Enable Accelerated Networking
To enable accelerated networking on a Cisco Catalyst 8000V instance, run the router# show platform software system hypervisor command.
Router#show platform software system hypervisor
Hypervisor: AZURE
Manufacturer: Microsoft Corporation
Product Name: Virtual Machine
Serial Number: 0000-0016-9163-0690-4834-7207-16
UUID: 80cbc2ea-29e6-cc43-93e9-f541876836f2
Image Variant: None
Cloud Metadata
-------------------
Region: eastus
Zone:
Instance ID: eac2cb80-e629-43cc-93e9-f541876836f2
Instance Type: Standard_DS4_v2
Version:
Image ID:
Publisher:
Offer:
SKU:
Interface Info
-------------------
Interface Number : 0
IPv4 Public IP: 192.168.61.135
IPv4 Private IP: 10.0.0.4
IPv4 Subnet Mask: 255.255.0.0
IPv4 Network: 192.168.0.3
IPv4 Gateway: 10.0.0.1
MAC Address: 000D3A103B48
Interface Number : 1
IPv4 Public IP:
IPv4 Private IP: 10.0.1.4
IPv4 Subnet Mask: 255.255.0.0
IPv4 Network: 192.168.1.3
IPv4 Gateway: 10.0.0.1
MAC Address: 000D3A103348
Interface Number : 2
IPv4 Public IP:
IPv4 Private IP: 10.0.4.4
IPv4 Subnet Mask: 255.255.0.0
IPv4 Network: 192.168.2.3
IPv4 Gateway: 10.0.0.1
MAC Address: 00224827BA0F
Interface Number : 3
IPv4 Public IP:
IPv4 Private IP: 10.0.3.4
IPv4 Subnet Mask: 255.255.0.0
IPv4 Network: 192.168.3.3
IPv4 Gateway: 10.0.0.1
MAC Address: 00224827B2A6
Interface Number : 4
IPv4 Public IP:
IPv4 Private IP: 10.0.4.4
IPv4 Subnet Mask: 255.255.0.0
IPv4 Network: 192.168.4.3
IPv4 Gateway: 10.0.0.1
MAC Address: 00224827B5CB Caution |
Due to a Microsoft Azure limitation, enabling accelerated networking on all the interfaces of a Cisco Catalyst 8000V router might cause a significant performance drop if packets greater than 1500 bytes are sent across the Azure infrastructure. The performance degradation occurs because Azure starts fragmenting the packets at 1438 bytes and drops out the sequence packets. This is a known issue and a support case is currently opened with Microsoft. |
To enable accelerated networking, create or modify a vNIC using the az network nic command and the --accelerated-networking option. See the Microsoft Azure documentation for the az network nic command and also refer to the following examples.
 Note |
Depending on how you created the Cisco Catalyst 8000V instance, accelerated networking might initially be disabled on the Cisco Catalyst 8000V NICs. If accelerated networking is disabled on the NIC and you want to enable accelerated networking on an interface, use one of the commands as shown in the following examples. |
Example 1
This example shows how to create a vNIC "mynic1" and enable accelerated networking using the az network nic create command with the --accelerated-networking true option.
az network nic create -n mynic1 -g "RG1" --accelerated-networking true -l "east us" --vnet-name "vnetname" --subnet "subnet1"Example 2
This example shows how to create a vNIC "mynic2" and enable accelerated networking using the az network nic create command with the --accelerated-networking true option option.
az network nic create -n "mynic2" -g "RG1" --accelerated-networking true -l "east us" --vnet-name "vnetname" --subnet "subnet1"Example 3
This example shows how to modify a vNIC "mynic3" to enable accelerated networking using the az network nic update command with the --accelerated-networking true option.
az network nic update -n mynic3 -g rg1 --accelerated-networking true
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