Cisco Catalyst 4500 Series Configuration Manual page 825

Chapter 37 Configuring Bidirection Forwarding Detection
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 SwitchC
!
!
interface GigabitEthernet6/2
no switchport
no shutdown
ip address 10.4.9.34 255.255.255.0
!
interface GigabitEthernet6/1
no switchport
ip address 172.16.1.3 255.255.255.0
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
!
!
end
The output from the show bfd neighbors details command from SwitchA verifies that BFD sessions
have been created among all three switches and that EIGRP is registered for BFD support. The first
group of output shows that SwitchC with the IP address 172.16.1.3 runs BFD Version 0 and therefore
does not use the echo mode. The second group of output shows that SwitchB with the IP address
172.16.1.2 does run BFD Version 1, and the 50 millisecond BFD interval parameter had been adopted.
The relevant command output is shown in bold in the output.
SwitchA
SwitchA# show bfd neighbors details
OurAddr
172.16.1.1
Session state is UP and not using echo function.
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 50000, MinRxInt: 50000, Multiplier: 3
Received MinRxInt: 50000, Received Multiplier: 3
Holdown (hits): 150(0), Hello (hits): 50(1364284)
Rx Count: 1351813, Rx Interval (ms) min/max/avg: 28/64/49 last: 4 ms ago
Tx Count: 1364289, Tx Interval (ms) min/max/avg: 40/68/49 last: 32 ms ago
Registered protocols: EIGRP
Uptime: 18:42:45
Last packet: Version: 0
OL-25340-01
NeighAddr LD/RD
172.16.1.3 5/3
- Diagnostic: 0
I Hear You bit: 1 - Demand bit: 0
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Configuration Examples for Bidirectional Forwarding Detection
RH/RS Holdown(mult)
1(RH) 150 (3 )
State Int
Up Gi6/1
37-19