Cisco Router labs

Started by certforumz, January 30, 2016, 06:56:54 PM

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certforumz

Configuring BGP protocol on a cisco router:

Here is an overview of how to configure Border Gateway Protocol (BGP) on a Cisco router:

Enable BGP on the router by using the "router bgp [AS number]" command.

Configure the router's BGP Identifier by using the "bgp router-id [IP address]" command.

Establish a BGP neighbor relationship with another router by using the "neighbor [IP address] remote-as [AS number]" command.

Configure the BGP network by using the "network [network prefix] mask [mask]" command.

Configure optional attributes, such as the weight, local preference, and AS-path, to influence the BGP path selection process by using the "neighbor [IP address] attribute-map [name]" command.

Verify the BGP configuration and status using the "show ip bgp summary" command.

Monitor and troubleshoot the BGP sessions using the "debug ip bgp" command.

Please note that the above steps are a general overview of how to configure BGP on a Cisco router, the specific command syntax and configure may vary depending on the IOS version and the specific requirements of your network.

Also, when configuring BGP it's important to have a good understanding of the routing policies, the topology of the network, the number of routes and the routing scalability requirements.

https://routersimulator.certexams.com/router-labs/bgp-configuration1.html

Check out CCNA Netsim from certexams.com





Pamelarig

Je crois que cest mon Cisco qui perd la "connection"...
Si je debranche mon RJ45 du Cisco quand je suis en trouble et que je le plante dans le 2Wires ca fonctionne...

Cest comme si le Cisco perdait le lien qui avait avec le 2wires de Bell.
ca arrive frequemment quand jessaie dacceder de lexterieur, a mes camera IP sur mon reseaux, ou quand je me branche sur le serveur VPN a la job..
Quand mon internet plante et que je retourne voir les settings du 2Wires de Bell, mon coupe feu, se replace tout seul en mode protection maximal au lieu de DMZPlus comme je lavais mis

P-e que mon Cisco est en trouble...

Mais je met aussi en doute mes talents dinformaticien...  12 en arriere du clavier   

Je comprend p-e mal la technique , du coupe feu entre le 2Wire de Bell et mon router Cisco.
comment laisser une "porte" ouverte au Cisco via le 2Wire pour que je puisses acceder a mon reseaux de lexterieur , le mode DMZ cest bien ?

Je vais continuer mes recherches...

Merci de vos "hints"

certforumz


To configure route redistribution between EIGRP and OSPF on a Cisco router:

First, enable the appropriate routing protocols on the router by using the "router eigrp" and "router ospf" commands.

Next, configure the redistribution of routes by using the "redistribute [protocol]" command. For example, to redistribute EIGRP routes into OSPF, you would use the command "router ospf 1 redistribute eigrp [AS number] metric [metric value]".

Additionally, you can configure filters to control which routes are redistributed by using the "route-map" command. For example, you can use a route-map to only redistribute routes that meet certain criteria, such as a specific prefix or metric.

Finally, it is important to monitor the network and make sure that the redistribution is working as expected. You can use the "show ip route" command to view the routes that have been redistributed, and use the "debug" command to troubleshoot any issues.

Please note that the above steps are a general overview of how to configure route redistribution between EIGRP and OSPF, the specific command syntax and configure may vary depending on the IOS version and the specific requirements of your network.

To configure route redistribution from OSPF to EIGRP on a Cisco router, you would use the following steps:

Enable the appropriate routing protocols on the router by using the "router eigrp [AS number]" and "router ospf [process ID]" commands.

Configure the redistribution of routes by using the "redistribute [protocol]" command. For example, to redistribute OSPF routes into EIGRP, you would use the command "router eigrp [AS number] redistribute ospf [process ID] metric [metric value] [subnets]"

Additionally, you can configure filters to control which routes are redistributed by using the "route-map" command. For example, you can use a route-map to only redistribute routes that meet certain criteria, such as a specific prefix or metric.

Finally, it is important to monitor the network and make sure that the redistribution is working as expected. You can use the "show ip route" command to view the routes that have been redistributed, and use the "debug" command to troubleshoot any issues.

Please note that the above steps are a general overview of how to configure route redistribution from OSPF to EIGRP, the specific command syntax and configure may vary depending on the IOS version and the specific requirements of your network.

https://routersimulator.certexams.com/router-labs/index.html


certforumz

Bringing up an ios router interface"
To bring up an interface on a Cisco IOS router, you can use the following command in global configuration mode:

interface interface-name
Replace "interface-name" with the name of the interface you want to bring up. For example, to bring up interface GigabitEthernet0/1, you would use the following command:

interface GigabitEthernet0/1Once you are in interface configuration mode, you can use the "no shutdown" command to bring up the interface:

no shutdownThis will enable the interface and allow it to start passing traffic. You can then configure any additional settings for the interface, such as IP address and subnet mask, using the appropriate commands in interface configuration mode.

