Hello. I'm attempting to provide some priority (not exactly QOS) on a Cisco 827 for VOIP. The trouble I'm having is portraying correct bandwidth so that the router can prioritize packets for an asymetric line. It's ADSL 1.5m down, and 256k up.
Our VOIP partner has provided me with the info that the TOS=12, and I put precedence critical on anything tos 12. I'm really only concerned with overloading the upstream bandwidth. If our customers are eating up 1.5 or a 3.0 mb ckt, they need to look at something besides DSL for internet.
For testing, I have 1 IP phone (Cisco 7960) and 1 laptop. The phone uses skinny (some devices use MCGP, but few customers have these) to connect to an asterisk box. I ftp a file up to a server, thus overloading the upstream.
Calls are pretty choppy. Any help would be greatly appreciated. Sanitized config and version to follow:
sh conf Using 2026 out of 131072 bytes ! version 12.3 no service pad service timestamps debug uptime service timestamps log uptime service password-encryption ! hostname Adsl ! boot-start-marker boot-end-marker ! enable secret ################### ! no aaa new-model ip subnet-zero ip name-server 1.1.1.1 ip name-server 2.2.2.2 ip dhcp excluded-address 10.10.10.1 ! ip dhcp pool CLIENT import all network 10.10.10.0 255.255.255.0 default-router 10.10.10.1 lease 0 2 ! username Adsl password ################## username CRWS_Ulags privilege 15 password ###################### ! ! class-map match-all voip-rtp ! ! policy-map qos-policy class voip-rtp priority 32 class class-default fair-queue ! ! ! interface Ethernet0 ip address 10.10.10.1 255.255.255.0 ip nat inside no ip mroute-cache hold-queue 100 out ! interface ATM0 no ip address no ip mroute-cache atm vc-per-vp 64 no atm ilmi-keepalive dsl operating-mode auto pvc 8/35 cbr 256 encapsulation aal5mux ppp dialer dialer pool-member 1 service-policy output qos-policy ! ! interface Dialer1 ip address negotiated ip nat outside encapsulation ppp dialer pool 1 dialer-group 1 ppp authentication chap pap callin ppp chap hostname snipped-for-privacy@user.net ppp chap password ########### ppp pap sent-username snipped-for-privacy@user.net password ############### ppp ipcp dns request ppp ipcp wins request hold-queue 224 in ! ip nat inside source list 102 interface Dialer1 overload ip classless ip route 0.0.0.0 0.0.0.0 Dialer1 ip http server ! access-list 101 permit ip any any precedence critical tos 12 access-list 102 permit ip 10.10.10.0 0.0.0.255 any dialer-list 1 protocol ip permit priority-list 1 protocol ip high list 101 priority-list 1 protocol ip low list 102 ! ! line con 0 exec-timeout 120 0 transport preferred all transport output all stopbits 1 line vty 0 4 exec-timeout 120 0 login local length 0 transport preferred all transport input all transport output all ! scheduler max-task-time 5000 end
Adsl#
Adsl#sh ver Cisco Internetwork Operating System Software IOS (tm) C820 Software (C820-SY6-M), Version 12.3(13), RELEASE SOFTWARE (fc2) Technical Support:
ROM: System Bootstrap, Version 12.1(1r)XB1, RELEASE SOFTWARE (fc1) ROM: C820 Software (C820-SY6-M), Version 12.3(13), RELEASE SOFTWARE (fc2)
Adsl uptime is 23 hours, 25 minutes System returned to ROM by reload System image file is "flash:c820-sy6-mz.123-13.bin"
CISCO C827 (MPC855T) processor (revision 0x901) with 23552K/1024K bytes of memor y. Processor board ID JAD072706PV (2716654291), with hardware revision
0000 CPU rev number 5 Bridging software. 1 Ethernet/IEEE 802.3 interface(s) 1 ATM network interface(s) 128K bytes of non-volatile configuration memory. 8192K bytes of processor board System flash (Read/Write) 2048K bytes of processor board Web flash (Read/Write)Configuration register is 0x2102