A Cisco 2811 can have modules inserted. Here is a list of some of those modules: NM-1ENW-1E2WNM-1FE-FXNM-1FE-TXNW-1FE2WNM-2E2WNM-2FE2WNM-2WNM-4A/SNM-4ENM-8A/SNM-8AMNM-ESW-161HWIC-1GE-SFPHWIC-2THWIC-4ESWHWIC-8AHWIC-AP-AG-BWIC-1AMWIC-1ENETWIC-1TWIC-2AMWIC-2T I was curious how those modules had effect on the running config concerning the interfaces. So in Packet Tracer, I took a moment to make an inventory of all those modules, with the interfaces section of the running […]

A basic configuration to add users and console/ssh access. Add a username with secret and privilege: 2960a(config)#username philip secret cisco-philip 2960a(config)#username philip privilege 15 Add console access: 2960a(config)#line console 0 2960a(config-line)#password cisco-console 2960a(config-line)#login Add SSH access: 2960a(config)#ip domain-name testenv.lan 2960a(config)#crypto key generate rsa How many bits in the modulus [512]: 2048 2960a(config)#ip ssh version 2 […]

Small example created with Cisco Packet Tracer 7.2. Partial script concerning “access-list”: [Config…] ! hostname LabA ! [Config…] ! interface FastEthernet0/0 description Uplink HomeRouter ip address 10.0.0.2 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/1 description Sales ip address 172.16.40.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 description Finance ip address 172.16.50.1 255.255.255.0 ip […]

When to use a “Straight-Through Cable” and when a “Crossover Cable”, the CCNA way.

In this small example, two Cisco 2811 routers are connected, both on FastEthernet0/0, explaining the use of access-list. The partial config of router0: interface FastEthernet0/0 ip address 10.0.0.1 255.255.255.0 The partial config of router1: interface FastEthernet0/0 ip address 10.0.0.2 255.255.255.0 ! [config…] ! access-list 10 deny host 10.0.0.1 Make note that the command access-list 10 […]

Here an example during studying Chapter 11 VLANs and Inter-VLAN Routing. The lab is made with Cisco Packet Tracer and contains: 1 Cisco 2811 router 3 Cisco 3560 switches 4 laptops 2 VLANs After setting up this config, all laptops can ping each other, in both VLANs. Below some parts of the configs of the […]

Below a configuration of a Cisco 3560 configured as a layer 3 switch. After setting this up, the 4 laptops can ping each other. Below the partial config: [config…] ! ip routing ! [config…] ! vlan 5 name vlan-5 ! vlan 10 name vlan-10 ! vlan 20 name vlan-20 ! vlan 30 name vlan-30 ! […]

Below a configuration with the following devices: Firewall Cisco 2811 router Cisco 2960 switch 3 laptops After setting up this configuration, all laptops can ping each other. Partial config 2811b: ! interface FastEthernet0/0 description Connection to firewall ip address 172.16.0.3 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/1 ip address 192.168.10.1 255.255.255.240 duplex auto speed […]

After adding some VLANs on a Cisco 2811, see https://www.everythingconnected.net/add-vlan-on-cisco-2811/, let’s take a look at the routing table.Perform showing the routing table with: 2811a#show ip route The output will be: Codes: C – connected, S – static, R – RIP, M – mobile, B – BGP D – EIGRP, EX – EIGRP external, O – […]

To add a VLAN on an interface and give it an IP address: 2811a#configure terminal 2811a(config)#interface fastEthernet 0/1.201 2811a(config-subif)#encapsulation dot1Q 201 2811a(config-subif)#ip address 192.168.11.1 255.255.255.0 2811a(config-subif)#end 2811a# After performing above commands, the running-config concerning the interfaces will look like this: ….. interface FastEthernet0/0 description Uplink to Firewall ip address 172.16.0.2 255.255.255.0 duplex auto speed auto […]