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OSPF Path Selection

Chiranjit Dey
Level 1
Level 1

There are 2 paths to destination in an OSPF network. Both paths have equal total path cost. So by default OSPF takes both paths to its routing table. "maximum-paths 1" command is given after that and as its effects only one path is now in the routing table from 2 paths having equal total path costs.
Now which path is taken for the routing table between 2 paths and why?

3 Replies 3

Philip D'Ath
VIP Alumni
VIP Alumni

I don't know the answer - but I expect the last route received (aka the most recent update) to be installed into the routers forwarding table.

Joseph W. Doherty
Hall of Fame
Hall of Fame

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Posting

From my experience, it appears it's implementation specific (and best avoided [i.e. don't count on observed behavior]).

1001QA.Net
Level 1
Level 1

MTU can be used as a tie breaker

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