Hi Kok,
You can mark your voip traffic marked to the ef (express forwarding).
You can define the ACL by permitting the voip traffic like the below. This is just an example.
=========================================================================
mls qos map dscp-mutation qm_trust_valid_dscp 1 2 3 4 5 6 7 8 to 0
mls qos map dscp-mutation qm_trust_valid_dscp 9 10 11 12 13 14 15 16 to 0
mls qos map dscp-mutation qm_trust_valid_dscp 17 19 21 22 23 24 25 27 to 0
mls qos map dscp-mutation qm_trust_valid_dscp 29 30 31 32 33 34 35 36 to 0
mls qos map dscp-mutation qm_trust_valid_dscp 37 38 39 40 41 42 43 44 to 0
mls qos map dscp-mutation qm_trust_valid_dscp 45 47 49 50 51 52 53 54 to 0
mls qos map dscp-mutation qm_trust_valid_dscp 55 57 58 59 60 61 62 63 to 0
mls qos map dscp-cos 8 9 10 11 12 13 14 15 to 0
mls qos map dscp-cos 16 17 19 21 22 23 24 25 to 0
mls qos map dscp-cos 27 29 30 31 32 33 34 35 to 0
mls qos map dscp-cos 36 37 38 39 40 41 42 43 to 0
mls qos map dscp-cos 44 45 47 49 50 51 52 53 to 0
mls qos map dscp-cos 54 55 57 58 59 60 61 62 to 0
mls qos map dscp-cos 63 to 0
mls qos map cos-dscp 0 0 18 26 0 46 48 56
mls qos srr-queue output dscp-map queue 1 threshold 1 48 56
mls qos srr-queue output dscp-map queue 2 threshold 1 16 17 19 21 22 23 24 25
mls qos srr-queue output dscp-map queue 2 threshold 1 27 29 30 31 32 33 34 35
mls qos srr-queue output dscp-map queue 2 threshold 1 36 37 38 39 40 41 42 43
mls qos srr-queue output dscp-map queue 2 threshold 1 44 45 47 49 50 51 52 53
mls qos srr-queue output dscp-map queue 2 threshold 1 54 55 57 58 59 60 61 62
mls qos srr-queue output dscp-map queue 2 threshold 1 63
mls qos srr-queue output dscp-map queue 4 threshold 1 26 28
mls qos
!
ip access-list extended voip_forward_class
permit udp < range 16384 32767 any
permit tcp any range 2000 2002 ! SCCP
permit tcp any eq 1720 ! H323
permit udp any eq 2427 ! H323
permit tcp any eq 2428 ! H323
permit tcp any range 11000 11999 ! H323
permit udp any eq 5060 ! SIP
permit tcp any eq 5060 ! SIP
permit udp any eq 1719 ! H232
permit tcp any eq 1719 ! H232
permit tcp any eq 5010 ! IPSI
permit tcp any eq 1039 ! H248
permit tcp any eq 2945 ! H248
permit tcp any eq 5011 ! H323
deny ip any any
!
class-map match-all cmap_voip_forward_class
match access-group name voip_forward_class
!
policy-map pmap_voip_traffic
class cmap_voip_forward_class
set dscp ef
!
interface range gig 0/1-48
service-policy input pmap_voip_traffic
!
You can further fine tune it actually.
Please apply the similar and let me know if that goes fine.
Please do rate if the given information helps.
By
Karthik
