The modular Quality of service CLI (MQC) to help
by defining a common set of configuration commands to configure
many QOS features in a router or switch.
MQC separates the classification function of
a QOS tool from the action (PHB) that the QOS tool wants to
perform. To do so, there are three major commands with MQC, with several
subordinate commands:
What is Quality of Service (QOS)?
What is Modular Quality of service CLI (MQC)?
What is Classification and marking? What are IP Precedence and DSCP Values? What is AF and EF?
What is of NBAR (network- based application recognition), classification QOS How to configure NBAR?
Class maps
What traffic do we
really care about ?
Each class is
identified using a class map
A traffic
class contain three major elements:
- A
case-sensitive name
- A
series of match command
- An
instruction on how to evaluate the match command if more than one match command
exists in the traffic class
Class maps can operate in two modes:
- Match
all: all conditions have to succeed.
- Match
any: at least one condition must succeed.
- The
default mode is match all.
R1(config-cmap)#
Policy maps
What will
be done to this traffic?
Define a
traffic policy, which configures the QOS features associated
with traffic class
previously identified using a class map.
A traffic
policy contains three major elements:
- A
case-sensitive name
- A
traffic class
- The QOS policy
associate with that traffic class
Up to 256 traffic classes can be associated with a single
traffic policy.
Multiple policy maps can be nested to influence the sequence
of QOS actions.
Service policy
Where will this policy be implemented?
Attaches a traffic policy configured with a policy map an
interface.
Service polices can be applied to an interface for inbound
or outbound packets.
R1(config-pmap-c)#
Service policy
Where will this policy be implemented?
Attaches a traffic policy configured with a policy map an
interface.
Service polices can be applied to an interface for inbound
or outbound packets.
\
let see the configuration:
Topology:
TASK:
- configure the topology as per the diagram
- Assign IP addresses as per the diagram
- configure OSPF and advertise all the directly connected interfaces
- configure MQC policy on router 1 serial 3/2
- traffic flows for ICMP between Router 1 and Router 3 serial 3/2 network (10.1.1.1 to 30.1.1.1) should be guaranteed 130 kbps.assign 70 kbps to HTTP traffic.
R1#show ip interface brief
Interface
IP-Address OK? Method
Status
Protocol
FastEthernet0/0
10.1.1.1 YES manual
up
up
Serial3/0
1.1.1.1
YES manual
up
up
Serial3/2
3.3.3.2
YES manual
up
up
R2#show ip interface brief
Interface
IP-Address OK? Method
Status
Protocol
FastEthernet0/0
20.1.1.1 YES manual
up
up
Serial3/0
1.1.1.2
YES manual
up
up
Serial3/1
2.2.2.1
YES manual
up
up
R3#show ip interface brief
Interface
IP-Address OK? Method
Status
Protocol
FastEthernet0/0
30.1.1.1 YES manual
up
up
Serial3/1
2.2.2.2 YES manual
up
up
Serial3/2
3.3.3.1 YES manual
up
up
R1(config)#router ospf 1
R1(config-router)#network 10.0.0.0 0.255.255.255 area 0
R1(config-router)#network 1.0.0.0 0.255.255.255 area 0
R1(config-router)#network 3.0.0.0 0.255.255.255 area 0
R1(config-router)#exit
*Jan 5 23:40:32.179: %OSPF-5-ADJCHG: Process 1, Nbr
20.1.1.1 on Serial3/0 from LOADING to FULL, Loading Done
R2(config)#router ospf 1
R2(config-router)#network 20.0.0.0 0.255.255.255 area 0
R2(config-router)#network 2.0.0.0 0.255.255.255 area 0
R2(config-router)#network 1.0.0.0 0.255.255.255 area 0
R2(config-router)#exit
*Jan 5 23:40:31.891: %OSPF-5-ADJCHG: Process 1, Nbr
10.1.1.1 on Serial3/0 from LOADING to FULL, Loading Done
*Jan 5 23:41:07.539: %OSPF-5-ADJCHG: Process 1, Nbr
30.1.1.1 on Serial3/1 from LOADING to FULL, Loading Done
R3(config)#router ospf 1
R3(config-router)#network 30.0.0.0 0.255.255.255 area 0
R3(config-router)#network 3.0.0.0 0.255.255.255 area 0
R3(config-router)#network 2.0.0.0 0.255.255.255 area 0
R3(config-router)#exit
*Jan 5 23:41:07.835: %OSPF-5-ADJCHG: Process 1, Nbr
20.1.1.1 on Serial3/1 from LOADING to FULL, Loading Done
*Jan 6 00:21:31.051: %OSPF-5-ADJCHG: Process 1, Nbr
10.1.1.1 on Serial3/2 from LOADING to FULL, Loading Done
R1#show ip pro
*** IP Routing is NSF aware ***
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not
set
Incoming update filter list for all interfaces is not
set
Router ID 10.1.1.1
Number of areas in this router is 1. 1 normal 0 stub
0 nssa
Maximum path: 4
Routing for Networks:
1.0.0.0 0.255.255.255 area 0
3.0.0.0 0.255.255.255 area 0
10.0.0.0 0.255.255.255 area 0
Routing Information Sources:
Gateway
Distance Last Update
20.1.1.1
110 00:01:29
30.1.1.1
110 00:00:43
Distance: (default is 110)
R1#show ip route ospf
