04-11-2007 10:38 AM - edited 03-03-2019 04:30 PM
Hey guys!
It's been a while since I ran into the old "DLSW" Demons and was wondering.....
What's the best way to control this type of traffic? The company relies heavily on their AS400
boxes and every once in a while an FTP session or some bandwidth hog will knock off their
sessions. Is there any way to commit bandwidth to their DLSW Traffic so that this doesn't happen?
Or is there just a better way of handling the DLSW traffic all together?
I was looking into QOS but not sure if their 7200 12.3 Core router has the ability.
Anyways any helpful ideas would be much appreciated and well rated!
04-11-2007 10:48 AM
Hi,
If you have Cisco 7200 with IOS 12.3, then it would support Qos which you may use for handling DLSW traffic.
See the support of Qos on 7200,12.3.
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/prod_bulletin09186a0080199900.html#wp1003378
Rate if it does,
Rgs,
04-11-2007 11:49 AM
Take a look at:
http://www.cisco.com/en/US/tech/tk331/tk336/technologies_design_guide09186a0080237a48.shtml
for an overview of DLSW QoS and a light overview of QoS in general. Don't think you'll have any issues around this on 7200/12.3. Ie, dlsw tos map has been around since 12.0.
HTH,
Mike
04-11-2007 12:05 PM
You can either use 'match protocol dlsw' in the class-map definition; or you could set IP precedence with 'dlsw tos map'. If you currently don't run QoS and your 7200 is heavily loaded you could match on src/dst addresses of dlsw peers.
The rest is ordinary IP QoS with bandwidth reservation, queueing and scheduling.
Hope this helps.
04-11-2007 12:17 PM
Looks like average utilization for this router is 21%
They have a large number of frame interfaces but traffic shapping is only turned on for a few of them only.
04-11-2007 12:30 PM
Hmmm looks like they are doing some QOS..... not sure what those bc and minicir #'s are correct.
map-class frame-relay Video
frame-relay cir 1024000
frame-relay bc 10240
frame-relay mincir 1024000
no frame-relay adaptive-shaping
service-policy output QoS-Policy
access-list 1 permit 10.18.xx.xx
access-list 1 permit 10.18.xx.xx
access-list 1 permit 10.46.xx.xx
access-list 1 permit 10.18.xx.xx
access-list 1 permit 10.46.xx.xx
access-list 1 permit 10.18.xx.xx
access-list 1 permit 10.14.xx.xx
access-list 1 permit 10.18.xx.xx
access-list 1 permit 10.46.xx.xx
access-list 1 permit 10.46.xx.xx
access-list 1 permit 10.18.0.0 0.0.255.255
access-list 102 permit ip any any dscp cs4
access-list 102 permit ip any any dscp af41
access-list 103 permit ip any any dscp cs1
access-list 103 permit ip any any dscp af13
access-list 110 permit ip 205.235.xx.xx 0.0.0.255 any
access-list 110 permit ip 205.235.xx.xx 0.0.0.255 any
cdp timer 179
route-map VideoRoute permit 10
match ip address 110
set ip precedence critical
!
04-11-2007 01:18 PM
I can't find anything on that "Priority 768" command below....this isn't taking helf the bandwidth of the line and dedicating it to video is it?
policy-map QoS-Policy
class Video-Conf
priority 768
class Streaming-Video
bandwidth 85
class class-default
fair-queue
policy-map T1
description Frame-Relay Traffic-Shaping T1 circuits
class FRTS
shape average 1024000
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