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Configuring BFD Offload
Bidirectional Forwarding Detection (BFD) offload support provides the functionality to offload a BFD
session to the field-programmable gate array (FPGA). BFD is a forwarding path failure detection
protocol and reduces the overall network convergence time by sending rapid failure detection packets
(messages) to the routing protocols for recalculating the routing table. Previously the performance of
BFD was restricted to the capabilities of CPU and IOS on the RP of the switch. Effective failure
detection requires BFD to run at high frequencies (using aggressive timers as low as 50ms), which was
not possible because of CPU and IOS restrictions.
For information on configuring BFD see Configuring BFD section of
Software Configuration
Note
On the Cisco ME 3600X-24CX, BFD session will be supported only on the FPGA, BFD sessions on the
RP are not supported.
Restrictions for BFD Offload Support
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Configuring BFD Offload Support
The BFD offload functionality is enabled by default. You can configure BFD hardware offload on the
route processor.
OL-27620-01
Guide.
Only BFD version 1 is supported.
Only FPGA offloaded BFD sessions are supported, BFD sessions on RP are not supported on ME
3600X-24CX-M.
The switch supports BFD only in Asynchronous mode or no echo mode.
The switch supports 511 asynchronous BFD sessions.
BFD hardware offload is supported for IPv4 sessions with non-echo mode only.
BFD offload is supported on port-channel interfaces.
BFD offload is supported only for the ethernet interface.
BFD offload is not supported for IPv6 BFD sessions.
BFD offload is not supported for BFD with TE/FRR
C H A P T E R
Cisco ME-3600X-24CX Series Switch Chassis Configuration Guide
3
ME 3800x and ME 3600x Switches
3-1
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