01-24-2012 12:14 AM - edited 03-04-2019 03:00 PM
Hello!
The following part of policy-map shows there are dropped packet in class ( WAN_DSCP_CS1 drop rate 3000 bps )
The actually rate is lowest as target shape rate and the no-buffer drops counter is zero!
The full config contains appr. 100 branch-class and every branch-class call the WAN_OUTPUT_V.1 policy.
We applied the service-policy on GigabitEthernet 0/3.
The hardware is 7206VXR-G1 the softver is 12.4.20.T advanced ip services
How it is possible to find it how the router throws away the packets why?
Class-map: debrecen (match-any)
6100639 packets, 2386603748 bytes
30 second offered rate 1179000 bps, drop rate 3000 bps
Match: access-group name debrecen
6100639 packets, 2386603748 bytes
30 second rate 1179000 bps
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/26308/0
(pkts output/bytes output) 3024421/1270775183
shape (average) cir 1900000, bc 7600, be 7600
target shape rate 1900000
Service-policy : WAN-OUTPUT-V.1
queue stats for all priority classes:
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 661602/88789612
Class-map: WAN_DSCP_EF (match-all)
1323206 packets, 143171814 bytes
30 second offered rate 2000 bps, drop rate 0 bps
Match: ip dscp ef (46)
Priority: 17% (323 kbps), burst bytes 8050, b/w exceed drops: 0
QoS Set
cos 5
Packets marked 661602
Class-map: WAN_DSCP_CS3 (match-any)
16294 packets, 8056869 bytes
30 second offered rate 0 bps, drop rate 0 bps
Match: ip dscp cs3 (24)
0 packets, 0 bytes
30 second rate 0 bps
Match: ip dscp af41 (34)
0 packets, 0 bytes
30 second rate 0 bps
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 8147/4249838
bandwidth 3% (57 kbps)
Class-map: WAN_DSCP_CS1 (match-any)
1244538 packets, 279892316 bytes
30 second offered rate 109000 bps, drop rate 3000 bps
Match: ip dscp cs1 (8)
0 packets, 0 bytes
30 second rate 0 bps
Match: protocol eigrp
0 packets, 0 bytes
30 second rate 0 bps
Queueing
queue limit 128 packets
(queue depth/total drops/no-buffer drops) 0/26308/0
(pkts output/bytes output) 596188/153156045
bandwidth 40% (760 kbps)
------------------------------------------------
------------------------------------------------
GigabitEthernet0/3 is up, line protocol is up
Hardware is MV64460 Internal MAC, address is 0019.56b2.c419 (bia 0019.56b2.c419)
Description: INTERLINK Multiflex
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 2/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 19:18:51
Input queue: 0/300/669/0 (size/max/drops/flushes); Total output drops: 275049
Queueing strategy: Class-based queueing
Output queue: 102/1500/0 (size/max total/drops)
30 second input rate 5518000 bits/sec, 3183 packets/sec
30 second output rate 9701000 bits/sec, 3662 packets/sec
120693102 packets input, 4292419309 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored
0 watchdog, 19340047 multicast, 0 pause input
0 input packets with dribble condition detected
128241462 packets output, 4017681995 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
01-24-2012 02:56 AM
Sorry the hardver is 7206VXR-G2 !!
01-24-2012 07:10 AM
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Posting
Might be insufficient queue space for bursts.
01-25-2012 12:43 AM
The no-buffer drops is zero!
How can i check the queue space?
01-25-2012 02:11 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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Posting
KAROLY KOHEGYI wrote:
The no-buffer drops is zero!
How can i check the queue space?
If I remember correctly, no-buffer drops being zero just means you did not run out of physical buffer space. The drops you're seeing, I believe, are you're just hitting your logical queue depths. The queue limits are what might be increased.
01-25-2012 02:53 AM
The queue-depth is zero also!
it is confuse!
01-25-2012 07:06 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
KAROLY KOHEGYI wrote:
The queue-depth is zero also!
it is confuse!
Queue-depth is number of packets in queue at time of snapshot - not uncommon to get drops and not "catch" packets in queue in cases of transient bursts.
01-25-2012 03:20 AM
Hi,
Here is the newest confuse issue!
The offered rate is higher than shap rate and no drops ! (close to shape peak !!! )
sho policy-map interface output class pecs
GigabitEthernet0/1
GigabitEthernet0/3
Service-policy output: MF
Class-map: pecs (match-any)
46762967 packets, 21107524803 bytes
30 second offered rate 3665000 bps, drop rate 0 bps
Match: access-group name pecs
46762968 packets, 21107524681 bytes
30 second rate 3665000 bps
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 166/155121/0
(pkts output/bytes output) 23505715/11060330966
shape (average) cir 1900000, bc 7600, be 7600
target shape rate 1900000
Service-policy : WAN-OUTPUT-V.1
queue stats for all priority classes:
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 3019213/402263119
Class-map: WAN_DSCP_EF (match-all)
6027535 packets, 646795939 bytes
30 second offered rate 43000 bps, drop rate 0 bps
Match: ip dscp ef (46)
Priority: 17% (323 kbps), burst bytes 8050, b/w exceed drops: 0
QoS Set
cos 5
Packets marked 3019213
Class-map: WAN_DSCP_CS3 (match-any)
81716 packets, 73702102 bytes
30 second offered rate 4000 bps, drop rate 0 bps
Match: ip dscp cs3 (24)
0 packets, 0 bytes
30 second rate 0 bps
Match: ip dscp af41 (34)
0 packets, 0 bytes
30 second rate 0 bps
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/83/0
(pkts output/bytes output) 40779/37813432
bandwidth 3% (57 kbps)
Class-map: WAN_DSCP_CS1 (match-any)
2480434 packets, 382699335 bytes
30 second offered rate 2000 bps, drop rate 0 bps
Match: ip dscp cs1 (8)
0 packets, 0 bytes
30 second rate 0 bps
Match: protocol eigrp
0 packets, 0 bytes
30 second rate 0 bps
Queueing
queue limit 128 packets
(queue depth/total drops/no-buffer drops) 0/33688/0
(pkts output/bytes output) 1345706/227547725
bandwidth 40% (760 kbps)
Class-map: WAN_DSCP_CS2 (match-all)
512708 packets, 73151425 bytes
30 second offered rate 2000 bps, drop rate 0 bps
Match: ip dscp cs2 (16)
Queueing
queue limit 128 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 256354/43483468
bandwidth 15% (285 kbps)
Class-map: WAN_DSCP_AF11 (match-all)
20029430 packets, 2618963100 bytes
30 second offered rate 166000 bps, drop rate 0 bps
Match: ip dscp af11 (10)
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/1929/0
(pkts output/bytes output) 10117875/1580628559
bandwidth 5% (95 kbps)
Class-map: class-default (match-any)
17631141 packets, 17312212798 bytes
30 second offered rate 3448000 bps, drop rate 0 bps
Match: any
Queueing
queue limit 256 packets
(queue depth/total drops/no-buffer drops) 165/119421/0
(pkts output/bytes output) 8725788/8768594663
bandwidth 20% (380 kbps)
01-24-2012 09:31 AM
Can you please try increasing the BC and BE values after your shape command?
01-24-2012 10:05 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
An interesting suggestion. Newer IOS seem to default to a 4 ms Tc rather than 25 ms Tc. What you thinking for Tc, maybe 10 ms (19,000 Bc)?
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