Verify that the router interface is up:
To verify that a router interface is up and running, you can use the following commands in Cisco IOS:

Use the "show interfaces" command to display information about all interfaces on the router, including their status, IP address, and other information.

show interfacesThis will display information about all interfaces, including their status (up or down), bandwidth, and protocol status.

Use the "show ip interface brief" command to display a brief summary of all interfaces on the router, including their IP addresses and status.

https://routersimulator.certexams.com/router-labs/bringing-up-a-router-interface.html

certforumz

  • DNS stands for Domain Name System, and it is a distributed naming system that translates human-readable domain names into IP addresses that are used to identify and locate devices on the internet.
  • The DNS system is hierarchical in nature, with the root DNS servers at the top of the hierarchy, followed by top-level domain (TLD) servers, authoritative name servers, and finally, the DNS resolvers that are used by end users.
  • DNS works by using a process called DNS resolution, which begins when a user enters a domain name into their web browser. The browser then sends a request to the DNS resolver, which in turn sends a request to the DNS recursive resolver. The recursive resolver then queries the authoritative name servers to determine the IP address associated with the requested domain name.
  • DNS is essential to the proper functioning of the internet, as it enables users to easily access websites and other online resources using human-readable domain names rather than numerical IP addresses.
  • DNS is also used for other purposes, such as email delivery, where it is used to locate the mail servers associated with a particular domain name, and for DNS-based authentication of named entities (DANE), where it is used to verify the authenticity of SSL/TLS certificates.
  • DNS can be vulnerable to various types of attacks, such as DNS cache poisoning, which can allow an attacker to redirect users to a malicious website, and DNS amplification attacks, which can be used to launch large-scale DDoS attacks.
  • DNSSEC (Domain Name System Security Extensions) is a set of security protocols that can be used to protect against many types of DNS attacks by enabling the digital signing of DNS records, thus preventing tampering and forgery.
  • DNS is constantly evolving, with new features and enhancements being added to improve its functionality, security, and performance. One example of this is the introduction of DNS over HTTPS (DoH), which provides additional privacy and security by encrypting DNS queries and responses.


What does DNS stand for?
a. Digital Naming System
b. Domain Naming System
c. Data Networking System
d. Domain Network Security
Answer: b. Domain Naming System

What is the purpose of DNS?
a. To translate IP addresses into domain names
b. To encrypt online communication
c. To enable users to easily access websites using domain names
d. To protect against cyber attacks
Answer: c. To enable users to easily access websites using domain names

How does DNS resolution work?
a. The browser sends a request to the DNS recursive resolver, which queries the root DNS servers
b. The browser sends a request to the DNS resolver, which queries the authoritative name servers
c. The browser sends a request directly to the web server hosting the website
d. The browser sends a request to the TLD servers, which query the DNS recursive resolver
Answer: b. The browser sends a request to the DNS resolver, which queries the authoritative name servers

What is DNSSEC?
a. A set of security protocols that enables the digital signing of DNS records
b. A protocol that encrypts DNS queries and responses
c. A type of DDoS attack
d. A tool used to redirect users to a malicious website
Answer: a. A set of security protocols that enables the digital signing of DNS records

What is DNS over HTTPS (DoH)?
a. A security protocol used to protect against DNS attacks
b. A protocol that encrypts DNS queries and responses
c. A type of cyber attack
d. A tool used to redirect users to a malicious website
Answer: b. A protocol that encrypts DNS queries and responses

https://www.examguides.com/

certforumz

To configure Routing Information Protocol version 2 (RIPv2) on a router, follow these general steps:

Enter configuration mode: Enter global configuration mode by typing configure terminal.

Enable RIP routing: Enter the command router rip to enable RIPv2 routing.

Configure network interfaces: Use the command network followed by the network address and wildcard mask to specify the interfaces to be included in the RIPv2 process. For example, to include the interface with IP address 192.168.1.1 and subnet mask 255.255.255.0, use the command network 192.168.1.0.

Set RIPv2 parameters: Use the command version 2 to specify that the router should use RIPv2 rather than the older RIPv1 protocol. Other optional parameters include passive-interface
to exclude an interface from the RIPv2 process, and default-information originate to advertise a default route.

Save configuration: After configuring RIPv2, save the configuration changes to non-volatile memory using the write memory command.

Example configuration for RIPv2:

configure terminal
router rip
version 2
network 192.168.1.0
network 10.1.1.0
passive-interface Ethernet0/0
default-information originate
exit
write memory

This configuration enables RIPv2 routing on the router, includes the networks 192.168.1.0/24 and 10.1.1.0/24 in the RIPv2 process, excludes the Ethernet0/0 interface from RIPv2 updates, advertises a default route, and saves the configuration to non-volatile memory. Note that the specific commands and parameters may vary depending on the router model and operating system version. Check more labs.

https://routersimulator.certexams.com/router-labs/index.html