Release Notes

Cisco NX-OS Release 11.0(3k) Release Notes for Cisco Nexus 9000 Series ACI-Mode Switches
Caveats
9
Bug ID
Description
CSCuq92447
When modifying the L2Unknown Unicast parameter on a Bridge Domain (BD), interfaces on externally
connected devices may bounce. Additionally, the endpoint cache for the BD is flushed and all endpoints
will have to be re-learned.
CSCuq93389
If an endpoint has multiple IPs, the endpoint will not be aged until all IPs go silent. If one of the IPs is
reassigned to another server/host, fabric detects it as an IP move and forwarding will work as expected.
CSCur01336
PSU not getting detected after OIR with Power input connected.
CSCur14844
iping picks a source address from a different subnet for a directly connected destination.
CSCur76586
Port-channel remains in the admin-down state after being enabled.
CSCur81822
The access-port operational status is trunk.
CSCur84296
When removing the secondary IP on an external SVI interface, static routes defined in the VRF or context
of the SVI are removed causing traffic to be looped in the fabric.
CSCus59893
ARP does not reach hosts in the same endpoint group.
■ The Cisco Nexus 9508 ACI-mode switch supports warm (stateless) standby where the state is not synched
between the active and the standby supervisor modules. For an online insertion and removal (OIR) or reload of
the active supervisor module, the standby supervisor module becomes active, but all modules in the switch are
reset because the switchover is stateless. In the output of the show system redundancy status command,
warm standby indicates stateless mode.
■ When a recommissioned APIC controller rejoins the cluster, GUI and CLI commands can time out while the
cluster expands to include the recommissioned APIC controller.
■ If connectivity to the APIC cluster is lost while a switch is being decommissioned, the decommissioned switch
may not complete a clean reboot. In this case, the fabric administrator should manually complete a clean reboot
of the decommissioned switch.
■ Before expanding the APIC cluster with a recommissioned controller, remove any decommissioned switches
from the fabric by powering down and disconnecting them. Doing so will ensure that the recommissioned APIC
controller will not attempt to discover and recommission the switch.
IGMP Snooping Known Behaviors:
■ Multicast router functionality is not supported when IGMP queries are received with VxLAN encapsulation.
■ IGMP Querier election across multiple Endpoint Groups (EPGs) or Layer 2 outsides (External Bridged Network) in
a given Bridge Domain (BD) is not supported. Only one EPG or Layer 2 outside for a given BD should be
extended to multiple multicast routers if any.
■ The rate of the number of IGMP reports sent to a leaf switch should be limited to 1000 reports per second.
■ Unknown IP multicast packets are flooded on ingress leaf switches and border leaf switches,
maximum of 50 BDs per leaf.