We have a very nice 24 port Cisco Catalyst 2900 XL switch donated by . It runs Cisco IOS Version 12.0(5.1)XP [c2900XL-h2s-mz-120.5.1-XP.bin]. Cisco have a configuration guide and command reference online.

It runs a telnet server on the admin VLAN at 192.168.1.4 and is connected to racnoss. Here's a dump of the switchport config:

Current configuration:
!
version 12.0
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Switch
!
enable password 7 #####################
!
!
!
!
!
!
no spanning-tree vlan 1
ip subnet-zero
no ip domain-lookup
!
!
!
interface FastEthernet0/1
 description router (ace)
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1-6,1002-1005
 switchport mode trunk
!
interface FastEthernet0/2
 description piper
 switchport access vlan 3
 spanning-tree portfast
!
interface FastEthernet0/3
 description none
 switchport access vlan 3
 spanning-tree portfast
!
interface FastEthernet0/4
 description wotan
 switchport access vlan 3
 spanning-tree portfast
!
interface FastEthernet0/5
 description oracle
 switchport access vlan 3
 spanning-tree portfast
!
interface FastEthernet0/6
 description mantis
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/7
 description none
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/8
 description none
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/9
 description one
 switchport access vlan 4
 spanning-tree portfast
!         
interface FastEthernet0/10
 description delphon
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/11
 description orgi
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/12
 description none
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/13
 description skaro
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/14
 description none
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/15
 description mara
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/16
 description adric
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/17
 description cluster-sun
 switchport access vlan 4
 spanning-tree portfast
!         
interface FastEthernet0/18
 description cluster-mercury
 switchport access vlan 4
 spanning-tree portfast
!         
interface FastEthernet0/19
 description cluster-venus
 switchport access vlan 4
 spanning-tree portfast
!         interface FastEthernet0/20
 description cluster-earth
 switchport access vlan 4
 spanning-tree portfast
!         
interface FastEthernet0/21
 description spiderport
 spanning-tree portfast
!         
interface FastEthernet0/22
 description trogdor
 switchport access vlan 5
 spanning-tree portfast
!         
interface FastEthernet0/23
 description none
 switchport access vlan 3
 spanning-tree portfast
!         
interface FastEthernet0/24
 description none
 switchport trunk encapsulation dot1q
 switchport mode trunk
!         
interface FastEthernet1/1
!         
interface FastEthernet1/2
!         
interface VLAN1
 ip address 192.168.1.4 255.255.255.0
 no ip directed-broadcast
 no ip route-cache
!         
!         
line con 0
 transport input none
 stopbits 1
line vty 0 4
 password 7 ##################
 login    
line vty 5 9
 password 7 ##################
 login    
!         
end

To configure another port connect to the switch via telnet or via racnoss and do something like:

 Switch>en
 Password:
 Switch#conf t
 Enter configuration commands, one per line.  End with CNTL/Z.
 Switch(config)#int fa0/16
 Switch(config-if)#description HOSTNAME
 Switch(config-if)#switchport access vlan 3
 Switch(config-if)#spanning-tree portfast
 Switch(config-if)#exit
 Switch(config)#exit
 Switch#

Use

write memory

to save your changes to the flash memory once you are happy with the new configuration.

The old_3com_switch is also kicking around.