1. I've multiple remote sites running 2811 routers with QoS enabled for the serial interfaces. Hanging from the routers are either Catalyst 3550 or 3560 switches. My question is that since the QoS is already enabled in the router, does the QoS need to be enabled and configured in the switches too?
2. I also have a Catalyst 6509 running QoS. Hanging off it are some 3560 switches connected via fiber link. Should QoS also be enabled on the 3560s?
Any real benefits of having QoS enabled in both router and switches...?
This depends on the purpose you are using QoS for.
If you have a voice setup where say you are using some kind of IP phones or end vocie devices, then it will be a good idea to have end to end QoS for voice traffic.
On the other hand if you are only looking towards data not involving any critical applications, and where you think your 100 Mbps or Gbps LAN will never face congestion, it might be okay to run QoS only on the slower WAN links
I forgot to mention that we're running VoIP in our network with quite a few IP phones and all remote links are point-to-point T1s.
The reason why I am asking about this is that I am trying to troubleshoot our video conference audio/video quality issue. We use a Polycom unit set at 384kbps and the bandwith for the Video class is 33% (506 kbps). The QoS seems to be working fine as there's no packets dropped from either end of the local and remote routers when the video conference unit is in use, but video and audio are quite choppy at times. The video conference unit is Polycom configured with IP Precedence 4. I've also verified that the config is set the same at the remote unit.
Here's my QoS config in the routers:
class-map match-any Critical-Data2
match protocol citrix
match protocol sqlnet
match protocol sqlserver
match protocol custom-01
match protocol custom-02
match protocol printer
match protocol secure-http
match protocol ntp
match protocol netbios
match protocol custom-03
match protocol custom-04
class-map match-any Network-Control2
match ip dscp cs6
match ip dscp cs2
class-map match-any Interactive-Video2
match ip precedence 4
class-map match-any Call-Signaling2
match ip dscp cs3
class-map match-all Voice2
match ip dscp ef
class-map match-all Scavenger2
match ip dscp cs1
priority percent 20
bandwidth percent 5
set ip dscp af21
bandwidth percent 23
bandwidth percent 5
bandwidth percent 1
priority percent 33
bandwidth percent 10
random-detect dscp 0 36 40
ip address xxx.xxx.xxx.xxx
ip nbar protocol-discovery
ip flow egress
no ip mroute-cache
service-policy output WAN-EDGE2
Is there something I can do to make the audio/video quality better over the WAN link? Should the QoS be enabled in the switches too?
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.