QOS Policy Question

noc-cville · ‎08-06-2012

I have a nested policy for an MPLS connection that supports 4 T1's on the far ends. Below is a copy. My question is this...why when I do a show int f0/0 where the policy is applied does it show the queueing to be FIFO..and although I'm trying to classify and priority queue the Nortel voip traffic, when one of the sites pulls a large file of the server the voip gets stomped on. What am I missing?

policy-map MPLS_T1_POLICY

class BGP_TRAFFIC

bandwidth percent 10

class RECTRAC

bandwidth percent 60

class HIGH_PRIORITY_TRAFFIC

priority percent 15

class class-default

fair-queue 256

random-detect

policy-map T1_BANDWIDTH

class FIRE_E_HIGH_ST

shape average 1536000 192000

service-policy MPLS_T1_POLICY

class FIRE_250

shape average 1536000 192000

service-policy MPLS_T1_POLICY

class WASHINGTON_POOL

shape average 1536000 192000

service-policy MPLS_T1_POLICY

class MEADE_POOL

shape average 1536000 192000

service-policy MPLS_T1_POLICY

FastEthernet0/0 is up, line protocol is up

Hardware is Gt96k FE, address is 0023.5e61.b3ec (bia 0023.5e61.b3ec)

Description: MPLS 60.DATA.106731.1.CFW

Internet address is 10.30.9.2/30

MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 10Mb/s, 100BaseTX/FX

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:17, output 00:00:00, output hang never

Last clearing of "show interface" counters 04:25:37

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 221

Queueing strategy: fifo

Output queue: 0/40 (size/max)

30 second input rate 23000 bits/sec, 12 packets/sec

30 second output rate 71000 bits/sec, 11 packets/sec

325616 packets input, 84566453 bytes

Received 265 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

317992 packets output, 163926131 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

Joseph W. Doherty · ‎08-07-2012

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

As a preliminary guess, your shaper Tc intervals may be too large for VoIP on T1s. Suggest a Tc of 10ms.

What does show policy-map interface reveal?

What's the platform and IOS?

noc-cville · ‎08-07-2012

The platform is an 1841 running Version 12.4(13r)T

Below is the policy-map interface which again, looks correct, but I'm sitll wondering why when I do a show int f0/0 it shows FIFO as the queueing method..

Service-policy output: T1_BANDWIDTH

Class-map: FIRE_E_HIGH_ST (match-any)

11341 packets, 2404865 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name FIRE_E_HIGH_ST

11341 packets, 2404865 bytes

30 second rate 0 bps

Traffic Shaping

Target/Average Byte Sustain Excess Interval Increment

Rate Limit bits/int bits/int (ms) (bytes)

1536000/1536000 48000 192000 192000 125 24000

Adapt Queue Packets Bytes Packets Bytes Shaping

Active Depth Delayed Delayed Active

- 0 11341 2404865 0 0 no

Service-policy : MPLS_T1_POLICY

Class-map: BGP_TRAFFIC (match-all)

0 packets, 0 bytes

--More-- 30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name BGP_TRAFFIC

Queueing

Output Queue: Conversation 265

Bandwidth 10 (%)

Bandwidth 153 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

Class-map: RECTRAC (match-any)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name RECTRAC

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Output Queue: Conversation 266

Bandwidth 60 (%)

Bandwidth 921 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

QoS Set

dscp af41

--More-- Packets marked 0

Class-map: HIGH_PRIORITY_TRAFFIC (match-any)

4281 packets, 343674 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: protocol sip

0 packets, 0 bytes

30 second rate 0 bps

Match: protocol ssh

2081 packets, 208398 bytes

30 second rate 0 bps

Match: access-group name NORTEL_VOIP

2200 packets, 135276 bytes

30 second rate 0 bps

Queueing

Strict Priority

Output Queue: Conversation 264

Bandwidth 15 (%)

Bandwidth 230 (kbps) Burst 5750 (Bytes)

(pkts matched/bytes matched) 0/0

(total drops/bytes drops) 0/0

QoS Set

dscp ef

--More-- Packets marked 4281

Class-map: class-default (match-any)

7060 packets, 2061191 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: any

Queueing

Flow Based Fair Queueing

Maximum Number of Hashed Queues 256

(total queued/total drops/no-buffer drops) 0/0/0

exponential weight: 9

class Transmitted Random drop Tail drop Minimum Maximum Mark

pkts/bytes pkts/bytes pkts/bytes thresh thresh prob

0 7021/2057681 0/0 0/0 20 40 1/10

1 0/0 0/0 0/0 22 40 1/10

2 0/0 0/0 0/0 24 40 1/10

3 0/0 0/0 0/0 26 40 1/10

4 0/0 0/0 0/0 28 40 1/10

5 0/0 0/0 0/0 30 40 1/10

6 39/3510 0/0 0/0 32 40 1/10

7 0/0 0/0 0/0 34 40 1/10

rsvp 0/0 0/0 0/0 36 40 1/10

--More--

Class-map: FIRE_250 (match-any)

