From: Pavel Bykov (slidersv@gmail.com)
Date: Mon Mar 30 2009 - 18:13:45 ART
With QoS you need to think about what QoS does and then it will be obvious
as to where it can or cannot be applied.
QoS works with software queue, the buffers allocated to an interface. When
congested packet cannot be sent, it is stored in those buffers, same as the
packets that are over shaping threshold. Then the rearranging based on set
queuing can take place. So as long as your policy map will govern that same
buffer space - functionality should not differ.
But as a side note, you can use FRF.12 by setting maximum fragment size. I
believe it's 1600 bytes, so you will not actually fragment any packet, but
it will create an additional interim queuing system for fast voice
passthrough even when shaper's gate is closed. Therefore voice can be
improved. Not too much on 4Mbps, but still given the chance...
2009/3/29 nowy1981 <freemaxis@gmail.com>
> nowy1981 pisze:
>
> Sorry guys, it should be two examples
>
>
> Example 1
>
> interface Serial1/0.102 point-to-point
> ip address 10.0.0.1 255.255.255.0
> frame-relay interface-dlci 102
> class DLCI-102
>
> Example 2
>
> interface Serial1/0.102 point-to-point
> ip address 10.0.0.1 255.255.255.0
> service-policy output FRTS
> frame-relay interface-dlci 102
>
> Hi GS
>>
>> I have following MQC FRTS+LLQ+CBWFQ. I would shape PVC 102 to 15 Mbps +
>> give priority for EF up to 1 Mbps and guarantee for example 10 Mbps for
>> SMTP.
>> I see that I can apply it to the subinterface on three ways and the output
>> of the show policy-map interface s1/0.102 is the same at each time.
>> Question: I need to confirm. Will it work in the same way?
>>
>> class-map match-all SMTP
>> match protocol smtp
>> class-map match-all VOICE
>> match ip dscp ef
>> !
>>
>> policy-map LLQ+CBWFQ
>> class VOICE
>> priority 1000
>> class SMTP
>> bandwidth 10000
>> policy-map FRTS
>> class class-default
>> shape average 15000000 150000
>> shape adaptive 11000000
>> shape fecn-adapt
>> service-policy LLQ+CBWFQ
>>
>> map-class frame-relay DLCI-102
>> service-policy output FRTS
>>
>>
>> R1#show policy-map interface s1/0.102
>>
>> Serial1/0.102
>>
>> Service-policy output: FRTS
>>
>> Class-map: class-default (match-any)
>> 0 packets, 0 bytes
>> 5 minute offered rate 0 bps, drop rate 0 bps
>> Match: any
>> Traffic Shaping
>> Target/Average Byte Sustain Excess Interval Increment
>> Rate Limit bits/int bits/int (ms) (bytes)
>> 15000000/15000000 37500 150000 150000 10 18750
>>
>> Adapt Queue Packets Bytes Packets Bytes Shaping
>> Active Depth Delayed Delayed Active
>> - 0 0 0 0 0 no
>>
>> Service-policy : LLQ+CBWFQ
>>
>> Class-map: VOICE (match-all)
>> 0 packets, 0 bytes
>> 5 minute offered rate 0 bps, drop rate 0 bps
>> Match: ip dscp ef (46)
>> Queueing
>> Strict Priority
>> Output Queue: Conversation 264
>> Bandwidth 1000 (kbps) Burst 25000 (Bytes)
>> (pkts matched/bytes matched) 0/0
>> (total drops/bytes drops) 0/0
>>
>> Class-map: SMTP (match-all)
>> 0 packets, 0 bytes
>> 5 minute offered rate 0 bps, drop rate 0 bps
>> Match: protocol smtp
>> Queueing
>> Output Queue: Conversation 265
>> Bandwidth 10000 (kbps) Max Threshold 64 (packets)
>> (pkts matched/bytes matched) 0/0
>> (depth/total drops/no-buffer drops) 0/0/0
>>
>> Class-map: class-default (match-any)
>> 0 packets, 0 bytes
>> 5 minute offered rate 0 bps, drop rate 0 bps
>> Match: any
>>
>> Example 1
>>
>> interface Serial1/0.102 point-to-point
>> ip address 10.0.0.1 255.255.255.0
>> frame-relay interface-dlci 102
>> class DLCI-102
>>
>> Example 2
>>
>> interface Serial1/0.102 point-to-point
>> ip address 10.0.0.1 255.255.255.0
>> service-policy output FRTS
>> frame-relay interface-dlci 102
>>
>> Exaxmple 3
>>
>> interface Serial1/0.102 point-to-point
>> ip address 10.0.0.1 255.255.255.0
>> frame-relay interface-dlci 102
>> service-policy output FRTS
>>
>>
>> Thanks
>>
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>
-- Pavel Bykov ---------------- Don't forget to help stopping the braindumps, use of which reduces value of your certifications. Sign the petition at http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Mon Apr 06 2009 - 06:44:08 ART