From: Antonio Soares (amsoares@netcabo.pt)
Date: Tue Oct 02 2007 - 10:07:56 ART
Thanks Ash and Avner for you feedback.
You both suggest the use of Auto-QoS. I'll take a closer look although i'm
not a big fan of these type of features. You insert one command and the
router/switch generates dozens for you. I tested the command "auto qos voip
cisco-phone" in a 3750 and got this:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
!
mls qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos srr-queue input bandwidth 90 10
mls qos srr-queue input threshold 1 8 16
mls qos srr-queue input threshold 2 34 66
mls qos srr-queue input buffers 67 33
mls qos srr-queue input cos-map queue 1 threshold 2 1
mls qos srr-queue input cos-map queue 1 threshold 3 0
mls qos srr-queue input cos-map queue 2 threshold 1 2
mls qos srr-queue input cos-map queue 2 threshold 2 4 6 7
mls qos srr-queue input cos-map queue 2 threshold 3 3 5
mls qos srr-queue input dscp-map queue 1 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue input dscp-map queue 1 threshold 3 0 1 2 3 4 5 6 7
mls qos srr-queue input dscp-map queue 1 threshold 3 32
mls qos srr-queue input dscp-map queue 2 threshold 1 16 17 18 19 20 21 22
23
mls qos srr-queue input dscp-map queue 2 threshold 2 33 34 35 36 37 38 39
48
mls qos srr-queue input dscp-map queue 2 threshold 2 49 50 51 52 53 54 55
56
mls qos srr-queue input dscp-map queue 2 threshold 2 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 24 25 26 27 28 29 30
31
mls qos srr-queue input dscp-map queue 2 threshold 3 40 41 42 43 44 45 46
47
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 2 4
mls qos srr-queue output cos-map queue 4 threshold 2 1
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos srr-queue output dscp-map queue 1 threshold 3 40 41 42 43 44 45 46
47
mls qos srr-queue output dscp-map queue 2 threshold 3 24 25 26 27 28 29 30
31
mls qos srr-queue output dscp-map queue 2 threshold 3 48 49 50 51 52 53 54
55
mls qos srr-queue output dscp-map queue 2 threshold 3 56 57 58 59 60 61 62
63
mls qos srr-queue output dscp-map queue 3 threshold 3 16 17 18 19 20 21 22
23
mls qos srr-queue output dscp-map queue 3 threshold 3 32 33 34 35 36 37 38
39
mls qos srr-queue output dscp-map queue 4 threshold 1 8
mls qos srr-queue output dscp-map queue 4 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue output dscp-map queue 4 threshold 3 0 1 2 3 4 5 6 7
mls qos queue-set output 1 threshold 1 138 138 92 138
mls qos queue-set output 1 threshold 2 138 138 92 400
mls qos queue-set output 1 threshold 3 36 77 100 318
mls qos queue-set output 1 threshold 4 20 50 67 400
mls qos queue-set output 2 threshold 1 149 149 100 149
mls qos queue-set output 2 threshold 2 118 118 100 235
mls qos queue-set output 2 threshold 3 41 68 100 272
mls qos queue-set output 2 threshold 4 42 72 100 242
mls qos queue-set output 1 buffers 10 10 26 54
mls qos queue-set output 2 buffers 16 6 17 61
mls qos
!
interface FastEthernet1/0/1
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
!
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I feel like loosing control when i enable this. And do i really need it ?
Regards,
Antonio Soares
CCIE #18473, CCNP, CCIP
http://pwp.netcabo.pt/amsoares/
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Antonio Soares
Sent: terga-feira, 2 de Outubro de 2007 2:18
To: ccielab@groupstudy.com
Subject: QoS in a Campus Network with IP Telephony Solution
Hello group,
I need to configure QoS in a Campus Network composed of several 3750s, 4500s
and 6500s. I'm looking for the minimal config in order to avoid potential
voice quality issues. Right now i have this:
##############################
Catalysts 3750:
##############################
4Q3T (or 1P3Q3T)
##############################
Ports with PC+IP Phone:
##############################
mls qos trust cos
mls qos trust extend cos 0
priority-queue out
##############################
Uplinks:
##############################
mls qos trust dscp
priority-queue out
##############################
##############################
Catalysts 4500:
##############################
4Q1T (or 1P3Q1T)
##############################
Ports with PC+IP Phone:
##############################
qos trust cos
qos trust extend cos 0
tx-queue 3
priority high
##############################
Uplinks:
##############################
mls qos trust dscp
tx-queue 3
priority high
##############################
##############################
Catalyst 6500:
##############################
Ports with PC+IP Phone:
##############################
WS-X6148-45AF
2Q2T
WS-X6348-RJ-45
2Q2T
##############################
mls qos trust cos
mls qos trust extend cos 0
##############################
Uplinks:
##############################
WS-X6724-SFP
1P3Q8T
##############################
mls qos trust dscp
priority-queue cos-map 1 5
##############################
Voice Servers:
##############################
WS-X6748-GE-TX
1P3Q8T
##############################
mls qos trust dscp
priority-queue cos-map 1 5
##############################
I know that Cisco provides a QoS Network Design Guide:
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns432/c649/ccmigrati
on_09186a008049b062.pdf
But i really wonder if i need to implement all those complex configurations
to accomplish my goal.
Any sugestions are welcome.
Thanks.
Regards,
Antonio Soares
CCIE #18473, CCNP, CCIP
http://pwp.netcabo.pt/amsoares/
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:11 ART