01-24-2005 04:24 AM - edited 03-03-2019 09:00 AM
Upper management requested traffic prioritization on UK to US link. What I found in attempting to "custom-queue" was that, It must be enabled on the interface globally...(not possible on the sub-interface). It can't be used with Frame-relay traffic-shaping which we run now. And it looks like it can't be run with WRED. Now I must consider what my options will be to satisfy upper managements request after telling them queueing was an available option. I dont' think it would be wise to pull back on the traffic shaping (enabled on the interface globally which houses some 12 subinterfaces) and to tell you the truth, custom-queing in this case may be to simple a solution anyhow. Any suggestions on directions much appreciated.
01-26-2005 11:21 AM
Have you considered using the class based approach to prioritizing and/or guaranteeing bandwidth for certain traffic types? This approach can be applied on a frame relay subinterface with the following command:
service-policy output policyname
Here is an example of something we are doing in our network for prioritizing voice and reserving for video:
class-map match-any IP_VIDEO_WAN
match ip dscp af41
match ip dscp cs4
class-map match-any IP_VOICE_WAN
match ip dscp ef
!policy-map WAN_OUTBOUND
class IP_VOICE_WAN
priority percent 30
class IP_VIDEO_WAN
bandwidth remaining percent 20
class DEFAULT_OUT_WAN
bandwidth remaining percent 70
random-detect dscp-based
Hope this helps!
01-26-2005 02:03 PM
Thank-you. Actually I was looking at class maps for cbwfq but that also seems to have caveats when bandwidth is specified on your sub-interfaces. I am now uprading the mem on the router ....(over 90% at dayshift) and looking at compression (tcp header or frame-relay payload) on the specific sub-interface.
The dscp I thought was a switching qos option at this time.
02-06-2005 09:07 PM
Are you saying that Custom queuing is not available under the map class for FRTS.
Latter versions of IOS provide priroity and custom queuing and fair-queuing under the Map class which is then provided through the subinterface class statement.
I am running fair-queuing under FRTS map class and there doesn't appear to be any issues.
Just need the correct IOS levels and can run whatever level of queuin you require on a link basis
03-15-2005 05:12 AM
I agree with gs. I am using LLQ, CBWFQ, PQ and LFI on a point-to-point fr subinterfaces. Do you know what are my QoS options on point-to-multipoint interfaces. It seems that the same could work, provided it applies to the entire serial inerface (ie. no custom configuration on per DLCI mappings...) Any ideas? Thank you.
Stanley
03-15-2005 05:42 AM
ok this is all clearer now. I am running fair-queing now in that subint class.
03-15-2005 05:18 AM
By the way tt WRED works very well. I have implement it this over at several companies, including banks, etc. However you need Enterprise, IP Voice/Plus 12.3.5 IOS at least... and watch your mamory usage. You should max out all memory for best results.
Hope that helps.
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