Symptom
After disruptive upgrade from nxos 9.3(5) to nxos 9.3(8) the layer 3 vni svi on a leaf/Border Leaf/Border Gateway may stay down indicating "VLAN/BD is down" leading to connectivity issues.
Conditions
Perform disruptive upgrade from nxos 9.3(5) to nxos 9.3(8) on a leaf/border leaf/border gateway.
Issue may also be seen after a regular reload when running nxos 9.3(8).
Workaround
Shut/No-shut the L3 VNID SVI
Note that a reload might not fix it as next reload might also result in L3VNID SVI to remain in down/down
Further Problem Description
After disruptive upgrade from nxos 9.3(5) to nxos 9.3(8) the layer 3 vni svi on border gateway may stay down indicating "VLAN/BD is down" leading to connectivity issues.
Issue may also be seen after reload when running nxos 9.3(8).
DC1-BGW1# show interface | i i vlan
Vlan2000 is down (VLAN/BD is down), line protocol is down, autostate enabled
Note that the issue may not happen all the time. This is triggered due to a timing issue while the system is attempting to bring up the SVI.
