Current network scenario - 6509s (VSS with two 6509s at core site connecting to remote sites (wan - L3 routed connections) using 10Gb fiber connections (20Gb port-channels). Remote sites consist of a core stack (3750) connecting to other 3750 stacks with layer 2 20Gb portchannels.
We use QOS in our network but on our 10Gb connections we simply trust the settings and do not impose the service policy like we do on our 1Gb PC/Phone connections as shown below:
PC port setup:
switchport access vlan 210
switchport mode access
switchport voice vlan 510
switchport port-security maximum 3
switchport port-security aging time 3
switchport port-security aging type inactivity
switchport port-security
power inline auto max 15400
srr-queue bandwidth share 10 10 60 20
queue-set 2
priority-queue out
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
service-policy input AutoQoS-Police-CiscoPhone
Sample port of an L3 etherchannel connection over the wan to the 6509 from a 3750X core stack
interface TenGigabitEthernet1/0/1
description connection to OCIS-FR-6509-1
no switchport
no ip address
mls qos trust dscp
channel-group 48 mode active
Sample port of etherchannel between 3750X core stack and layer 2 3750X stack at a remote site
TenGigabitEthernet2/1/1
description conn to CS-F1-3750X-1 TE2/1/1
switchport trunk encapsulation dot1q
switchport mode trunk
mls qos trust cos
channel-group 1 mode active
Finally to questions:
We don't put the service policy on the 10Gb interfaces on the 3750X/E devices since we were told it actually hurts performance and therefore we just trust the QOS settings on the packets. In a few tests we did long ago we did see a performance it on the 10Gb with QOS policy enabled.
NOW TO my main 3850 questions...
We applied layer 2 QOS to our 3850 stacks - example of result on port below:
interface GigabitEthernet4/0/7
switchport access vlan 230
switchport mode access
switchport voice vlan 530
switchport port-security maximum 3
switchport port-security aging time 3
switchport port-security aging type inactivity
switchport port-security
trust device cisco-phone
storm-control broadcast level 0.50
storm-control multicast level 0.50
auto qos voip cisco-phone
spanning-tree portfast
service-policy input AutoQos-4.0-CiscoPhone-Input-Policy
service-policy output AutoQos-4.0-Output-Policy
WHat should we do our our 10Gb and 40Gb Wan (L3) and lan (L2) etherchannel connections between our new stacks? Should we apply the service policy or just trust the COS or DSCP settings on the packets over the high speed connection between the stacks and the 6509 L3 connections?
