QoS Queue0

[whistleblower14]

hi all,

for my understanding the WAN cEdge routers can have 8 hardware queue (queue 0 up to queue 7). In the normal behavior, all of the control-plane traffic is mapped to queue 0 with the scheduling method of LLQ (Low Latency Queueing) and drops method of tail drop... but what happens if VoIP related traffic is also mapped to queue 0 - I mean, how can I be on the safe side so the control- and VoIP traffic don`nt influence each other? what traffic is exactly meant with control traffic and is there a way to know how much bandwidth that traffic will need and use?

[svemulap@cisco.com]

>> what traffic is exactly meant with control traffic and is there a way to know how much bandwidth that traffic will need and use?

Control traffic is the TLS/DTLS traffic between Edge routers and controllers.
Please check:
https://www.cisco.com/c/en/us/td/docs/routers/sdwan/command/sdwan-cr-book/config-cmd.html#wp4894365670

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/system-interface/vedge-20-x/systems-interfaces-book/configure-interfaces.html#c-VPN_Interface_Ethernet_PPPoE-12766 [Table 19]

for additional info.

[svemulap@cisco.com]

You can also get the BW info. from the vManage GUI under Monitor -> Network -> (select) Device -> Interface {pick WAN Interface}

[whistleblower14]

hi and thanks for your response svemulap@cisco.com!

is there also a way = show command or on GUI to see which exact traffic is using Queue0?

[svemulap@cisco.com]

You can verify it with a data-policy with match conditions and when action accept .. set a count
https://www.cisco.com/c/en/us/td/docs/routers/sdwan/command/sdwan-cr-book/config-cmd.html?dtid=osscdc000283#wp1662194301

An example Data-Policy would be:

data-policy TEST
vpn-list vpn100
vpn-list vpn200
sequence 10
match
destination-data-prefix-list Cisco-Voice
!
action accept
count cisco-voice-count <<<<<<------
cflowd
set
forwarding-class Real-Time
!
!
!

Define the QoS class map locally on the box:

class-map
class Real-Time queue 1

qos-scheduler QOS_Map_v1_0
class Queue1
bandwidth-percent 25
buffer-percent 25
!

qos-map QOS_Map_v1
qos-scheduler Shaw_QOS_Map_v1_0


On CLI: show policy data-policy-filter
On vManage GUI: via RealTime option under Monitor -> network -> device

The above example is for Queue1 You can do this for any queue.

HTH