From: mihai (mihai@ngnpath.com)
Date: Wed May 30 2007 - 21:58:13 ART
Going further I added two more routers R1 - R5 - R3 - R6 - R4
Traffic generator on R5, test ping from R1 to R4, link between R3 and R6
100% usage.
Just plain and simple priority command for icmp traffic and I would like
to see same RTT time from ping with that serial link flooded.
Is this how u guys would practice QoS commands?
Bandwidth command seems to be working ... shape average command seems to
be working ... I got stuck with this priority :))
I mean all it looks nice in the workbooks but I would like to see it
working live on my 26xx routers.
Let me know even if this question of mine is the most stupid question
asked :))) ... I'll take the heat!
Thx for your time,
Mihai
mihai wrote:
> Here is what I can see on R3 and is similar to all the routers involved
> in this small test.
>
> r3#sh access-lists
> Extended IP access list 100
> 10 permit icmp any any echo (65 matches)
> 20 permit icmp any any echo-reply (40 matches)
> r3#
>
> Before flooding the s1/3:
>
> r5#ping 6.6.6.6
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 6.6.6.6, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 28/31/32 ms
> r5#
>
> Flooding started:
>
> r3#sh int s1/3
> Serial1/3 is up, line protocol is up
> Hardware is CD2430 in sync mode
> Internet address is 155.1.36.3/24
> MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
> reliability 255/255, txload 255/255, rxload 239/255
> Encapsulation HDLC, loopback not set
> Keepalive set (10 sec)
> Last input 00:00:00, output 00:00:00, output hang never
> Last clearing of "show interface" counters 00:01:26
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: Class-based queueing
> Output queue: 7/1000/64/0 (size/max total/threshold/drops)
> Conversations 3/8/16 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> Available Bandwidth 28 kilobits/sec
> 30 second input rate 60000 bits/sec, 15 packets/sec
> 30 second output rate 64000 bits/sec, 16 packets/sec
> 1288 packets input, 661412 bytes, 0 no buffer
> Received 11 broadcasts, 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> 1406 packets output, 696106 bytes, 0 underruns
> 0 output errors, 0 collisions, 0 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 0 carrier transitions
> DCD=up DSR=up DTR=up RTS=up CTS=up
> r3#
>
>
> r3#sh policy-map int s1/3
> Serial1/3
>
> Service-policy output: p-icmp
>
> Class-map: icmp (match-all)
> 59 packets, 6136 bytes
> 30 second offered rate 2000 bps, drop rate 0 bps
> Match: access-group 100
> Queueing
> Strict Priority
> Output Queue: Conversation 24
> Bandwidth 20 (kbps) Burst 500 (Bytes)
> (pkts matched/bytes matched) 59/6136
> (total drops/bytes drops) 0/0
>
> Class-map: class-default (match-any)
> 3040 packets, 1510159 bytes
> 30 second offered rate 69000 bps, drop rate 3000 bps
> Match: any
> r3#sh policy-map int s1/3
> Serial1/3
>
> Service-policy output: p-icmp
>
> Class-map: icmp (match-all)
> 74 packets, 7696 bytes
> 30 second offered rate 2000 bps, drop rate 0 bps
> Match: access-group 100
> Queueing
> Strict Priority
> Output Queue: Conversation 24
> Bandwidth 20 (kbps) Burst 500 (Bytes)
> (pkts matched/bytes matched) 74/7696
> (total drops/bytes drops) 0/0
>
> Class-map: class-default (match-any)
> 3098 packets, 1539943 bytes
> 30 second offered rate 69000 bps, drop rate 3000 bps
> Match: any
> r3#
>
> r3#sh access-lists
> Extended IP access list 100
> 10 permit icmp any any echo (185 matches)
> 20 permit icmp any any echo-reply (175 matches)
> r3#
>
>
> Tarun Pahuja wrote:
>> Mihai,
>> What does the show output of Policy-Map say, do you see any
>> packets being matched and being put in the prority queue?
>>
>> Thanks,
>> Tarun
>>
>>
>>
>>
>> On 5/29/07, mihai <mihai@ngnpath.com> wrote:
>>> Hi all,
>>>
>>> Not sure what's going on ...
>>> Here is what I have:
>>>
>>> R5 --Eth--R3--Serial with clock rate 64k--R6
>>>
>>> IP connectivity ok and ping from R5 to R6 ~ 6x ms
>>> Start rtr on R5 to bring the serial between R3 and R6 to 100% usage.
>>> Ping from R5 to R6 ~ 800 ms
>>>
>>> I would like to test priority command with MQC for ping traffic (icmp)
>>> My expectation is to get RTT around 6x ms with priority command in
>>> place.
>>>
>>> This is not happening ... and I can't figure out what I'm doing wrong.
>>>
>>> MQC related config:
>>>
>>> class-map match-all t1
>>> match access-group 100
>>> !
>>> policy-map p-t1
>>> class t1
>>> priority 16
>>>
>>> access-list 100 permit icmp any any echo
>>> access-list 100 permit icmp any any echo-reply
>>>
>>> Service policy output p-t1 on R5,R3 and R6.
>>>
>>> Any idea what's wrong with this test of mine?
>>> Thx.
>>>
>>> Mihai
>>>
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