Testing QoS with Cisco Call Manager and SIP,RTP - How To

This is the practical to this lab: here


Setting up basic IP connectivity:
R1

!
interface FastEthernet0/0
description ToLan
ip address 192.168.10.254 255.255.255.0
duplex auto
speed auto
!
!
interface Serial0/0.123 multipoint
bandwidth 110
ip address 192.168.0.1 255.255.255.0
ip ospf network point-to-multipoint
snmp trap link-status
frame-relay map ip 192.168.0.2 122 broadcast
frame-relay map ip 192.168.0.3 123 broadcast
no frame-relay inverse-arp
!
!
router ospf 1
router-id 1.1.1.1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 1
network 192.168.0.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.255 area 1
!



R2

!
interface FastEthernet0/0
description ToLan
ip address 192.168.10.254 255.255.255.0
duplex auto
speed auto
!
!
interface Serial0/0.123 multipoint
bandwidth 110
ip address 192.168.0.1 255.255.255.0
ip ospf network point-to-multipoint
snmp trap link-status
frame-relay map ip 192.168.0.2 122 broadcast
frame-relay map ip 192.168.0.3 123 broadcast
no frame-relay inverse-arp
!
!
router ospf 1
router-id 1.1.1.1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 1
network 192.168.0.0 0.0.0.255 area 0
network 192.168.10.0 0.0.0.255 area 1
!


R3

!
interface FastEthernet0/0
ip address 192.168.3.254 255.255.255.0
duplex auto
speed auto
!
!
interface Serial0/0.321 multipoint
bandwidth 110
ip address 192.168.0.3 255.255.255.0
ip ospf network point-to-multipoint
frame-relay map ip 192.168.0.1 321 broadcast
frame-relay map ip 192.168.0.2 321 broadcast
!
!
router ospf 1
router-id 3.3.3.3
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 3
network 192.168.0.0 0.0.0.255 area 0
network 192.168.3.0 0.0.0.255 area 3
!


Set up DHCP for Call Manager/TFTP
R1

ip dhcp excluded-address 192.168.10.1
ip dhcp excluded-address 192.168.10.100
ip dhcp excluded-address 192.168.10.254
!
ip dhcp pool POOL1
network 192.168.10.0 255.255.255.0
option 66 ip 192.168.10.100
default-router 192.168.10.254
!


(Pretty much the same on each router)


Now the important Stuff - QoS for SIP and RTP...

First the ACLs:

!
!Control is for SIP messages
ip access-list extended VOIP-CONTROL-ACL
permit tcp any any eq 5060
permit tcp any eq 5060 any
permit tcp any any eq 6970
permit tcp any eq 6970 any
! RTP is for the actual voices going down the line
ip access-list extended VOIP-RTP-ACL
permit udp any any eq 5060
permit udp any eq 5060 any
permit udp any any range 16384 32767
permit ip any any dscp ef
!


Now the Class Maps:

!
class-map match-any VOIP-CONTROL-CLASS
match access-group name VOIP-CONTROL-ACL
class-map match-any VOIP-RTP-CLASS
match access-group name VOIP-RTP-ACL
!



Now the Policy Maps:

!
policy-map VOIP
class VOIP-RTP-CLASS
priority 70
class VOIP-CONTROL-CLASS
bandwidth 8
class class-default
fair-queue
!


Map Class - Frame Relay:

!
map-class frame-relay FRAME-CLASS
!Provided by ISP
frame-relay cir 110000
!Set Tc to 10ms or 0.01 sec
frame-relay bc 1100
frame-relay be 0
!If you get a BECN set to this rate
frame-relay mincir 110000
!Remember to place this on both ends
frame-relay fragment 120
!Policy map
service-policy output VOIP
!





A few little extras(needed):

!
interface Serial0/0
bandwidth 400
no ip address
encapsulation frame-relay
frame-relay traffic-shaping
no frame-relay inverse-arp
frame-relay ip rtp header-compression
!
!
interface Serial0/0.123 multipoint
bandwidth 110
ip address 192.168.0.1 255.255.255.0
ip ospf network point-to-multipoint
snmp trap link-status
frame-relay class FRAME-CLASS
frame-relay map ip 192.168.0.2 122 broadcast
frame-relay map ip 192.168.0.3 123 broadcast
no frame-relay inverse-arp
!




Here is a video of the lab set up and me trying to break it!

Testing Quality of Service with Cisco Call Manager,VoIP from Richard Vimeo on Vimeo.

Here are the iPerf options I am using:
Server UDP:

iperf.exe -us -n 128m -i5

Client UDP:

iperf.exe -uc 192.168.2.3 -b256k -n 1G -i5 -d


*Remember if you wish to test DSCP tags try the "-s" options to tag the packets for example: "-s ef"