Implementing Policy Based Routing (PBR) on Cisco Routers.
- April 15, 2024
- Posted by: Lyfey Technologies
- Categories: Cisco, Networking
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Last time we demonstrated how to configure PBR(Policy Based Routing) on Huawei routers. Check it from this link: Implementing PBR on Huawei Routers.
Configuration Steps
Step 1: Configure system hostnames and IP addresses on interfaces of all the routers.
*************************R5
enable
configure terminal
hostname R5
!
interface FastEthernet0/0
ip address 50.50.50.1 255.255.255.0
no shut
!
interface FastEthernet0/1
ip address 40.40.40.1 255.255.255.0
no shut
!
interface FastEthernet1/0
ip address 10.10.10.0 255.255.255.254
no shut
!
interface FastEthernet2/0
ip address 30.30.30.0 255.255.255.254
no shut
!
*************************R6
enable
configure terminal
hostname R6
!
interface FastEthernet0/0
ip address 10.10.10.1 255.255.255.254
no shut
!
interface FastEthernet0/1
ip address 10.10.10.2 255.255.255.254
no shut
!
*************************R7
enable
configure terminal
hostname R7
!
interface FastEthernet0/0
ip address 30.30.30.1 255.255.255.254
no shut
!
interface FastEthernet0/1
ip address 30.30.30.2 255.255.255.254
no shut
!
*************************R8
enable
configure terminal
hostname R8
!
interface FastEthernet0/0
ip address 10.10.10.3 255.255.255.254
no shut
!
interface FastEthernet0/1
ip address 10.10.10.4 255.255.255.254
no shut
!
*************************R9
enable
configure terminal
hostname R9
!
interface FastEthernet0/0
ip address 10.10.10.5 255.255.255.254
no shut
!
interface FastEthernet0/1
ip address 30.30.30.3 255.255.255.254
no shut
!
interface FastEthernet1/0
ip address 40.40.41.1 255.255.255.254
no shut
!
interface FastEthernet2/0
ip address 50.50.51.1 255.255.255.254
no shut
!
Step 2: Configure OSPF on all the routers.
*************************R5
!
router ospf 10
router-id 5.5.5.5
log-adjacency-changes
network 10.10.10.0 0.0.0.1 area 0
network 30.30.30.0 0.0.0.1 area 0
network 40.40.40.0 0.0.0.255 area 0
network 50.50.50.0 0.0.0.255 area 0
!
*************************R6
!
router ospf 10
router-id 6.6.6.6
log-adjacency-changes
network 10.10.10.0 0.0.0.1 area 0
network 10.10.10.2 0.0.0.1 area 0
!
*************************R7
!
router ospf 10
router-id 7.7.7.7
log-adjacency-changes
network 30.30.30.0 0.0.0.1 area 0
network 30.30.30.2 0.0.0.1 area 0
!
*************************R8
!
router ospf 10
router-id 8.8.8.8
log-adjacency-changes
network 10.10.10.4 0.0.0.1 area 0
network 10.10.10.2 0.0.0.1 area 0
!
*************************R9
!
router ospf 10
router-id 9.9.9.9
log-adjacency-changes
network 10.10.10.4 0.0.0.1 area 0
network 30.30.30.2 0.0.0.1 area 0
network 40.40.41.0 0.0.0.255 area 0
network 50.50.51.0 0.0.0.255 area 0
!
Step 3: Verify OSPF adjacency status
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Step 4: Verify the path taken by traffic from VPC1 and VPC2.
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The objective of this lab is to configure Policy Based Routing (PBR) to force traffic from VPC2 to VPC4 follows the path R5—>R6—->R8 —>R9—-VPC4 by specifying R6 as the next hop.
Step 5: Configure PBR on R5 and force traffic from VPC2 to flow to R6 as follows.
*************************R5
!
access-list 1 permit 40.40.40.2
!
route-map PBR_TEST permit 10
set ip next-hop 10.10.10.1
!
interface FastEthernet0/1
ip policy route-map PBR_TEST
!
Step 6: Verify the traffic flow from VPC01 is taking the path to R6.
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