the following security features, which guard against
unauthorized users connecting devices to your network:
■
Network Login — controls user access at the network edge by
blocking or unblocking access on a per-port basis.
■
Rada (Radius Authenticated Device Access) — uses a device MAC
address for authentication against a RADIUS server.
■
Disconnect Unauthorized Device (DUD) — disables a port if an
unauthorized device transmits data on it.
For more information about how the port security features work, see
Chapter 10
“Making Your Network Secure”
.
Aggregated Links
Aggregated links are connections that allow devices to communicate
using up to four links in parallel. On the Switch 4200 Family, aggregated
links are supported on the 10/100/1000 Mbps ports and the GBIC or SFP
ports. Aggregated links provide two benefits: