Cisco Catalyst 4500 Series Configuration Manual page 824

Release ios xe 3.3.0sg and ios 15.1(1)sg
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Configuration Examples for Bidirectional Forwarding Detection
run on the forwarding path for RouteA and SwitchB, and their echo packets will return along the same
path for BFD sessions and failure detections, while their BFD neighbor SwitchC runs BFD Version 0
and uses BFD controls packets for BFD sessions and failure detections.
Figure 37-3
are running EIGRP as their routing protocol.
Figure 37-3
Gigabit Ethernet 6/2
The example, starting in global configuration mode, shows the configuration of BFD.
Configuration for SwitchA
interface GigabitEthernet6/2
no switch
ip address 10.4.9.14 255.255.255.0
!
interface GigabitEthernet6/1
no switchport
ip address 172.16.1.1 255.255.255.0
bfd interval 50 min_rx 50 multiplier 3
no shutdown
!
router eigrp 11
network 172.16.0.0
bfd all-interfaces
auto-summary
!
ip default-gateway 10.4.9.1
ip default-network 0.0.0.0
ip route 0.0.0.0 0.0.0.0 10.4.9.1
ip route 172.16.1.129 255.255.255.255 10.4.9.1
!
Configuration for SwitchB
!
interface GigabitEthernet6/2
no switchport
ip address 10.4.9.34 255.255.255.0
!
interface GigabitEthernet6/1
no switchport
ip address 172.16.1.2 255.255.255.0
bfd interval 50 min_rx 50 multiplier 3
!
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
37-18
shows a large EIGRP network with several switchs, three of which are BFD neighbors that
EIGRP Network with Three BFD Neighbors Running V1 or V0
SwitchB
172.16.1.1
GigabitEthernet 6/1
SwitchA
Chapter 37
Gigabit Ethernet 6/2
Gigabit Ethernet 6/2
172.16.1.2
Gigabit Ethernet 6/1
172.16.1.3
GigabitEthernet 6/1
Configuring Bidirection Forwarding Detection
Gigabit Ethernet 6/2
SwitchC
OL-25340-01

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