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New Member

FRTS problem

I had next configuration of 2811 router-

interface Serial0/1/0

description ###Port to MPLS 384 kbps ###

encapsulation frame-relay

load-interval 30

frame-relay interface-dlci 16

frame-relay lmi-type ansi

service-policy output VoIP

!

policy-map VoIP

class VOICE

set ip precedence 5

priority 256

class SIGNAL

bandwidth 8

set precedence 3

!

class-map match-all SIGNAL

match access-group name signaling

class-map match-any VOICE

match protocol rtp

match access-group 101

!

That policy worked without problems.

I tryed to configure FRTS and set the fragment size -

map-class frame-relay VOIPovFR

no frame-relay adaptive-shaping foresight

frame-relay cir 384000

frame-relay bc 3840

frame-relay be 0

frame-relay mincir 384000

service-policy output VoIP

frame-relay fragment 480

!

interface Serial0/1/0

encapsulation frame-relay

load-interval 30

frame-relay traffic-shaping

frame-relay interface-dlci 16

class VOIPovFR

frame-relay lmi-type ansi

!

After applying that my router became unaccessible, the cpu load growed up to 40% and the packets which floated through that interface also was upper 480 bytes. Seems it was not worked.

Where i was wrong?

4 REPLIES
Silver

Re: FRTS problem

Your config looks great. The only thing I can think the problem could be is that you didn't enable fragmentation on the other end.

When you do this, all packets over 480 bytes are fragmented by frame relay, and will be dropped since the other end doesn't recognize the fragmentation header.

Will

New Member

Re: FRTS problem

yes, i didn't do it... but at the other side i have SP router-it's MPLS port. How to be in that situation?

Silver

Re: FRTS problem

You're going to need to call your telco and ask them to fragment to the same value you are.

Most of the time they'll be happy to do it.

New Member

Re: FRTS problem

i think you should do fr framgment on both sides.

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