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NM-16ESW Replaces Switches In Dynamips Switching Labs

Posted by: admin  :  Category: GNS3 Dynamips, Switching




I am sure that everyone has discovered that the switches in Dynamips and GNS3 do not have the capability of supporting complex switching labs, but all is not lost. High level switching can be accomplished by using a Cisco 3640 running c3640-jk9s-mz.124-16.bin IOS with an NM-16ESW installed in slot 1 as the high level switches.

The Cisco NM-16ESW is a 16 port high density voice network module that provides layer 2 switching. It can be installed in the 2600, 3600 and 3700 series routers, and supports 10/100 on each of it 16 ports.

This configuration can emulate most of the high level switch functions need to complete the CCNA, CCNP and most of the CCIE lab scenarios. The following a list of labs you can and cannot practice.

Labs that can be completed:

  • STP
  • PVST
  • VLANS
  • VTP
  • SVI
  • Etherchannel, both Layer2 and Layer3
  • Intervlan Routing using Router on Stick or SVI.
  • Private VLANs


Lab that cannot be completed:

  • RSTP,MST (Rapid spanningTree and Multiple spanning Tree)
  • VLAN ACLS, DHCP Snooping
  • Dynamic Etherchannelling using PaGP and LACP
  • Dynamic Trunk Negotiation using DTP
  • Port Security, Sticky Secure Mac Addresses.
  • Dot1x based Authentication

The following are examples of how to configure some of these topologies using the Cisco 3640 and NM-16ESW. SVI for layer 3 processing:

  • Router>ena
  • Router#config t
  • Router(config)#hostname SW1
  • SW1(config)#int vlan 1
  • SW1(config-if)#ip address 172.16.1.141 255.255.0.0
  • SW1(config-if)#no shut
  • SW1(config-if)#exit
  • SW1(config)#exit
  • SW1# copy run start

VLANS:

  • Router>ena
  • Router#config t
  • Router(config)#hostname SW1
  • SW1(config)#int vlan 1
  • SW1(config-if)#ip address 172.16.1.141 255.255.0.0
  • SW1(config-if)#no shut
  • SW1(config-if)#exit
  • SW1(config)#exit
  • SW1#vlan database
  • SW1#(vlan)#Vlan 141 name Vlan-141
  • SW1#(vlan)#Vlan 141 name Vlan-41
  • SW1#(vlan)#Vlan 141 name Vlan-43
  • SW1#(vlan)#exit
  • SW1# copy run start

VTP:

  • Router>ena
  • Router#config t
  • Router(config)#hostname SW1
  • SW1(config)#int vlan 1
  • SW1(config-if)#ip address 172.16.1.141 255.255.0.0
  • SW1(config-if)#no shut
  • SW1(config-if)#exit
  • SW1(config)#exit
  • SW1#vlan database
  • SW1#(vlan)#VTP domain SW-LAB
  • SW1#(vlan)#exit
  • SW1#config t
  • SW1(config)#int fa 0/15
  • SW1(config-if)#switchport mode trunk
  • SW1(config-if)#switchport trunk encap dot1q
  • SW1(config)#int fa 0/14
  • SW1(config-if)#switchport mode trunk
  • SW1(config-if)#switchport trunk encap dot1q
  • SW1(config-if)#exit
  • SW1(config)#exit
  • SW1# copy run start


ETHERCHANNEL:

  • Router>ena
  • Router#config t
  • Router(config)#hostname SW1
  • SW1(config)#int vlan 1
  • SW1(config-if)#ip address 172.16.1.141 255.255.0.0
  • SW1(config-if)#no shut
  • SW1(config-if)#int fa 0/10
  • SW1(config-if)#channel group 1
  • SW1(config-if)#int fa 0/11
  • SW1(config-if)#channel group 1
  • SW1(config-if)#int fa 0/12
  • SW1(config-if)#channel group 1
  • SW1(config-if)#int fa 0/13
  • SW1(config-if)#channel group 1
  • SW1(config-if)#exit
  • SW1(config)#exit
  • SW1# copy run start

STP:

  • Router>ena
  • Router#config t
  • Router(config)#hostname SW1
  • SW1(config)#int vlan 1
  • SW1(config-if)#ip address 172.16.1.141 255.255.0.0
  • SW1(config-if)#no shut
  • SW1(config-f)#exit
  • SW1(config)#spanning-tree vlan 41
  • SW1(config)#exit
  • SW1# copy run start

This is just some of the more popular command as you know there are many more but this give you an idea of how to configure the NM-16ESW for practicing switch lab scenarios. For more information about the Cisco NM-16ESW see the Cisco NM-16ESW documentation.

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