From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Mon Oct 28 2002 - 08:55:24 GMT-3
Some comments inline:
aansar@sscomp.com.sg wrote:
> class-map ?
> WORD class-map name
> match-all Logical-AND all matching statements under this classmap
> match-any Logical-OR all matching statements under this classmap
>
> any sample config or explanation for this match-all or match-any
New modular QoS CLI config (MQC) uses class-map for recognition/marking
of traffic. Class maps can be defined with "and" logic (match-all)
or "or" logic (match-any) of the statements in teh class definition.
>
> i read in cco <class-map class-default> and CLI is not accepting the
> command and i am getting this below message
>
> class-map class-default
> class-default is a well-known class and is not configurable under
> class-map , this is not supported any more ?
Which version of IOS are you running ? I've used in 12.2, might
be a 12.2T ? This is news to me...
Anyways, class-default is whatever is not "classified" by the classes
you apply to an interface.
>
> i have couple of doubts in VOIP , anyone knows or have any document on
> which one to use where , pls help
>
> 1.if i use frame relay and use VOIP . do i have to still configure the
> FRTS or just configure ip rtp priority 16384 16383 <bandwidth> as i
> understand this command is equivalent to FR (fram voice bandwidth <xx>) or
> use LLQ
frame voice bandwidth is for VOFR, i.e. amount of bandwith taken (and
policed) for voice using FRF11. ip rtp priority configures LLQ (or
PQ-WFQ as it is called if using CB-WFQ) ad serves when using VOIP.
To make matters worse, you also have frame ip rtp priority, for frame
PVC LLQ.
>
> 2. irrespective of layer 2 if i use voip , can i just use LLQ without ip
> rtp priority 16384 16383 <bandwidth>
Yes, but you need some marking to recognize the voice traffic.
Precedence is usually used for that.
>
> 3. assume if two voip peers separted by two or three routers , if i
> configure LLQ in both voice routers , what i should do in the intermediate
> routers , do i have to use configure queueing in all the routers along the
> path or use RSVP.
You need QoS all the way from origen to destination, and back.
RSVP is one way of doing it, static config is another. That seems
to me a design issue.
>
> 4. RSVP only for VOIP or it is for also VOFR and VOATM...
VOIP only, AFAIK.
>
> 5. RSVP supported in ethernet interface
Yes. There's a special "feature" called SBM, os Subnetwork Bandwidth
Manager, which is used for RSVP signalling in that case.
>
> 6. do to link dail-peer to request for RSVP .. it is <IP precedence 5> or
> any other command to be used
The precedence is just for "marking" the traffic in order to be
recognized by the routers when using diffserv.
Diffserv, or differenciated service, is when there's no signalling
ahead of traffic and so there is no AC (Admission control).
For RSVP, which is a way of doing intserv or integrated service, you
do signal the requirement. That is configured by default via the
H323-RSVP synchronization. This can be disabled via "no call rsvp sync".
>
> i will be thankful for some input on this .. i am tried of reading in the
> cco
> thanks
> aa
>
-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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