Type of service policies

FIGURE 1 0 . 5 Type of service policies
In this scenario, we will configure ToS policies on R1 and R4. The policy on R1 needs to set
the ToS for network 192.168.1.0 /24 for maximum reliability and network 192.168.10.0 /24 for
minimum delay, and all other traffic needs to be set to normal. The policy on R4 needs to set the
ToS for network 192.168.100.0 /24 for maximum throughput and network 192.168.200.0 /24
for minimum monetary cost, and all other traffic needs to be set to normal.
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#access-list 1 permit 192.168.1.0 0.0.0.255
R1(config)#access-list 2 permit 192.168.10.0 0.0.0.255
R1(config)#route-map TOSPOLICY1 permit 10
R1(config-route-map)#match ip address 1
R1(config-route-map)#set ip tos max-reliability
R1(config-route-map)#route-map TOSPOLICY1 permit 20
R1(config-route-map)#match ip address 2
R1(config-route-map)#set ip tos min-delay
R1(config-route-map)#route-map TOSPOLICY1 permit 30
R1(config-route-map)#set ip tos normal
.1
E0
.1
E0
.1
E0
.1
.1
.1
.1
.1
.1
.1
E0
Network
Core
S0
S1/1
S1/1
S1/0
S1/0
S1/2
S1/2
.2
S0
.2
S0
.2
S0
.2
10.10.10.0 /30
20.20.20.0 /30
30.30.30.0 /30
40.40.40.0 /30
R1
R4
R6 192.168.200.0 /24
R5 192.168.100.0 /24
R3 192.168.10.0 /24
R2 192.168.1.0 /24
Verifying and Troubleshooting Policy-Based Routing Operation 333
R1(config-route-map)#exit
R1(config)#interface s1/0
R1(config-if)#ip policy route-map TOSPOLICY1
R1(config-if)#exit
R1(config)#interface S1/1
R1(config-if)#ip policy route-map TOSPOLICY1
R1(config-if)#^Z
R1#
R4#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R4(config)#access-list 1 permit 192.168.100.0 0.0.0.255
R4(config)#access-list 2 permit 192.168.200.0 0.0.0.255
R4(config)#route-map TOSPOLICY1 permit 10
R4(config-route-map)#match ip address 1
R4(config-route-map)#set ip tos max-throughput
R4(config-route-map)#route-map TOSPOLICY1 permit 20
R4(config-route-map)#match ip address 2
R4(config-route-map)#set ip tos min-monetary-cost
R4(config-route-map)#route-map TOSPOLICY1 permit 30
R4(config-route-map)#set ip tos normal
R4(config-route-map)#exit
R4(config)#interface s1/0
R4(config-if)#ip policy route-map TOSPOLICY1
R4(config-if)#exit
R4(config)#interface S1/1
R4(config-if)#ip policy route-map TOSPOLICY1
R4(config-if)#^Z
R4#
Through the use of policy-based routing, the administrator will have better control of the
path that a packet follows. Policy-based routing also allows the administrator to overcome
the shortest path limitations put in place by standard destination-based routing protocols.