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Chapter 2
Connecting the Switch Block
Table 2.3 shows the different duplex options available on the 1900/2800
and 2900XL switches.
Use the show interface command to view the duplex configuration:
Todd1900EN#sh int f0/26
FastEthernet 0/26 is Suspended-no-linkbeat
Hardware is Built-in 100Base-TX
Address is 0030.80CC.7D1A
MTU 1500 bytes, BW 100000 Kbits
802.1d STP State: Blocking Forward Transitions: 0
Port monitoring: Disabled
Unknown unicast flooding: Enabled
Unregistered multicast flooding: Enabled
Description: trunk_to_Building_4
Duplex setting: Full duplex
Back pressure: Disabled
Verifying IP Connectivity
It is important to test the switch IP configuration. You can, of course, use the
Ping program, as well as Telnet. The 5000 series also allows you to use the
traceroute command.
T A B L E 2 . 3
Duplex Options
Parameter
Definition
Auto
Sets the port to auto-negotiation mode,
which is the default for all 100BaseTX ports
Full
Forces the 10 or 100Mbps ports into full-
duplex mode.
Full-flow-control
Works only with 100BaseTX ports; uses flow
control so buffers won't overflow
Half
Default for 10BaseT ports, forces the ports to
work only in half-duplex mode
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