Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

FRoMPLS QoS

In the service provider network with FRoMPLS.

topology is CE1-PE1-CORE-PE2-CE2.

customer network is Frame relay network.

SP policy is when ingress traffic coming to PE1 with DE bit then setting up EXP bit 1 and also exceed packet setting up EXP bit 1.

If, PE2 output interface is becomimg congetion status, then SP want to drop packet with EXP bit 1or DE bit.

Now, I use CB policing at PE1and PE2. but, this is not support queueing control.

I want solving this problem to use DE bit or EXP bit .

What solution is this policy?

2 ACCEPTED SOLUTIONS

Accepted Solutions
Purple

Re: FRoMPLS QoS

Here's one possible solution - assuming that anything tagged with Exp1 is more likely to be dropped then anything else that is not...

class-map NonExp1

match mpls experimental topmost 0 2 3 4 5 6 7

!

policy-map Output

class NonExp1

bandwidth

class class-default

fair-queue

!

With the above policy, all traffic marked EXP 1 will fall through to class-default. Since you have not give class-default a bandwidth reservation, it will only get service if the NonExp1 class is not using up all the bandwidth. Therefore, in times of congestion, your class-default traffic (i.e. EXP 1 traffic) will get dropped and everything else will go through.

Hope that helps - pls rate the post if it does.

Paresh

Re: FRoMPLS QoS

Hello,

you could match on the DE bit outgoing. Or you match on Exp bits on incoming interface to the PE and set a qos-group for the specific traffic. Something like

ip cef

class-map match-all Exp1

match mpls experimental 1

policy-map PEin

class Exp1

set qos-group 1

class-map match-all QoSgr1

match qos-group 1

policy-map CustOUT

class QoSgr1

bandwidth 128

NB.: I did not implement FRoMPLS in a production environment, so it might not work with your network.

Hope this helps! Please rate all posts.

Regards, Martin

4 REPLIES
Purple

Re: FRoMPLS QoS

Here's one possible solution - assuming that anything tagged with Exp1 is more likely to be dropped then anything else that is not...

class-map NonExp1

match mpls experimental topmost 0 2 3 4 5 6 7

!

policy-map Output

class NonExp1

bandwidth

class class-default

fair-queue

!

With the above policy, all traffic marked EXP 1 will fall through to class-default. Since you have not give class-default a bandwidth reservation, it will only get service if the NonExp1 class is not using up all the bandwidth. Therefore, in times of congestion, your class-default traffic (i.e. EXP 1 traffic) will get dropped and everything else will go through.

Hope that helps - pls rate the post if it does.

Paresh

New Member

Re: FRoMPLS QoS

thanks for your help.

but, label is already poped on outgoing interface.

which is to change just frame relay frame.

Is it not correct?

and then, I want to change exp 1 to de bit with priority change

Re: FRoMPLS QoS

Hello,

you could match on the DE bit outgoing. Or you match on Exp bits on incoming interface to the PE and set a qos-group for the specific traffic. Something like

ip cef

class-map match-all Exp1

match mpls experimental 1

policy-map PEin

class Exp1

set qos-group 1

class-map match-all QoSgr1

match qos-group 1

policy-map CustOUT

class QoSgr1

bandwidth 128

NB.: I did not implement FRoMPLS in a production environment, so it might not work with your network.

Hope this helps! Please rate all posts.

Regards, Martin

New Member

Re: FRoMPLS QoS

thank you for your advice.

I solved this problem.

example is bellow.

policy-map PEin

class Exp1

set qos-group 1

class-map match-all QoSgr1

match not qos-group 1

policy-map CustOUT

class QoSgr1

bandwidth 128

class class-default

fair-queue

set fr-de

170
Views
0
Helpful
4
Replies
CreatePlease to create content