What command is used to display the routing protocols used or the routing table in the exec priviledge mode?

The show ip protocols command is used when a dynamic routing protocol is being run on the device. The output from this command can be used to verify that the routing protocol configuration is being processed as expected. The exact output from this command depends on the dynamic routing protocol that is configured.

Table of Contents Show

Which command displays our IP routing table?
What is the routing algorithm used by IGRP?
What is command for RIP?
Which is true dynamic routing?
How to use EIGRP for route summarization?
When to use the EIGRP command in AAA?
Which is the default administrative distance for EIGRP?
Basic Cisco Router Show Commands

Which command displays our IP routing table?

Which command displays RIP routing updates? Explanation: The debug IP rip command is used to show the Internet Protocol (IP) Routing Information Protocol (RIP) updates being sent and received on the router.

What command is used to display the routing protocols used or the routing table in the exec privilege mode?

show ip route command
To display the current state of the routing table, use the show ip route command in user EXEC or privileged EXEC mode.

What is the routing algorithm used by IGRP?

IGRP uses protocol number 9 for communication. IGRP is considered a classful routing protocol.

What is command for RIP?

The no shutdown (RIP) command in router-RIP configuration mode will enable RIP. This command enables RIP on the switch. Issuing this command enables RIP, but to send and receive RIP route updates and to route packets via RIP you must also specify interfaces on which RIP will run by using the network (RIP) command.

How do you show a routing protocol?

show ip route –command will give you the output of running protocol and routes on cisco routers, you can identify the which routing protocol is running on routers by its codes. Codes: C – connected, S – static.

How do I find my IP routing?

Use the Netstat ROUTE/-r command to display routes to the network. Verify whether TCP/IP has a route to the destination. For information about the Netstat ROUTE/-r command, see z/OS Communications Server: IP System Administrator’s Commands.

How do I find my ip routing?

What are IGRP protocols?

Interior Gateway Routing Protocol (IGRP) is a proprietary distance vector routing protocol used to communicate routing information within a host network. It was invented by Cisco. IGRP manages the flow of routing information within connected routers in the host network or autonomous system.

Which is true dynamic routing?

Which is true regarding dynamic routing? Dynamic routes are automatically added to the routing table. Dynamic routing scales well in large networks and routes are automatically added into the routing table. Static routing is done by hand, one route at a time into each router.

How to use EIGRP for route summarization?

Route summarization reduces the amount of routing information in the routing tables. Use the auto-summary command to allow the software to create summary subprefixes to the classful network boundary when crossing classful network boundaries. EIGRP summary routes are given an administrative distance value of 5. You cannot configure this value.

How to check the retransmit interval in EIGRP?

The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information? Below is an example of the “show ip eigrp neighbors” output.

When to use the EIGRP command in AAA?

If the user group assignment is preventing you from using a command, contact your AAA administrator for assistance. EIGRP uses up to 50 percent of the bandwidth of a link, as defined by the bandwidth interface configuration command. This command may be used if some other fraction of the bandwidth is desired.

Which is the default administrative distance for EIGRP?

The number [ 90/2172416] in the EIGRP routes above shows the default administrative distance of EIGRP which is 90 and the metric value. Other “Show IP Route” command options show ip route [ip address] : shows only information about the specified IP address.

This tutorial explains basic show commands (such as show ip route, show ip interfaces brief, show version, show flash, show running-config, show startup-config, show controllers, etc.) in Cisco router with examples. Learn how to use show commands in Cisco router to get specific information.

To explain basic router show commands, I will use packet tracer network simulator software. You can use any network simulator software or can use a real Cisco router to follow this guide. There is no difference in output as long as your selected software contains the commands explained in this tutorial.

