Appendix B

1
Appendix B

• Configuring the Catalyst 1900 Switch

2
Objectives

• Configure the Catalyst 1900 Switch CLI
• Configure the Catalyst 1900 Switch Hostname and
  Passwords
• Configure the Catalyst 1900 Switch Security
• Configure Virtual LANs
• Configure ISL Routing

3
Features of the 1900 Switch

• Two Models
• 1912
• 12 10BaseT Ethernet ports
• AUI port on back port 25
• 1 or 2 FastEthernet Uplinks ports 26 27
• 1924
• 24 Ethernet ports
• 1 or 2 FastEthernet Uplinks ports 26 27
• Types of Operating Systems
• IOS-based
• Set-based CLI older switches
• The Three Configuration Options
• Command Line Interface (CLI)
• Visual Switch Manager (VSM) Web Based
• Switch must have IP set
• Original Menu System
• Menu-based options

4
Catalyst 1924 Switch
RPS (redundant power supply)
System
Mode
Stat --- shows status of PortsFdup shows which
ports are Full DuplexUtl -- ports 1 4 1.5
mbps 5 8 1.5 20 mbps
9 12 20 120 mbps
5
Cisco 1900 IOS Configuration Commands

• Set the passwords
• enable password level 1 15 password
• 1 usermode
• 15 privileged mode
• Password 4 8 characters
• Not case sensitive
• Can not be recovered
• enable secret will override can be the same as
  enable
• Set the hostname
• hostname hostname
• Configure the IP address and subnet mask
• Telnet can not telnet from
• VLANs
• ip address ip-address subnet-mask
• ip default-gateway ip-address

6
IOS Commands (cont)

• Identify the interfaces
• slot/port format
• int ethernet 0/ lt1 25gt
• Set a description on the interfaces
• description descriptive_entry
• No spaces
• Define the duplex of a port
• duplex auto full full-flow-control half
• auto default for 100BaseT
• half default for 10BaseT
• Full-flow-control works only with 100BaseT

7
IOS Commands (cont.)

• Verify Settings
• sh int
• sh ip
• Verify connectivity
• ping
• telnet in but not out

8
IOS Commands (cont.)

• Erasing the Switch Configuration
• delete nvram
• Managing the MAC Address Table
• 1024 max entries
• Setting Permanent MAC Address Entries
• Never age out no other address can attach to
  port unless defined
• Setting Static MAC Address Entries
• restricted restricts where source can send
  frames
• sh mac-address-table
• clear mac-address-table dynamic permanent
  restricted
• mac-address-table aging-time permanent
  restricted mac-address interface
• mac-address-table restricted static
  dest-mac-address dest-port source-port

9
IOS Commands (cont.)

• Configuring Port Security
• Stop users from plugging in hub
• port secure max-mac-count 1 132
• Sticky-learn mac table entries permanent
• Using the Show Version command
• Basic switch information
• sh port system
• Will show switching mode in use
• Changing the LAN Switch Type
• switching-mode fragment-free store-and-forward

10
VLANS

• Break up broadcast domains
• The 1900 switches support up to 64
• A separate spanning tree instance for each VLAN -
  default
• You can enable and disable STP on a per-VLAN or a
  global basis.

11
Configuring VLANs

• Example
• gten
• config t
• Enter configuration commands, one per line. End
  with
• CNTL/Z
• (config)hostname 1900EN
• 1900EN(config)vlan 2 name sales
• 1900En(config)vlan 3 name marketing
• 1900En(config)vlan 4 name mis
• 1900EN(config)exit

12
Configuring VLANs

• Assigning Switch Ports to VLANs
• (config-if)vlan-membership 1 1005 static
  dynamic
• sh vlan
• sh vlan
• sh vlan-membership
• Configuring Trunk Ports
• (config-if)trunk state
• auto will become trunked only if connected to
  on or desirable
• desirable will negotiate to become trunked
• nonnegotiate becomes a permanent trunk port
• off disabled from trunking
• on becomes a permanent ISL trunk port

13
Configuring VLANs (cont)

• Clearing VLANs from Trunk Ports
• no trunk-vlan
• Verifying Trunk Ports
• sh trunk A B optional-parameter
• allowed-vlans
• joined-vlans
• joining-vlans
• prune-eligible
• Configuring ISL Routing
• Enable ISL routing on the router subinterface the
  switch connects to
• Enable ISL encapsulation on router sub-interfaces
• Encapsulation isl vlan
• Assign IP addresses to sub-interfaces

14
Configuring VTP

• Configuring the Domain
• Vtp
• client
• domain
• password
• pruning
• server
• transparent
• trap
• vtp domain name
• sh vtp
• Adding to a VTP Domain
• Best to delete vtp database and start over
• delete vtp
• VTP Pruning
• Set on at server it will be on for domain
• Prevents send vtp broadcasts over trunk when VLAN
  not present on the uplink side

15
Restoring or Upgrading the Catalyst 1900 IOS

• Upgrading
• copy tftp//tftp_host_address/IOS_filename
  opcode
• Backing Up and Restoring the Catalyst 1900
  Configurationcopy nvram tftp//tftp_host_address
  /config-namecopy tftp//tftp_host_address/config
  -name nvram

16
CDP with the 1900 Switch

• Works with all cisco devices
• Commands
• sh cdp
• cdp timer
• cdp holdtime

17
Enjoy and rest up