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DES-7200 Configuration Guide Chapter 3 BFD Configuration
3-15
DES-7200# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
DES-7200(config)# interface fastEthernet 0/2
DES-7200(config-if)# bfd up-dampening 60000
3.3.5 Configuring the BFD
Protection Policy
BFD protocol is so sensitive that if the device with BFD function enabled suffers
from attack (for example, a large amount of Ping packets attack the device),
which lead to the BFD session turbulence, the device can be protected by
enabling the BFD protection policy. However, if the BFD function and the BFD
protection policy are enabled at the same time, the loss of BFD packets on the
attacked device occurs when the packets sent from the last-hop device go
through this device, influencing the BFD session establishment between the
last-hop device and other devices. This function is valid only for the switches.
Follow the following steps to configure the BFD protection policy:
Command Function
DES-7200>enable
Enter the privileged mode.
DES-7200# configure terminal
Enter the global configuration mode.
DES-7200(config)# bfd cpp
Enable the BFD protection policy.
DES-7200(config)# end
Exit the global configuration mode.
By default, the BFD CPP is enabled. Use the no bfd cpp command in the
global configuration mode to disable the BFD CPP.
The following example shows how to enable the BFD CPP:
DES-7200# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
DES-7200(config)# bfd cpp
3.3.6 Configuring the BFD for RIP
RIP sends the route updating information periodically. A route is invalid and RIP
cannot rapidly respond to the link failure when no route updating information is
received within the specified time.
After enabling the BFD for RIP, the BFD session will be established for the RIP
route information source(the source address for RIP route updating packet).
Once BFD detects that a neighbor is invalid, RIP route information will directly
be in the invalid state and not join in the route forwarding no longer. The