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How to Find Bridge Nodes

Identify nodes that are critical for connectivity - their removal would disconnect parts of the network.

Quick Answer​

grph centrality graph.gexf --type betweenness --top 10

Nodes with high betweenness centrality are bridge nodes.

Understanding Bridge Nodes​

A bridge node lies on many shortest paths between other nodes. If removed:

  • Communication between parts of the network is disrupted
  • Average path length increases
  • Some nodes may become unreachable

Examples​

Find Network Bottlenecks​

grph centrality network.gexf --type betweenness --top 5

These are your single points of failure.

Find Social Connectors​

grph centrality social.gexf --type betweenness --top 5

These people connect different communities.

Find Critical Transit Points​

grph centrality underground.gexf --type betweenness --top 5

Stations that connect different parts of the network.

Verifying Bridge Status​

Check what happens if a suspected bridge is "removed":

# Extract the network without the bridge node
grph subgraph graph.gexf node1 node2 node3 ...  # exclude the bridge

# Check if still connected
grph stats subset.gexf  # Look at "Connected" status