cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
729
Views
0
Helpful
2
Replies

Auto QoS config..

inb
Level 1
Level 1

Hi.
I ask for help following the previous question.
The configuration diagram is as follows.


vlan 10 data -> 2.2.2.0/24
vlan 10 voice -> 1.1.1.0/24


I am trying to apply auto qos.
L3: C3850
L2: C1000
IP Phone: avaya IP Phone

 

I entered the following through the guide docs:
All mls qos are active.

 

// L3 config
After entering int gi0/1 -> "auto qos voip trust", it is created as follows.

interface GigabitEthernet0/1
no switchport
ip address 2.2.2.1 255.255.255.0 secondary
ip address 1.1.1.1 255.255.255.0
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust dscp
auto qos trust

 

// L2 config

After entering int f0/24(UPLINK) -> "auto qos voip trust", it is created as follows.
interface FastEthernet0/24
switchport access vlan 10
switchport mode access
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust cos
auto qos trust
spanning-tree portfast

 

After entering int f0/2 (only PC) -> "auto qos trust dscp", it is created as follows.
interface FastEthernet0/2
switchport mode access
switchport access vlan 10
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust dscp
auto qos trust dscp
spanning-tree portfast

 

After entering int f0/3 (only IP Phone) -> "auto qos trust dscp", it is created as follows.
interface FastEthernet0/3
switchport mode access
switchport voice vlan 10
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust dscp
auto qos trust dscp
spanning-tree portfast

 

According to the guide, you only need to apply the above config.
But when I look at the packet with wireshark, dscp is 0. Does not change.

Do you need to apply more policy-map, class-map, etc.?


I also applied VOICE(1.1.1.0/24) as policy-map(input) through ACL, but confirmed that dscp value does not change.
I'm looking for help.

 

2 Replies 2

gtrejoor
Cisco Employee
Cisco Employee

Hi 

 

Answering the concern, Are you sure that the platforms are correct because C3850 is not using MLS QoS model, secondly the Auto QoS where applied on the C1K device? The incoming port is correct with the auto QoS but the outside interface has the auto qos settings as well? 

Thank you for answer.
Yes. The correct L3 switch model is the 3560-x.
I succeeded in converting the marking value of specific IP band traffic by making separate ACL, policy-map, and class-map instead of auto qos.
For example, telnet Cos6 to ef or some other value.
I would like to know the sample config whether auto qos should be applied and service-policy should be applied by adding ACL, Policy-map, Class-map, etc. as above.
I tried several examples on the Internet, but simply setting "auto qos voip trust" only changes the queue value and does not change the actual traffic marking value.
Also, only input is allowed and output is not supported.

Review Cisco Networking for a $25 gift card