SNR S2989G-48TX-DC [237/553] Ipv4 black hole routing

S2989G-24TX Operation Manual

Chapter 4 Routing Protocol Related Configuration

4-12

set in SwitchB.

PC-C:10.1.5.2

SwitchA

vlan2:10.1..2.1 vlan1:10.1.3.1 SwitchB

Figure 4-2 Static Route Configurations

Configuration steps:

Configuration of layer3 SwitchA

Switch#config

Switch (config) #ip route 10.1.5.0 255.255.255.0 10.1.2.2

Configuration of layer3 SwitchC

Switch#config

Next hop use the partner IP address

Switch(config)#ip route 10.1.1.0 255.255.255.0 10.1.2.1

Next hop use the partner IP address

Switch(config)#ip route 10.1.4.0 255.255.255.0 10.1.3.1

Configuration of layer3 SwitchB

Switch#config

Switch(config)#ip route 0.0.0.0 0.0.0.0 10.1.3.2

In this way, ping connectivity can be established between PC-A and PC-C, and PC-B and

PC-C.

4.3

IPv4 Black Hole Routing

4.3.1

Introduction to Black Hole Routing

Black Hole Routing is a special kind of static routing which drops all the datagrams

that match the routing rule.

PC-A:10.1.1.2

PC-B:10.1.4.2

SwitchC vlan3:10.1.5.1

vlan2:10.1.2.2

vlan1:10.1.3.2

vlan1:10.1.1.1

vlan2:10.1.4.1