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New Member

MC3810 VoIP IOS 12.0 REALLY URGENT !!!!!

Have a VoIP Network with MC3810´s, IOS mc3810-a2isv5-mz.120-7.XK1.bin, 32MB RAM and 8MB Flash....

Have problems with voice quality, anyone who can advise me how to implement Qos?

I´m using IPRSV BANDWIDTH 40,IP PRESEDENCE,FRAME RELAY IP RTP HEADER COMPRESSION,FRAG 80 BYTES,

Corpo

6 Voice cards.....

512k

!

interface Serial0

bandwidth 512

no ip address

no ip directed-broadcast

encapsulation frame-relay

no ip mroute-cache

ignore-dcd

frame-relay traffic-shaping

frame-relay lmi-type ansi

frame-relay ip rtp header-compression

hold-queue 1024 out

ip rsvp bandwidth 220 220

!

!

interface Serial0.1 point-to-point

description Wan GDL 2

bandwidth 64000

ip address 192.168.102.73 255.255.255.252

no ip directed-broadcast

no ip mroute-cache

no cdp enable

frame-relay interface-dlci 102

class VoIP12k

ip rsvp bandwidth 48 48

!

(5 places like this..)

!

map-class frame-relay VoIP32k

no frame-relay adaptive-shaping

frame-relay cir 64000

frame-relay bc 300

frame-relay be 0

frame-relay mincir 64000

frame-relay fair-queue

frame-relay fragment 80

frame-relay ip rtp priority 16384 16383 48

!

Dial-peers like this...

!

dial-peer voice 11 voip

destination-pattern 11.

session target ipv4:192.168.102.70

dtmf-relay cisco-rtp

ip precedence 5

!

At remote

2 voice cards

64k

interface Serial0

bandwidth 64

no ip address

no ip directed-broadcast

encapsulation frame-relay

no ip mroute-cache

ignore-dcd

frame-relay traffic-shaping

frame-relay lmi-type ansi

frame-relay ip rtp header-compression

hold-queue 1024 out

ip rsvp bandwidth 40 40

!

!

interface Serial0.1 point-to-point

description Wan GDL 2

bandwidth 64000

ip address 192.168.102.73 255.255.255.252

no ip directed-broadcast

no ip mroute-cache

no cdp enable

frame-relay interface-dlci 102

class VoIP12k

ip rsvp bandwidth 40 40

!

(5 places like this..)

!

map-class frame-relay VoIP12k

no frame-relay adaptive-shaping

frame-relay cir 64000

frame-relay bc 300

frame-relay be 0

frame-relay mincir 64000

frame-relay fair-queue

frame-relay fragment 80

frame-relay ip rtp priority 16384 16383 40

!

Dial-peers like this...

!

dial-peer voice 11 voip

destination-pattern 11.

session target ipv4:192.168.102.70

dtmf-relay cisco-rtp

ip precedence 5

!

When data traffic flows , voice is choppy, even when there is no data at one location voice isn´t good at some intervals......

Regards

LN

2 REPLIES
New Member

Re: MC3810 VoIP IOS 12.0 REALLY URGENT !!!!!

Sounds like you really need to have somebody look at the stats out of the whole router (like SHOW TECH) overall, rather than just review these portions of the config. You've got a lot of processes going on with all that queuing and traffic shaping, plus whatever's happening in the parts you're not showing, and they ALL take CPU cycles and DRAM. Performance issues are ALWAYS hard to troubleshoot, and unless you've got experience analyzing these kinds of status, you may be better off having the TAC help you with it.

New Member

Re: MC3810 VoIP IOS 12.0 REALLY URGENT !!!!!

Under the dial-peer voice 11 voip you need the command:

req-qos guaranteed-delay

To specify the desired quality of service to be used in reaching a specified dial peer, use the req-qos dial peer configuration command.

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