85273 packets, 58906232 bytes

30 second offered rate 1000 bps, drop rate 0 bps

Match: access-group name FIRE_250

85273 packets, 58906232 bytes

30 second rate 1000 bps

Traffic Shaping

Target/Average Byte Sustain Excess Interval Increment

Rate Limit bits/int bits/int (ms) (bytes)

1536000/1536000 48000 192000 192000 125 24000

Adapt Queue Packets Bytes Packets Bytes Shaping

Active Depth Delayed Delayed Active

- 0 84677 58463171 16804 14244365 no

Service-policy : MPLS_T1_POLICY

Class-map: BGP_TRAFFIC (match-all)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name BGP_TRAFFIC

--More-- Queueing

Output Queue: Conversation 265

Bandwidth 10 (%)

Bandwidth 153 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

Class-map: RECTRAC (match-any)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name RECTRAC

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Output Queue: Conversation 266

Bandwidth 60 (%)

Bandwidth 921 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

QoS Set

dscp af41

Packets marked 0

--More-- Class-map: HIGH_PRIORITY_TRAFFIC (match-any)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: protocol sip

0 packets, 0 bytes

30 second rate 0 bps

Match: protocol ssh

0 packets, 0 bytes

30 second rate 0 bps

Match: access-group name NORTEL_VOIP

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Strict Priority

Output Queue: Conversation 264

Bandwidth 15 (%)

Bandwidth 230 (kbps) Burst 5750 (Bytes)

(pkts matched/bytes matched) 0/0

(total drops/bytes drops) 0/0

QoS Set

dscp ef

Packets marked 0

--More-- Class-map: class-default (match-any)

85273 packets, 58906232 bytes

30 second offered rate 1000 bps, drop rate 0 bps

Match: any

Queueing

Flow Based Fair Queueing

Maximum Number of Hashed Queues 256

(total queued/total drops/no-buffer drops) 0/596/0

exponential weight: 9

class Transmitted Random drop Tail drop Minimum Maximum Mark

pkts/bytes pkts/bytes pkts/bytes thresh thresh prob

0 84449/58437023 248/183550 348/259511 20 40 1/10

1 0/0 0/0 0/0 22 40 1/10

2 228/26148 0/0 0/0 24 40 1/10

3 0/0 0/0 0/0 26 40 1/10

4 0/0 0/0 0/0 28 40 1/10

5 0/0 0/0 0/0 30 40 1/10

6 0/0 0/0 0/0 32 40 1/10

7 0/0 0/0 0/0 34 40 1/10

rsvp 0/0 0/0 0/0 36 40 1/10

--More-- Class-map: WASHINGTON_POOL (match-all)

31527 packets, 22233998 bytes

30 second offered rate 4000 bps, drop rate 0 bps

Match: access-group name WASHINGTON_POOL

Traffic Shaping

Target/Average Byte Sustain Excess Interval Increment

Rate Limit bits/int bits/int (ms) (bytes)

1536000/1536000 48000 192000 192000 125 24000

Adapt Queue Packets Bytes Packets Bytes Shaping

Active Depth Delayed Delayed Active

- 0 31527 22233998 1059 1427629 no

Service-policy : MPLS_T1_POLICY

Class-map: BGP_TRAFFIC (match-all)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name BGP_TRAFFIC

Queueing

Output Queue: Conversation 265

Bandwidth 10 (%)

Bandwidth 153 (kbps)Max Threshold 64 (packets)

--More-- (pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

Class-map: RECTRAC (match-any)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name RECTRAC

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Output Queue: Conversation 266

Bandwidth 60 (%)

Bandwidth 921 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

QoS Set

dscp af41

Packets marked 0

Class-map: HIGH_PRIORITY_TRAFFIC (match-any)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: protocol sip

--More-- 0 packets, 0 bytes

30 second rate 0 bps

Match: protocol ssh

0 packets, 0 bytes

30 second rate 0 bps

Match: access-group name NORTEL_VOIP

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Strict Priority

Output Queue: Conversation 264

Bandwidth 15 (%)

Bandwidth 230 (kbps) Burst 5750 (Bytes)

(pkts matched/bytes matched) 0/0

(total drops/bytes drops) 0/0

QoS Set

dscp ef

Packets marked 0

Class-map: class-default (match-any)