Create a practice lab as shown in following figure or download this pre-created practice lab and load in packet tracer

Download practice topology for basic show commands

If require, you can download the latest as well as earlier version of Packet Tracer from here. Download Packet Tracer

In this practice lab

Device / Interface	Connected To	IP Address
PC0	Router0's FastEthernet 0/0	10.0.0.2/255.0.0.0
Router0's FastEthernet 0/0	PC0	10.0.0.1/255.0.0.0
Router0's Serial 0/0/0	Router1's serial 0/0/0	50.0.0.1/255.0.0.0
Router1's Serial 0/0/0	Router0's serial 0/0/0	50.0.0.2/255.0.0.0
Router1's FastEthernet 0/0	PC1	20.0.0.1/255.0.0.0
PC1 Router1's	FastEthernet 0/0	20.0.0.2/255.0.0.0

RIP Routing protocol is configured on both routers.
Clock rate and bandwidth is assigned on Router0’s serial interface 0/0/0.

Above practice lab is only a recommendation to understand the show commands more clearly, it’s not a requirement to follow this tutorial. You can follow this tutorial in a single router or even without router.

Basic Cisco Router Show Commands

Access CLI prompt of router

Use enable command to enter in privilege exec mode. Cisco IOS supports unique context sensitive help features. We can use this features to list all available commands and parameters those are associated with show command.

Enter show command with ? ( Question mark ) to list all available commands

If prompt returns with parameters excluding <CR> that means it requires more parameters to complete this command.

If prompt returns with <CR> only as option, that means router does not need any additional parameters to complete this command. You can execute this command in current condition.

Router#show interfaces

This command shows the status and configuration of interfaces. By default it will display all interfaces. But you can limit it to particular interface. To view the detail of specific interface you can use the following command.

Router#show interface [type slot_# port_#]

For example to view the detail of serial 0/0/0 interface on Router0 we will use following command

Output of this command provides several details about interface including its status, encapsulation, interface type, MTU, last input and output packet etc. First line of output shows the status of interface. First up indicates the status of physical layer. Second up refers the data link layer status.

Possible status of physical layer

UP: - Interface is receiving physical layer signals.
Down:- Interface is not receiving physical layer signals. This could be happen due to following reasons.
- Cable is unplugged
- You are using wrong cable type.
- Attached device is turned off.
Administratively down:- Interface is turned off by using shutdown command.

Possible status of data link layer

UP:- interface is operational.
Down:- interface is not operational. This could be due to following reasons:-
- Physical layer is down
- Incorrect encapsulation setting
- Incorrect clock rate or bandwidth setting
- Incorrect keepalives setting

Interface status	Description
UP and UP	Interface is operational
UP and Down	Check data link layer for possible reasons given above
Down and Down	Check physical layer for possible reasons given above
Administratively down and down	Interface is disabled with shutdown command

Second line shows the Hardware type and MAC address of interface.
Third line shows the IP address of interface.
MTU indicates the Ethernet frame size.
BW parameter refers to bandwidth link

Router# show ip interface brief

This command provides a quick overview of all interfaces on the router including their IP addresses and status.

Router#show controllers [type slot_# port_#]

This command is used to check the hardware statistic of interface including clock rate and cable status such as cable is attached or not. One end of serial cable is physically DTE, and other end is DCE. If cable is attached, it will display the type of cable.

Router#show flash

This command will display the content of flash memory, used space and available space. By default router stores IOS image file in flash. We can use this command to check the available space in Flash memory while updating / restoring IOS files.

Router#show version

This command will display information about software version of running IOS. It also provides information about configuration setting. It shows current configuration register setting that is used to reset the password of router.

Router#show startup-config

Routers load configuration from NVRAM in startup. This command will display the configuration stored in NVRAM.

Router#show running-config

Router keeps all running configuration in RAM. This command will display the configuration currently running in RAM.

Router#show clock

This command displays current time on router.

Router#show hosts

This command displays names and addresses of the hosts on the network that you can connect.

Router#show users

This command displays users currently connected to the router.

Router#show arp

This command displays ARP cache table. ARP table is used to resolve the hardware MAC addresses.

Router#show protocols

This command shows the status of configured layer three protocols on the device.

Router#show history

Router keeps a history of used command. This command will list the used command on that level.

Router#show ip route

Routers use routing table to take packet forward decision. This command displays routing table.

Show command supports several other parameters to display command specific information. Due to length of this article we will include them in next articles with their respective topics.