Gateway of last resort is not set
O 2.0.0.0/8 [110/128] via 1.1.1.2,
00:01:40, Serial3/0
O 20.0.0.0/8 [110/65] via 1.1.1.2,
00:01:40, Serial3/0
· 30.0.0.0/8
[110/129] via 1.1.1.2, 00:00:55, Serial3/0
R2#show ip pro
*** IP Routing is NSF aware ***
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not
set
Incoming update filter list for all interfaces is not
set
Router ID 20.1.1.1
Number of areas in this router is 1. 1 normal 0 stub
0 nssa
Maximum path: 4
Routing for Networks:
1.0.0.0 0.255.255.255 area 0
2.0.0.0 0.255.255.255 area 0
20.0.0.0 0.255.255.255 area 0
Routing Information Sources:
Gateway
Distance Last Update
10.1.1.1
110 00:02:02
30.1.1.1
110 00:01:25
Distance: (default is 110)
R2#show ip route ospf
Gateway of last resort is not set
O 3.0.0.0/8 [110/128] via 1.1.1.1,
00:02:09, Serial3/0
O 10.0.0.0/8 [110/65] via 1.1.1.1,
00:02:09, Serial3/0
· 30.0.0.0/8
[110/65] via 2.2.2.2, 00:01:31, Serial3/1
R3#show ip pro
*** IP Routing is NSF aware ***
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not
set
Incoming update filter list for all interfaces is not
set
Router ID 30.1.1.1
Number of areas in this router is 1. 1 normal 0 stub
0 nssa
Maximum path: 4
Routing for Networks:
2.0.0.0 0.255.255.255 area 0
3.0.0.0 0.255.255.255 area 0
30.0.0.0 0.255.255.255 area 0
Routing Information Sources:
Gateway
Distance Last Update
10.1.1.1
110 00:12:40
20.1.1.1
110 00:14:46
Distance: (default is 110)
R3#show ip route ospf
Gateway of last resort is not set
O 1.0.0.0/8 [110/128] via 3.3.3.2,
00:12:45, Serial3/2
[110/128] via 2.2.2.1, 00:14:52, Serial3/1
O 10.0.0.0/8 [110/65] via 3.3.3.2,
00:12:45, Serial3/2
O 20.0.0.0/8 [110/65] via 2.2.2.1,
00:53:04, Serial3/1
R1(config)#access-list 111 permit icmp host 10.1.1.1 host
30.1.1.1 echo
R1(config)#access-list 111 permit icmp host 10.1.1.1 host
30.1.1.1 echo-reply
R1(config)#access-list 122 permit tcp any any eq www
R1(config)#class-map icmp_tr
R1(config-cmap)#match access-group 111
R1(config-cmap)#exit
R1(config)#class-map web_tr
R1(config-cmap)#match access-group 122
R1(config-cmap)#exit
R1#show run class-map
Building configuration...
Current configuration : 111 bytes
!
class-map match-all web_tr
match access-group 122
class-map match-all icmp_tr
match access-group 111
end
R1(config)#policy-map internetworks
R1(config-pmap)#class icmp_tr
R1(config-pmap-c)#bandwidth 130
R1(config-pmap-c)#exit
R1(config-pmap)#class web_tr
R1(config-pmap-c)#bandwidth 70
R1(config-pmap-c)#exit
R1(config-pmap)#class class-default
R1(config-pmap-c)#exit
R1#show run policy-map
Building configuration...
Current configuration : 116 bytes
!
policy-map internetworks
class icmp_tr
bandwidth 130
class web_tr
bandwidth 70
class class-default
!
end
R1(config)#interface serial 3/2
R1(config-if)#service-policy output internetworks
R1(config-if)#end
R1#show policy-map interface serial 3/2
Serial/2
Service-policy output: internetworks
Class-map: icmp_tr (match-all)
0 packets, 0 bytes
5 minute offered rate 0000 bps,
drop rate 0000 bps
Match: access-group 111
Queueing
queue limit 64 packets
(queue depth/total
drops/no-buffer drops) 0/0/0
(pkts output/bytes output)
0/0
bandwidth 130 kbps
Class-map: web_tr (match-all)
0 packets, 0 bytes
5 minute offered rate 0000
bps, drop rate 0000 bps
Match: access-group 122
Queueing
queue limit 64 packets
(queue depth/total
drops/no-buffer drops) 0/0/0
(pkts output/bytes output)
0/0
bandwidth 70 kbps
Class-map: class-default (match-any)
5 packets, 288 bytes
5 minute offered rate 0000
bps, drop rate 0000 bps
Match: any
queue limit 64 packets
(queue depth/total
drops/no-buffer drops) 0/0/0
(pkts output/bytes output)
5/288
R1#PING 30.1.1.1 SOURCE 10.1.1.1 REPEAT 100
Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 30.1.1.1, timeout is 2
seconds:
Packet sent with a source address of 10.1.1.1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip
min/avg/max = 20/29/44 ms
R1#show policy-map interface serial 3/2
Serial3/2
Service-policy output: INTERNETWORKS
Class-map: ICMP_TR (match-all)
100 packets, 10400 bytes
5 minute offered rate 0000 bps, drop
rate 0000 bps
Match: access-group 111
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer
drops) 0/0/0
(pkts output/bytes output) 100/10400
bandwidth 130 kbps
Class-map: WEB_TR (match-all)
0 packets, 0 bytes
5 minute offered rate 0000 bps, drop
rate 0000 bps
Match: access-group 122
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer
drops) 0/0/0
(pkts output/bytes output) 0/0
bandwidth 70 kbps
Class-map: class-default (match-any)
15 packets, 1153 bytes
5 minute offered rate 0000 bps, drop
rate 0000 bps
Match: any
queue limit 64 packets
(queue depth/total drops/no-buffer
drops) 0/0/0
(pkts output/bytes output) 15/1153
