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Cisco SDWAN : C8000v router interface from 1G to 10G

Cisco SDWAN : C8000v router interface from 1G to 10G

As a part of running 10G interfaces on Cisco virtual SDWAN router C8000v in Azure to have more traffic going out from on-prem to Azure applications. 

Cisco SDWAN : C8000v router interface from 1G to 10G
Fig 1.1- Cisco SDWAN : C8000v router interface from 1G to 10G

⭐ Step 1: We upgrade first the backplane throughput of the router with enabling HSECK9 license on Cisco C8000v sdwan router. Here are the two ways you can upgrade the HSEC license on C8000v in Azure 

⭐Related : HSECK9 License for Cisco C8000v SDWAN Router
⭐Related : Cisco SDWAN Workflow : Managing HSEC Licenses C8000V/CSR1000V

 Step 2: Then we came to know that the VM size we used on Azure for C8000v sdwan router is a Standard_DS3_v2 by which we can only use 4 vNIC maximum and total collective bandwidth of 3000MB (3GB). so we need to resize the VM size to that level so that it can support collective bandwidth of 10G and more. Here is the way we resize the C8000v router on Azure

⭐Related : Resizing Cisco Virtual Router C8000v VM in Azure

⭐ Step 3: Now as we upgrade the backplane throughput of the router with enabling HSECK9 license, resize the VM, its time to do the speed change on the interfaces of C8000v router. 

You will see the interfaces on C8000v will be like Gi1, Gi2, Gi3, Gi4. These are only references on the router, you can increase the Gig. interface speed to whatever you need. Lets go with the process now on speed increase in Gig. interfaces

Before we start, Lets check the interface speed on C8000v SDWAN router, Check the red output below

NDNA-C8000v# sh interfaces GigabitEthernet 2
GigabitEthernet2 is up, line protocol is up 
  Hardware is vNIC, address is 2121.acba.2d14 (bia 2121.acba.2d14)
  Description: NDNA-MPLS_to_Azure
  Internet address is 10.12.18.18/28
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 6/255, rxload 100/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full Duplex, 1000Mbps, link type is auto, media type is Virtual
  output flow-control is unsupported, input flow-control is unsupported
  ARP type: ARPA, ARP Timeout 00:20:00
  Last input 00:00:09, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 393799000 bits/sec, 34012 packets/sec
  30 second output rate 25724000 bits/sec, 22293 packets/sec
     23378278734 packets input, 33884676753063 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     9762468651 packets output, 1464433575350 bytes, 0 underruns
     Output 0 broadcasts (0 IP multicasts)
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
NDNA-C8000v#
Lets work on the interface speed now, make sure as need to do no auto negotiation as part of this process. 

⭐ 1. Login to vManage, Navigate to configuration >>> Templates >>> Feature Templates as shown below 

Cisco SDWAN Feature Templates

⭐ 2. Once you inside the Feature template, now add template, on the left search for device "C8000v". Select the device and find " Cli Add-on Template"

Cisco SDWAN Feature template

⭐ 3. Now give template the name and description and put the CLI configuration as shown below for speed and no auto negotiation. Save it

You will see i added two different interfaces here Gi2 and Gi4. One is going towards the Azure Express route (MPLS connection) and other interface is going towards Load Balancer as a part of network. 

We want traffic is coming and going out more than 1 G on these two interfaces.

Cisco SDWAN Feature CLI Add-on Template

⭐ 4.  Now go to the device and check for the device template and search for device template as shown below

Cisco SDWAN Device Template

⭐ 5.  Edit that template "NDNA_C8000v" and scroll to the down to "Additional Templates", You will see there is an option called "CLI Add-on Template" , just click the drop down button and select your feature template : "NDNA_C8000v_10G" and update it. Now the device template with new "CLI Add-on Template" will be pushed to the router. 

Verify the changes on the router as shown below, lets see what it shows on the interface, Check the red output, you will see the changes as 

  • 1000 Mbps to 10000 Mbps
  • link type auto to link type force-up

NDNA-C8000v# sh interfaces GigabitEthernet 2
GigabitEthernet2 is up, line protocol is up 
  Hardware is vNIC, address is 2121.acba.2d14 (bia 2121.acba.2d14)
  Description: NDNA-MPLS_to_Azure
  Internet address is 10.12.18.18/28
  MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full Duplex, 10000Mbps, link type is force-up, media type is Virtual
  output flow-control is unsupported, input flow-control is unsupported
  ARP type: ARPA, ARP Timeout 00:20:00
  Last input 00:00:01, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 183000 bits/sec, 161 packets/sec
  30 second output rate 199000 bits/sec, 166 packets/sec
     953589250 packets input, 41718287716 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     972149766 packets output, 27498633649 bytes, 0 underruns
     Output 0 broadcasts (0 IP multicasts)
     0 output errors, 0 collisions, 4 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
NDNA-C8000v#
You are done with your change, and you will able to have more traffic on the interface now.

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