I have a 50 Mbps optical link between 2 remote locations, this optical link is leased to a local telco company. One location is using a Cisco 4503 and port GE 2/15 is connected to the telco switch providing the optical fiber. The other location is using a Cisco 3750 where port 1/0/5 is connected to the telco switch providing the optical fiber.
The network is flat between the remote locations, the same subnet. I am trying to apply some sort of QoS on this link.
I would like to guaranteed 1 Mbps for VOIP, 40 Mpbs for APPLICATION1, 6 Mbps for APLICATION2 and 3 Mbps for default traffic.
I would like this QoS to be shared, not shaped. You will find bellow what I plan to configure on both switches (4503 and 3750), if someone could review it and give me some advices I would really appreciate. Thanks.
Step1: Activating QoS
Step 2: Match traffic
access-list 20 remark APPLICATION2
access-list 20 permit ip host 10.166.11.111
access-list 20 permit ip host 10.166.0.100
access-list 21 remark APPLICATION1
access-list 21 permit ip host 10.164.8.147
access-list 21 permit ip host 10.164.8.149
access-list 21 permit ip host 10.164.8.148
Step3: Classify traffic
class-map match-any APPLICATION1
description APPLICATION1 TRAFFIC CLASS
match access-group 21
class-map match-any APPLICATION2
description APPLICATION2 TRAFFIC CLASS
match access-group 20
class-map match-any VOIP
description VOIP TRAFFIC CLASS
match ip dscp ef
Step4: Mark traffic
policy map Assign.DSCP
set dscp ef
set dscp 34
set dscp 26
Default traffic will be assigned DSCP 0
Step5: Apply policy to all switch ports
service-policy input Assign.DSCP
Step6: Mapping DSCP with egress queues
Will use the default mapping. Verify it with show mls qos maps dscp-output-q
DSCP 46 (VOIP) go to queue 1, guaranteed 2% of 50 Mbps.
DSCP 0 (DEFAULT) go to queue 2, guaranteed 6% of 50 Mbps.
DSCP 26 (APPLICATION1) go to queue 3, guaranteed 80% of 50 Mbps.
DSCP 34 (APPLICATION2) go to queue 4, guaranteed 12% of 50 Mbps.
srr-queue bandwidth share 2 6 80 12
Step7: Enabling priority queue 1 on link egress ports: Port 1/0/5 on 3750 and GE 2/15 on
Step8: Limits interface speed to the offered link speed by the telco
srr-queue bandwidth limit 5