Hi
I've go a Cisco CISCO2901/K9 running c2900-universalk9-mz.SPA.152-4.M4.bin connected to my ISP and SIP provider using two different dialers attached to the same physical interface Gi0/1. My provider gives 4Mbps link split into 3Mbps for Data and 1Mpbs for Voice. Dialer 1 is for data and Dialer2 is for voice.I tried first to apply traffic shaping on Dialer1 for limitting it going above 3Mbps and so leaving the remaining 1Meg but that didnt work. Even though I was seding more that 3Megs via data network, traffic shapping applied to Dialer1 didn't seem to work. See "policy dialer.png"
So finally I decided to apply QoS on the physical interface shaping to 4Mbps (maximum capacity of the service) and prioritizing voice using config below.
interface Dialer1 description *** WAN 3M Public Internet *** bandwidth 3000 bandwidth inherit ip address negotiated ip access-group Outside-ACL in no ip redirects no ip unreachables no ip proxy-arp ip flow ingress ip flow egress ip nat outside ip inspect Firewall out ip virtual-reassembly in encapsulation ppp load-interval 30 dialer pool 1 dialer-group 1 ppp authentication chap callin ppp chap hostname [REMOVED] ppp chap password [REMOVED] no cdp enable crypto map siteconnect ! interface Dialer2 description *** SIP 1M LINK *** bandwidth inherit ip address negotiated no ip redirects no ip unreachables no ip proxy-arp encapsulation ppp load-interval 30 dialer pool 2 dialer-group 2 ppp authentication chap callin ppp chap hostname [REMOVED] ppp chap password [REMOVED]
!interface GigabitEthernet0/1 description *** WAN 4M LINK TO PROVIDER *** no ip address load-interval 30 duplex full speed 100 pppoe enable group global pppoe-client dial-pool-number 2 pppoe-client dial-pool-number 1 no cdp enable service-policy output QOS_OUT!
class-map match-any VOIP match dscp ef match precedence 5 class-map match-any VOIP-SIGNALLING match dscp af31 match dscp cs3 ! policy-map CHILD class VOIP priority percent 33 class VOIP-SIGNALLING bandwidth percent 5 class class-default fair-queue policy-map QOS_OUT description ** SHAPPING TO 4M AND QoS FOR VOICE ** class class-default shape average 4000000 service-policy CHILD
However, above config doesn't stop data traffic from going above the 3Meg limit as there's no way in the
config that prevents that from happening. Anyhow, my questions are these two:
1./ Even though I've got QoS applied on the Physical interface, my customer is complaining that sometimes
the quality of the voice is not good. I don't understand it cos it seems QoS is working from below pic. Based on
the above config, that's the way to apply QoS, right? See "Qos.png" file
2./ Is there a smart way of completely limiting the amount of data used by Dialer1 (ie no more than 3Megs) so
I don't need to deal with QoS as Dialer 2 would have 1Meg for its own?
Thanks in advance
