Reference Guide
Bidirectional Forwarding Detection (BFD) | 293
Parameters
Defaults
None
Command Modes
EXEC Privilege
Command
History
Related
Commands
debug bfd 
c e
Enable BFD debugging.
Syntax
debug bfd 
{detail | event | packet} {all | interface} [mode] [count number]
Parameters
interface
(OPTIONAL) Enter one of the following keywords and slot/port or number 
information:
• For a 1-Gigabit Ethernet interface, enter the keyword 
gigabitethernet 
followed by the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword 
tengigabitethernet followed by the slot/port information.
• For a SONET interface, enter the keyword 
sonet followed by the slot/
port information.
• For a port-channel interface, enter the keyword 
port-channel followed 
by a number:
C-Series and S-Series Range: 1-128
E-Series Range: 1 to 32 for EtherScale, 1 to 255 for TeraScale, and 1 to 
512 for ExaScale
• For VLAN interfaces, enter the keyword 
vlan followed by a number 
from 1 to 4094. For ExaScale VLAN interfaces, the range is 1-2730 
(VLAN IDs can be 0-4093).
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.7.1.0 Introduced on C-Series
Version 7.5.1.0 Added support for VLAN and port-channel interfaces on E-Series
Version 7.4.1.0 Introduced on E-Series
show bfd counters Display BFD counter information.
detail
(OPTIONAL) Enter this keyword to display detailed information about BFD 
packets.
event
(OPTIONAL) Enter this keyword to display information about BFD state. 
The 
mode option is not available with this option.
packet
(OPTIONAL) Enter the keyword packet to display brief information about 
control packets.
all
Enter this keyword to enable debugging on all interfaces. The count option is 
not available with this option.










