LimitationsMode/Driver
•
MTU change: (Intel limitation) First change the VF MTU
on the host PF using the ip link set command. Then change
the corresponding interface MTU on the VM. Otherwise,
no traffic will pass. (Intel limitation)
•
MAC address change: After changing the MAC address, it
is necessary to change the MAC address of the VF on the
host PF using the ip link set command. Otherwise, no traffic
will pass. (Intel limitation.)
•
Maximum VLANs: The maximum number of VLANs
supported on PF is 64. Together, all VFs can have a total
of 64 VLANs. (Intel limitation.)
•
Maximum Multicast filtering: Intel VF supports registering
a maximum of 30 multicast addresses. (Intel limitation.)
•
Layer2 Learning: Intel SRIOV VF does not support
promiscuous mode, so Layer 2 functionality, such as EVC,
does not work. (Intel limitation.)
SR-IOV (ixgbevf)
•
VLAN is not supported in high-performance mode.
VM-FEX ESXi DirectPath IO (VMXNET3)
Cisco CSR 1000v and Hypervisor Limitations
This section describes performance limitations due to how the Cisco CSR 1000v integrates with supported
hypervisors.
Cisco CSR 1000v and Hypervisor Limitations for Cisco IOS XE Denali 16.3.1 and Later
In these releases, the Cisco CSR 1000v does not support the hot removal of interfaces and does not have the
ability to modify vNIC MTU.
Cisco CSR 1000v and Hypervisor Limitations for Cisco IOS XE Denali 16.2
Cisco IOS XE Denali 16.3.1 and later is recommended instead of Cisco IOS XE Denali 16.2.Note
Cisco CSR 1000v and Hypervisor Limitations for Cisco IOS XE Release 3.12S
•
When the Cisco CSR 1000v is installed on Microsoft Hyper-V, the interface numbers can change after
Microsoft Hyper-V fails over to a new server, or restarts after a live migration.
â—¦
If the server is set to perform ungraceful failover, there is no workaround.
Cisco CSR 1000v Series Cloud Services Router Software Configuration Guide
24
Cisco CSR 1000v Series Cloud Services Router Overview
Hypervisor Support
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