Category Archives: Path Control

BGP: Path selection lab

The lab is from my friend, Andrey, you can find the lab objective here: http://eccentric.mae.cornell.edu/~andrey/labs/BGP%20Dual-connected%20AS%20with%20OSPF.pdf R1: 1841-1 R2: 2651-1 R3: 2651-2 R4: 1841-2 R5: 3825-1 Subnet at segment between R1 and R2: 192.168.1.0/24 Subnet at segment between R2 and R3: … Continue reading

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PBR: Force guest vlan to the desired path

This diagram is the same as the previous diagram in my post about VRF-lite. Another method is to use PBR to control traffic. Create access list access-list 1 permit 10.100.20.0 0.0.0.255 Create route-map route-map guest-redirect permit 10 match ip address … Continue reading

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VRF-Lite: Experiment with real gear

Continue from my previous blog post about VRF-lite. This time I am trying with real gear to test out. No route in actual routing table RXC#sh ip route Codes: C – connected, S – static, R – RIP, M – … Continue reading

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VRF-Lite: Applying VRF-lite to segregate different traffic for different destination

This configuration is done only on router (RXC). The objective is to segregate the traffic between two vlans, for vlan 10 the traffic will go towards Production internet and vlan 20 will go towards Guest internet. Virtual routing and forwarding … Continue reading

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Route Filtering: EIGRP and RIP mixed protocol lab 1.2

Objective: Configure a route filter at A that will only allow subnets 172.16.2.0/24, 172.16.8.0/24 and 172.16.9.0/24 to be advertised into RIP domain. D#sh ip route rip 172.16.0.0/24 is subnetted, 13 subnets R       172.16.253.0/24 is possibly down, routing via 172.16.252.1, FastEthernet0/0 … Continue reading

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Route filtering: EIGRP and RIP mixed protocol lab.

Objective: Configure a route filter at A (R1) that will prevent D (R4) from learning about subnet 172.16.10.0/24 D#sh ip route 172.16.0.0/24 is subnetted, 14 subnets C       172.16.252.0 is directly connected, FastEthernet0/0 R       172.16.253.0 [120/1] via 172.16.252.1, 00:00:13, FastEthernet0/0 R       … Continue reading

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PBR: Configuring policy-based routing using route-map and ip sla monitor

I am using two routers to emulate client 1 and 2. Client1#sh run | s int interface FastEthernet0/0 ip address 192.168.1.10 255.255.255.0 no ip route-cache duplex auto speed auto Client1#sh run | i no ip no ip routing no ip … Continue reading

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