Bug 1965 - restrictive assert in ECMP code
restrictive assert in ECMP code
Product: ns-3
Classification: Unclassified
Component: global-routing
PC Linux
: P5 enhancement
Assigned To: Tom Henderson
Depends on:
  Show dependency treegraph
Reported: 2014-08-26 14:09 EDT by Tom Henderson
Modified: 2014-08-26 14:12 EDT (History)
1 user (show)

See Also:


Note You need to log in before you can comment on or make changes to this bug.
Description Tom Henderson 2014-08-26 14:09:54 EDT
Tommaso found that in the ipv4 global routing test suite, replacing the link n0->n2 with anything other than point-to-point causes this assert to fire:

SPFVertex::GetRootExitDirection () const

  NS_ASSERT_MSG (m_ecmpRootExits.size () <= 1, "Assumed there is at most one exit from the root to this vertex");
  return GetRootExitDirection (0);

This was added with the bug 667 ECMP patch many years ago.  The assert may be too restrictive.

I'm filing this as a reminder to myself to investigate and fix.