31527 packets, 22233998 bytes

30 second offered rate 4000 bps, drop rate 0 bps

Match: any

--More-- Queueing

Flow Based Fair Queueing

Maximum Number of Hashed Queues 256

(total queued/total drops/no-buffer drops) 0/0/0

exponential weight: 9

class Transmitted Random drop Tail drop Minimum Maximum Mark

pkts/bytes pkts/bytes pkts/bytes thresh thresh prob

0 31471/22228958 0/0 0/0 20 40 1/10

1 0/0 0/0 0/0 22 40 1/10

2 0/0 0/0 0/0 24 40 1/10

3 0/0 0/0 0/0 26 40 1/10

4 0/0 0/0 0/0 28 40 1/10

5 0/0 0/0 0/0 30 40 1/10

6 56/5040 0/0 0/0 32 40 1/10

7 0/0 0/0 0/0 34 40 1/10

rsvp 0/0 0/0 0/0 36 40 1/10

Class-map: MEADE_POOL (match-all)

61198 packets, 23353892 bytes

30 second offered rate 11000 bps, drop rate 0 bps

Match: access-group name MEADE_POOL

--More-- Traffic Shaping

Target/Average Byte Sustain Excess Interval Increment

Rate Limit bits/int bits/int (ms) (bytes)

1536000/1536000 48000 192000 192000 125 24000

Adapt Queue Packets Bytes Packets Bytes Shaping

Active Depth Delayed Delayed Active

- 0 61198 23353892 0 0 no

Service-policy : MPLS_T1_POLICY

Class-map: BGP_TRAFFIC (match-all)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name BGP_TRAFFIC

Queueing

Output Queue: Conversation 265

Bandwidth 10 (%)

Bandwidth 153 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

Class-map: RECTRAC (match-any)

--More-- 0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: access-group name RECTRAC

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Output Queue: Conversation 266

Bandwidth 60 (%)

Bandwidth 921 (kbps)Max Threshold 64 (packets)

(pkts matched/bytes matched) 0/0

(depth/total drops/no-buffer drops) 0/0/0

QoS Set

dscp af41

Packets marked 0

Class-map: HIGH_PRIORITY_TRAFFIC (match-any)

0 packets, 0 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: protocol sip

0 packets, 0 bytes

30 second rate 0 bps

Match: protocol ssh

0 packets, 0 bytes

--More-- 30 second rate 0 bps

Match: access-group name NORTEL_VOIP

0 packets, 0 bytes

30 second rate 0 bps

Queueing

Strict Priority

Output Queue: Conversation 264

Bandwidth 15 (%)

Bandwidth 230 (kbps) Burst 5750 (Bytes)

(pkts matched/bytes matched) 0/0

(total drops/bytes drops) 0/0

QoS Set

dscp ef

Packets marked 0

Class-map: class-default (match-any)

61198 packets, 23353892 bytes

30 second offered rate 11000 bps, drop rate 0 bps

Match: any

Queueing

Flow Based Fair Queueing

Maximum Number of Hashed Queues 256

(total queued/total drops/no-buffer drops) 0/0/0

--More-- exponential weight: 9

class Transmitted Random drop Tail drop Minimum Maximum Mark

pkts/bytes pkts/bytes pkts/bytes thresh thresh prob

0 61096/23344712 0/0 0/0 20 40 1/10

1 0/0 0/0 0/0 22 40 1/10

2 0/0 0/0 0/0 24 40 1/10

3 0/0 0/0 0/0 26 40 1/10

4 0/0 0/0 0/0 28 40 1/10

5 0/0 0/0 0/0 30 40 1/10

6 102/9180 0/0 0/0 32 40 1/10

7 0/0 0/0 0/0 34 40 1/10

rsvp 0/0 0/0 0/0 36 40 1/10

Class-map: class-default (match-any)

5847 packets, 612635 bytes

30 second offered rate 0 bps, drop rate 0 bps

Match: any

Joseph W. Doherty · ‎08-07-2012

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

Your Tc is 125ms, likely too excessive for VoIP.

Try: shape average 1536000 1920

Why do you have SSH in your LLQ?

noc-cville · ‎08-07-2012

Ok, I will try changing the settings as suggested. SSH was put in there to guarantee management access to the router and switch onsite during times of congestion. Should it not be?

Joseph W. Doherty · ‎08-07-2012

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

Mark Sargent wrote:

Ok, I will try changing the settings as suggested. SSH was put in there to guarantee management access to the router and switch onsite during times of congestion. Should it not be?

I would recommend SSH not be in LLQ.