From: Toh Soon, Lim (tohsoon28@gmail.com)
Date: Fri Oct 26 2007 - 10:14:33 ART
Hi Darren,
I modified the PQ to match ICMP packets instead, as follows:
!
map-class frame-relay LEGACY_FRTS
frame-relay priority-group 2
!
access-list 110 permit icmp any any
priority-list 2 protocol ip high list 110
!
interface Serial0/0/0
frame-relay traffic-shaping
frame-relay interface-dlci 105
class LEGACY_FRTS
!
Turned on "deb priority" on this router and do "ping <remote_router> rep
10000 size 3000". The following messages appeared:
PQ: Serial0/0/0 dlci 105: ip (s=150.50.100.2, d=150.50.100.5) -> high
PQ: Serial0/0/0 dlci 105: ip (s=150.50.100.2, d=150.50.100.5) -> high
When this happened, I notice the outputs of "sh fram pvc 105" indicating
shaping has become active and there are delayed packets, as follows:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
R2#sh fram pv 105
PVC Statistics for interface Serial0/0/0 (Frame Relay DTE)
DLCI = 105, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0/0
input pkts 5901 output pkts 5948 in bytes 1225269
out bytes 1249666 dropped pkts 0 in pkts dropped
0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 57 out bcast bytes 4788
5 minute input rate 22000 bits/sec, 3 packets/sec
5 minute output rate 19000 bits/sec, 2 packets/sec
pvc create time 07:35:46, last time pvc status changed 07:34:26
cir 56000 bc 7000 be 0 byte limit 875 interval 125
mincir 28000 byte increment 875 Adaptive Shaping none
pkts 5949 bytes 1250270 pkts delayed 542 bytes delayed
364081
shaping active
traffic shaping drops 0
Queueing strategy: priority-list 2
List Queue Args
2 high protocol ip list 110
Output queue: high 0/20/0, medium 0/40/0, normal 0/60/0, low 0/80/0
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You could be right. In times of congestion, the queueing comes into effect.
In this case, when the traffic rate exceeds the default shaped rate, i.e.
56kbps.
Do correct me if I'm wrong. I'm still learning it :)
Thank you.
B.Rgds,
Lim TS
On 10/17/07, Darren Johnson <dazza_johnson@yahoo.co.uk> wrote:
>
> Hang on, I might be missing something here, but I thought queuing is only
> applied 'when there is congestion'. If there is no congestion, then fancy
> queuing is not needed/used.
>
> Like I say, I may be off the mark here, just an idea....
>
> Dazzler
>
> ----- Original Message ----
> From: "Wilson, Ryan # Atlanta" <Ryan.Wilson@relayhealth.com>
> To: John <jgarrison1@austin.rr.com>; ccielab@groupstudy.com
> Sent: Tuesday, 16 October, 2007 1:51:46 AM
> Subject: RE: FRTS and priority queuing
>
> John,
>
> I dropped your config into my LAB and I'm getting the results. I changed
> the default from normal to low and no hits on the low either. How ever
> the classification is done obviously isn't working for us.
>
>
> priority-list 2 protocol ip high udp tftp
> priority-list 2 default low
>
> Output queue utilization (queue/count)
> high/0 medium/0 normal/3707 low/0
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> John
> Sent: Monday, October 15, 2007 12:59 PM
> To: ccielab@groupstudy.com
> Subject: FRTS and priority queueing
>
> I have the following configs on 2 routers with Frame-relay running
> between
> them.
> R5
> interface Serial2/0
> ip address 155.1.0.5 255.255.255.0
> encapsulation frame-relay
> ip ospf network broadcast
> no fair-queue
> serial restart-delay 0
> frame-relay traffic-shaping
> frame-relay map ip 155.1.0.4 504 broadcast
> frame-relay interface-dlci 504
> class shape1
> no frame-relay inverse-arp
> !
> map-class frame-relay shape1
> frame-relay priority-group 2
> priority-list 2 protocol ip high udp tftp
>
> R4
> interface Serial2/0
> ip address 155.1.0.4 255.255.255.0
> encapsulation frame-relay
> ip ospf network broadcast
> no fair-queue
> serial restart-delay 0
> frame-relay traffic-shaping
> frame-relay map ip 155.1.0.5 405 broadcast
> frame-relay interface-dlci 405
> class shape1
> no frame-relay inverse-arp
> !
> map-class frame-relay shape1
> frame-relay priority-group 2
> priority-list 2 protocol ip high udp tftp
>
> When I tftp a file across the link the debug queueing priority tells me
> that
> the traffic is going into the default queue. Instead of the high
> priority
> queue. I'm obviously missing something. A little help please?
>
> Thanks
>
> JG
>
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