Essential Guide To Displaying Routing Tables: Command And Usage

Politicalnews 19 Jul 2024

What is the command to show routing table?

The command to show routing table is a command used to display the routing table of a network device. The routing table contains information about the network paths to different destinations, including the next hop IP address and the interface to use to reach each destination. This information is used by the device to determine how to forward packets to their destination.

The command to show routing table is typically used by network administrators to troubleshoot network connectivity issues. It can also be used to verify that the routing table is configured correctly.

Here is an example of the output of the command to show routing table on a Cisco router:

Codes: L - local, C - connected, S - static, R - RIP, O - OSPF, IA - IS-IS, B - BGP D - EIGRP, EX - EIGRP external, a - per-prefix advertisement, + - candidate default U - per-prefix advertisement via nontrivial route, s - summary, i1 - internal link metric i2 - external link metric, io - IGP external link metric, su - summary aggregate su(A) - summary aggregate advertise via, su(C) - summary aggregate compare via PKS - permanent static route *> - candidate default UCMP route --> - selected UCMP route ! - suppressed due to no advertisement % - Implicit null route # - Invalidate subnet for redistribution or propagation | - aggregate route N - NSSA external type 1 or 2 e - EIGRP metric eligible, E - EIGRP metric ineligible r - redistributed route f - flagged route g - gateway of last resort route x - policy route d - dampened route D - dimensioned BGP route > - Greater-than tagged route < - Less-than tagged route D - Default route I - Injected route m - multicast route p - passive interface route s - sender-based route S - SID-based route u - user-configured route c - connected route l - local route a - aggregate route A - aggregate route due to redistribution h - host route H - host route due to redistribution G - group route G - group route due to redistribution b - BFD route learned via an active BFD session B - BFD route learned via a passive BFD session C - connected route due to Cisco Discovery Protocol Y - Nexthop learned via protocol routing Y - Nexthop resolution failed Y - Nexthop un-resolveable, administrative distance set to highest Y - Nexthop resolution timed out Y - Nexthop learned via static arp Y - Nexthop learned via connected arp X - Nexthop learned via unknown resolution method > 10.1.1.0/30 is directly connected, Loopback0 > 10.1.2.0/24 is directly connected, Ethernet0/0 > 10.15.0.0/24 is directly connected, Ethernet0/1 > 0.0.0.0/0 10.1.2.2 200 100 100 G 0 0 0 0 > 10.15.0.2 200 100 100 G 0 0 0 0

The command to show routing table is a valuable tool for network administrators. It can be used to troubleshoot network connectivity issues, verify that the routing table is configured correctly, and monitor the overall health of the network.

FAQs on "command to show routing table"

This section provides answers to frequently asked questions about the command to show routing table.

Question 1: What is the purpose of the command to show routing table?

The command to show routing table is used to display the routing table of a network device. The routing table contains information about the network paths to different destinations, including the next hop IP address and the interface to use to reach each destination. This information is used by the device to determine how to forward packets to their destination.

Question 2: How can I use the command to show routing table to troubleshoot network connectivity issues?

The command to show routing table can be used to troubleshoot network connectivity issues by verifying that the routing table is configured correctly. If the routing table does not contain an entry for the destination network, then the device will not be able to forward packets to that network.

Summary of key takeaways:

The command to show routing table is a valuable tool for network administrators.
The command to show routing table can be used to troubleshoot network connectivity issues, verify that the routing table is configured correctly, and monitor the overall health of the network.