Simple Cisco QOS configuration. Since a couple of days back I had to configure QOS on a Cisco router with 5 mbit of synchrone internet connection. To archive a configuration I had to figure out if i could find a simple way to create a QOS templete for VOICE & Citrix combined.
Step one [ configuring an access list for citrix ]:
ip access-list extended CITRIX permit tcp <ip range of lan + wildcard subnet> any eq 1494 permit tcp <ip range of lan + wildcard subnet> any eq 2598 permit udp <ip range of lan + wildcard subnet> any eq 2598 permit udp <ip range of lan + wildcard subnet> any eq 1494
Step two [configuring an Policy map ]:
policy-map QOS class VOICE priority 1024 [ this 1024 I used for the continue bandwidth limit for voice ] set dscp ef class CITRIX bandwidth remaining percent 50 [ this is the remaining bandwidth limit for citrix ] set dscp af43 class class-default fair-queue [ This is the rest of the bandwidth which is available for usage ] set dscp default policy-map ALL class SHAPING shape average 4750000 [ this is the shaped speed of the internet line ] service-policy QOS
Step three [ configering class-maps]:
class-map match-all CITRIX match access-group name CITRIX class-map match-all SHAPING match any class-map match-all VOICE match access-group name VOICE
After this you need to actived all the QOS settings to the interface you need it.
interface FastEthernet0/0 bandwidth 5000 max-reserved-bandwidth 100 service-policy output ALL
Hoi Glazenbakje,
Waarom niet voor de VOICE class-map in stap 3
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class-map match-any VOICE
match dscp ef
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Gewoon nieuwsgierig….
Dat is een goede vraag. De manier waarop ik het destijds had gedaan was de meest voor de hand liggende optie. Nu zou het kunnen zijn dat ik het op een andere manier gedaan te hebben. Zoveel QOS configuraties heb ik laatste tijd niet gedaan, wellicht dat ik ongeveer dezelfde configuratie de volgende keer weer ga gebruiken.
Maar iedere input voor optimalisering van een configuratie is altijd welkom.
Hi glazenbakje,
I have seen the same style configuration template in the past and I have the questions below:
1. Where do you mark the interesting traffic? I suppose in the below command. How your router will read the inderesting traffic in order to prioritize by itself before to send it out? Maybe you need to have the marking on the Lan interface applied?
policy-map QOS
class VOICE
priority 1024 [ this 1024 I used for the continue bandwidth limit for voice ]
set dscp ef —> Here?
2. The policy is been applied on the outside interface which means everything will be applied by the exit of the traffic. In case of ADSL circuit I don’t think the ISP’s read QoS values and treat the traffic is being sent to them as bulk with FIFO.
3. In the command below I suppose you use the upload of the line? As it is related to the outbound traffic.
policy-map ALL
class SHAPING
shape average 4750000 [ this is the shaped speed of the internet line ] —-> Here
service-policy QOS
Thanks.