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Cisco Bug: CSCtd94383 - MDT tree failed to be initiated after ISSU.

Last Modified

May 10, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

4.0.1.BASE

Description (partial)

Symptom:
After ISSU triggered sucessfully, we found the mdt interface in mvpn failed to be created. Then all mvpn services broken after ISSU.

Conditions:
On the SRP, PIM does a backend_scan when it starts up but it doesn't learn any multicast configs in that call. Instead it seems to be receiving the SysDB callbacks much later. We set a Boolean in PIM when we return from the backend scan call. Since that Boolean gets set w/o learning any MVPN config, PIM ignores the MDT interface create notifications from IM for all vrfs. Vrf 2 works fine since it was reconfigured later.
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