02-02-2006 02:44 AM
hi
what is the best solution QoS, for a link of 128kbps....
PQ-WFQ
LLQ
thanks,
Hugo
Solved! Go to Solution.
02-02-2006 02:59 AM
Hi Hugo,
PQ/WFQ is no longer the recommended way of doing this. Therefore, I suggest you go with 128kbps. The other thing you will have to do is Link Fragmentation and Interleaving (LFI) since you will have significant issues with serialisation delay at 128k. The options you have are:
- FRF.12 if using Frame Relay
- Multilink PPP (MLP) with interleaving if using other link-layer technologies. You can run MLP over FR and MLP over ATM too.
Hope that helps - pls rate the post if it does.
Paresh
02-02-2006 02:59 AM
Hi Hugo,
PQ/WFQ is no longer the recommended way of doing this. Therefore, I suggest you go with 128kbps. The other thing you will have to do is Link Fragmentation and Interleaving (LFI) since you will have significant issues with serialisation delay at 128k. The options you have are:
- FRF.12 if using Frame Relay
- Multilink PPP (MLP) with interleaving if using other link-layer technologies. You can run MLP over FR and MLP over ATM too.
Hope that helps - pls rate the post if it does.
Paresh
02-02-2006 03:12 AM
I just have a serial link DTE with DCE.....
two routers
thanks
hugo
02-02-2006 09:42 AM
Hi Paresh,
In my case I have one router with two Eth interfaces.
My provider not provided v.35 interfaces.
I have a link to 128 Kbps working on the Eth0 interface .
In this case , the serialisation is a problem ?
How can I improve my config ?
Here the config in my router :
ip access-list extended VoIPCID1000
permit udp any any range 16384 32767
permit tcp any any eq 1720
permit tcp any eq 1720 any
!
class-map match-any VoIP
match ip precedence 5
match access-group name VoIPCID1000
!
policy-map wan-CID1000
class VoIP
priority 40
class class-default
fair-queue
!
policy-map sedes
class class-default
shape average 128000
service-policy wan-CID1000
!
interface loopback 1
description IP para VoIP
ip address 10.10.30.2 255.255.255.255
h323-gateway voip bind srcaddr 10.10.30.2
interface Ethernet0/0
description WAN
ip address 10.9.30.114 255.255.255.240
service-policy output sedes
!
voice-port 1/0/0
!
voice-port 1/0/1
!
dial-peer voice 1 pots
destination-pattern 200
port 1/0/0
!
dial-peer voice 100 voip
incoming called-number 200
destination-pattern 100
session target ipv4:10.10.30.1
codec g729r8 bytes 80
ip precedence 5
no vad
!
dial-peer voice 110 voip
destination-pattern 300
session target ipv4:10.10.30.3
codec g729r8 bytes 80
ip precedence 5
no vad
Thks /Juan Carlos G
02-02-2006 08:25 PM
Hi Juan,
Serialization delay will not be a problem in your case, since you are using an Ethernet access. However, the shaping interval will be a problem. Ideally, you want to use a shaping interval of 10ms. In your case, that equates to 1280 bits (160 bytes). Since your data packets could be up to 1500 bytes, this will not help you.
There is no LFI mechanism that you can use with Ethernet so I'm afraid you don't have too many options here. You need to have at least a 768k service to be able to run voice traffic properly.
Hope that helps - pls rate the post if it does.
Paresh
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