QoS

A network engineer runs the following command on Router R1:

R1# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy output: QOS_POLICY

Class-map: VOICE (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 police cir 1000000 bc 15625 be 15625 conformed 0 packets, 0 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: class-default (match-any) 100 packets, 10000 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Queueing queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 100/10000

Based on this output, what can be concluded?

A network engineer runs the following command on Router R2:

R2# show class-map

Class Map match-any VOICE (id 1) Match ip dscp ef (46) Class Map match-any DATA (id 2) Match ip dscp af31 (26) Class Map match-any class-default (id 0) Match any

R2# show policy-map

Policy Map QOS_POLICY Class VOICE priority level 1 police cir 1000000 bc 15625 be 15625 Class DATA bandwidth remaining percent 50 Class class-default bandwidth remaining percent 50

R2# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy output: QOS_POLICY

Class-map: VOICE (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing strict priority queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 police cir 1000000 bc 15625 be 15625 conformed 0 packets, 0 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: DATA (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp af31 (26) Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 bandwidth remaining percent 50 (0 kbps)

Class-map: class-default (match-any) 100 packets, 10000 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 100/10000 bandwidth remaining percent 50 (0 kbps)

Based on this output, what can be concluded?

A network engineer runs the following command on Router R3:

R3# show mls qos interface GigabitEthernet0/1

GigabitEthernet0/1 trust state: trust DSCP trust mode: trust dscp COS override: dis default COS: 0 DSCP Mutation Map: default dscp mutation map trust device: none qos mode: port-based

R3# show mls qos

QoS is enabled globally QoS global counters: total packets not matching QoS criteria = 0 Total packets with known CoS = 0 Total packets dropped by policing = 0

Based on this output, what can be concluded?

A network engineer runs the following command on Router R4:

R4# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy input: SHAPE_POLICY

Class-map: class-default (match-any) 1000 packets, 100000 bytes 5 minute offered rate 100000 bps, drop rate 0 bps Match: any Queueing shape (average) cir 500000, bc 5000, be 5000 target shape rate 500000

Based on this output, what can be concluded?

A network engineer runs the following command on Router R5:

R5# show queueing interface GigabitEthernet0/1
 Interface GigabitEthernet0/1 queueing strategy:  weighted fair

Queueing on output: Weighted Fair Queueing Current fair queue configuration: Number of queues: 256 Dynamic queues: 256 Reserved queues: 0 Current WFQ global configuration: Total dynamic queues: 256 Total reserved queues: 0 Class based weighted fair queueing: enabled Queueing on input: FIFO

Based on this output, what can be concluded?

A network engineer runs the following command on Router R6:

R6# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy output: QOS_POLICY

Class-map: VOICE (match-any) 500 packets, 50000 bytes 5 minute offered rate 50000 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing strict priority queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 500/50000 police cir 1000000 bc 15625 be 15625 conformed 500 packets, 50000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: DATA (match-any) 1000 packets, 100000 bytes 5 minute offered rate 100000 bps, drop rate 0 bps Match: ip dscp af31 (26) Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 1000/100000 bandwidth remaining percent 50

Class-map: class-default (match-any) 2000 packets, 200000 bytes 5 minute offered rate 200000 bps, drop rate 0 bps Match: any Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 2000/200000 bandwidth remaining percent 50

Based on this output, what can be concluded?

A network engineer runs the following command on Router R7:

R7# show mls qos interface GigabitEthernet0/1 statistics

GigabitEthernet0/1 Ingress statistics: dscp: incoming no_change classified policed dropped default: 0 0 0 0 0 ef: 100 100 100 0 0 af31: 200 200 200 0 0 other: 300 300 300 0 0

Egress statistics: dscp: queued dropped default: 0 0 ef: 100 0 af31: 200 0 other: 300 0

Based on this output, what can be concluded?

A network engineer runs the following command on Router R8:

R8# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy output: QOS_POLICY

Class-map: VOICE (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing strict priority queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 police cir 1000000 bc 15625 be 15625 conformed 0 packets, 0 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: DATA (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp af31 (26) Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 bandwidth remaining percent 50

Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 bandwidth remaining percent 50

Based on this output, what can be concluded?

A network engineer runs the following command on Router R9:

R9# show queueing interface GigabitEthernet0/1
 Interface GigabitEthernet0/1 queueing strategy:  class-based weighted fair

Queueing on output: Class-based Weighted Fair Queueing Queueing on input: FIFO

R9# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy output: QOS_POLICY

Class-map: VOICE (match-any) 100 packets, 10000 bytes 5 minute offered rate 10000 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing strict priority queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 100/10000 police cir 1000000 bc 15625 be 15625 conformed 100 packets, 10000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: DATA (match-any) 200 packets, 20000 bytes 5 minute offered rate 20000 bps, drop rate 0 bps Match: ip dscp af31 (26) Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 200/20000 bandwidth remaining percent 50

Class-map: class-default (match-any) 300 packets, 30000 bytes 5 minute offered rate 30000 bps, drop rate 0 bps Match: any Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 300/30000 bandwidth remaining percent 50

Based on this output, what can be concluded?

Examine the following configuration snippet on a Cisco IOS-XE router:

interface GigabitEthernet0/1

service-policy output QOS_POLICY

policy-map QOS_POLICY

class VOICE

priority percent 10

class VIDEO

bandwidth percent 30

class class-default

fair-queue

What is the effect of this configuration?

Consider the following configuration on a Cisco router:

class-map match-any CRITICAL_DATA match ip dscp af21 af22 af23

policy-map QOS

class CRITICAL_DATA

bandwidth remaining percent 50

class class-default

fair-queue

interface GigabitEthernet0/0

service-policy output QOS

Which statement about this configuration is true?

Given the following configuration on a Cisco IOS router:

policy-map SHAPE

class class-default

shape average 1000000

interface Serial0/0/0

service-policy output SHAPE

What is the effect of this configuration?

Examine the following configuration:

policy-map MARKING

class VOICE

set dscp ef

class VIDEO

set dscp af41

class class-default

set dscp default

interface GigabitEthernet0/0

service-policy input MARKING

Which statement is true?

Consider the following configuration:

class-map match-all HTTP match protocol http

policy-map QOS

class HTTP

police 2000000 1500 3000 conform-action transmit exceed-action drop

interface GigabitEthernet0/1

service-policy input QOS

What is the effect of this configuration?

Examine the following configuration:

policy-map QUEUE

class GOLD

bandwidth percent 25 queue-limit 64 packets

class SILVER

bandwidth percent 25 queue-limit 128 packets

class class-default

fair-queue

interface GigabitEthernet0/2

service-policy output QUEUE

Which statement about this configuration is true?