QoS on PPP/Multilink

[mario.valdez]

Anyone knows if QoS may work on PPP links or just works for Multilink PPP, if that it's the case, what it´s the best implementation of QoS for a PPP link

thanks in advance!!!

[gshonting]

I have used LLQ on ISDN PPP links. Seems to work fine Heres a sample config-

class-map match-all voip

match access-group 150

class-map match-all cmcontrol

match access-group 151

!

!

policy-map voip-64k

class voip

priority 31

class cmcontrol

bandwidth percent 15

class class-default

fair-queue

!

isdn switch-type basic-ni

!

!

!

interface Ethernet0

ip address 192.168.151.1 255.255.255.0

!

interface BRI0

no ip address

encapsulation ppp

dialer pool-member 1

isdn switch-type basic-ni

isdn spid1 41046569020101 4656902

isdn spid2 41046569040101 4656904

isdn incoming-voice modem

fair-queue 64 256 0

ppp authentication chap

!

interface Dialer1

bandwidth 64000

ip address 192.168.101.10 255.255.255.252

encapsulation ppp

dialer pool 1

dialer string 4107303639

dialer-group 1

service-policy output voip-64k

ppp authentication chap

ppp multilink

ppp multilink fragment-delay 10

ppp multilink interleave

multilink max-links 1

!

no ip http server

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.101.9

ip route 192.168.100.0 255.255.255.0 192.168.101.9

!

!

map-class dialer BRI-VOIP

access-list 150 permit ip any any dscp ef

access-list 150 permit ip any any precedence critical

access-list 151 permit ip any any dscp af31

access-list 151 permit ip any any precedence flash

dialer-list 1 protocol ip permit

[mario.valdez]

Thanks GREG

I´ll try the configuration, on my serial

I hope it works

[kanwaljeet]

Hi Mario,

we are an ISP and our POP are connected on FR using Nortel passport 7480.One of our clients wants Voice priortization solution on Isdn dialup.Will the configuration given by you work in this scenario. Is this configuration needed on client router only or Do i need to do anything on POP end router also.waiting for your reply.

Thanks in advance.

kanwal

[dgahm]

Mario,

Here is an example for a frac-T1. You just need to assign the single interface to a multilink group. You have to use multilink for the fragmentation to work properly.

class-map match-all control

description voice control

match ip precedence 3

!

class-map match-all voice

description RTP voice

match ip precedence 5

!

policy-map QueueOut

class voice

priority 448

class control

bandwidth 32

class hidata

bandwidth 32

class lodata

bandwidth 24

class class-default

fair-queue

interface Multilink1

bandwidth 768

ip address 10.235.254.1 255.255.255.252

ip directed-broadcast

ip tcp header-compression iphc-format

service-policy output QueueOut

no cdp enable

ppp multilink

ppp multilink fragment-delay 10

ppp multilink interleave

multilink-group 1

ip rtp header-compression iphc-format

!

interface Serial0/0

bandwidth 768

no ip address

ip directed-broadcast

ip nbar protocol-discovery

encapsulation ppp

no ip mroute-cache

fair-queue

service-module t1 timeslots 1-12

ppp multilink

multilink-group 1

!

[kanwaljeet]

Hi,

The setup is like this

Client H.O--------- POP1------------POP2--------Client B.O

POP1 and POP2 are running FR and are point of presence of an ISP setup.

Client will dial thru ISDN from his Head office as well as Branch office and get connected to ISP. My question is "Is ISDN configuration for voice priortization needed on client end routers only?". Is there anything that needs to be done on ISP end routers. Pls advise.

Regards

kanwal