Commands
| Vendor |
LSA1 |
LSA2 |
LSA5 |
NAPALM support |
| Cisco |
show ip ospf database router |
show ip ospf database network |
show ip ospf database external |
YES |
| Quagga |
show ip ospf database router |
show ip ospf database network |
show ip ospf database external |
YES |
| Juniper |
show ospf database router extensive | no-more |
show ospf database network extensive | no-more |
show ospf database external extensive | no-more |
YES |
| Bird |
show ospf state all |
show ospf state all |
show ospf state all |
NO |
| Nokia |
show router ospf database type router detail |
show router ospf database type network detail |
show router ospf database type external detail |
NO |
| Mandatory |
YES |
YES |
NO |
Save the output from min two commands (for getting LSA1 and LSA2 ) and upload it to Topolograph with .txt or .log extenstion.
GeneralView
Demo network has already uploaded for everyone. Press `Load dynamic graph` in order to upload it. Once you did it - you can see the topology, bold lines show ECMP links.
Press on bold line in order to unflat ECMP and see all nested links.
The shortest path. How to build.
It's possible to build the shortest path from a node. Just right click on a node. The description with all nodes and path cost is available above the topology.
Once you set the source and destination - you get colored the shortest path.
All the shortest paths to all nodes. Minimum Shortest Tree.
New feature of v2.11 release. MST allows see all the shortest paths To or From node. Just activate it from this radio-checkbox.
New feature of v2.11 release. All incoming the shortest paths are built to the node.
New feature of v2.11 release. All outgoing the shortest paths are built from the node.
New feature of v2.13 release. Difference between incoming and outgoing the shortest paths of selected node.
Network's termination device search
How is it possible to know what networks are terminated on some particular node. Thera are two ways how to know about it. The first one - start typing Node ID in Focus/From field and you will see all terminated networks on the node.
The second method is just to press on a node. New form pops up with a list of all backuped and non-backuped networks. The network is trated as backuped if such network is terminated on min two nodes.
Backup paths. Link outage emulation.
In order to find out the backup path - just press on edge. You will simulate link outage and the shortest path will be rebuilt passing by a 'failed" edge.
Change OSPF edge cost on the fly
It's possible to change OSPF cost of any link. Right click on edge, new form pops up. Write new ospf cost in input field. Imagine if we need to redirect a traffic flow from 123.10.10.10 - 123.30.30.30 link to another link.
Right click on colored edge and set 12. We get new traffic flow with new OSPF cost.
Compare state of your network in different time
When you perform some configuration changes (add new network, redistribute another protocol to OSPF or change filters in existed route-maps) it is highly desire to make sure that results of you action give you expected changes in OSPF network. In order to do this - upload your network before your changes and right after it and compare them. What will be shown:
- New/old nodes
- New/old networks
- Links with new/old ospf cost
NetworkReactionOnFailure
In this mode it's possible to simulate a link or router shutdown/outage. The topology will be re-pained with expected changed traffic flow avoiding failed link or router.
Network reaction if a link/s goes down. Simulate link down.
Upload a graph if did't do it before and press on NetworkReactionOnFailure.
- Blue lines show traffic increasing over the link
- Grey lines show traffic decreasing over the link
As you can see decreasing rate of traffic from 123.30.30.30 node to 123.123.30.30 and 123.123.31.31 differ from opposite direction [ from 123.123.30.30 to 123.30.30.30 ] upto ~2times. It happens because of the unsymmetric traffic path.
We also can see an expected increasing rate of blue painted edge.
Network reaction if a network device/s goes down. Simulate device down.
Right click on a node and choose `shutdown this node`. The algorithm escape this node.
Analytics
In this mode it's possible to run algorithms in order to check your OSPF network.
Unidirectional and unsymmetric links.
Print out any Unidirectional links ( number of IN and OUT links between two neighbors is not equal)
The edge is marked as red edge because of cost 1 and cost 10 OSPF metric
Unsymmetric paths.
Print out any unsymmetric paths from different points of views.
We get a list of nodes which have unsymmetric paths. Just checking them - we can see difference in incoming and Outgoing paths.
