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New Member

Basic QoS question

Hello one and all,

Have the following qos question which I am having trouble understanding...

First off, let me state my purpose: What im trying to acheive is to QoS tag VoIP traffic from the ISP entering the router interface as EF so we can do internal QoS on the clients internal switches - the incoming traffic from the ISP has no qos markings.

The setup so far:

Have setup a rule to tag incoming VoIP traffic (101110 = DSCP 46) on a particular interface on a router. Something like this:

VoIP LAN traffic into -> fa0/1 -> outgoing VoIP traffic tagged and prioritised and delivered to the ISP (fa0/1 is the interface that links to the ISP)

My question is will this port fa0/1 also tag WAN traffic received back from my ISP? - so does my incoming rule on fa0/1 tag both incoming traffic from the LAN side and incoming traffic from the WAN side? Or should I look at tagging incoming traffic from the ISP elsewhere like on fa1/1 which is the trunk to the switch...

Thanks,

Jono Bedford

Auckland, New Zealand.

Everyone's tags (3)
1 ACCEPTED SOLUTION

Accepted Solutions
Green

Basic QoS question

The behavior of the switch, in Basic QoS will trust already mark traffic and mark only ingress traffic. So if an egress mark from the router, the switch trusts it. If no mark from the router, the traffic will get mark on the ingress port of the switch.

-Tom

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
3 REPLIES
Green

Basic QoS question

Hi Jono, what switch?

The small business switches are ingress only.

-Tom

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
New Member

Basic QoS question

Hi Thomas,

The router is a 1841

the switch is a SGE2000P

Thanks,

Jono.

Green

Basic QoS question

The behavior of the switch, in Basic QoS will trust already mark traffic and mark only ingress traffic. So if an egress mark from the router, the switch trusts it. If no mark from the router, the traffic will get mark on the ingress port of the switch.

-Tom

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
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