RE: BFD ques

Hi,

Bi-directional Forwarding Detection (BFD) provides rapid failure detection
times between forwarding engines, while maintaining low overhead. It also
provides a single, standardized method.

There are two different methods to inform OSPF that it should use BFD for
failure detection. BFD can be enabled at the router if all OSPF neighbors
have implemented BFD.

router ospf 999
bfd all-interfaces
!
Or you can also enable or disable BFD on a per-interface basis:

interface fastEthernet 1/1/1
[no] ip ospf bfd [disable]

BFD is not tied to any particular routing protocol, it can be used as
failure detection mechanism for OSPF, IS-IS, EIGRP, BGP and so on. Some
parts of BFD can be distributed to the data plane, it can be less CPU
intensive than Fast HELLOs, which exist wholly at the control plane. Fast
HELLOs have an absolute minimum detection timer of one second; BFD can
provide sub-second failure detection.

Thanks,

Victor Cappuccio.-
vcappucc_at_cisco.com
CCIE(R/S) #20657
STAC Support Engineer
Cisco Small Business Support.
Telefono 900 900 089

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Abdullahi Bege Abubakar
Sent: viernes, 03 de julio de 2009 13:16
To: Thomas Perrier
Cc: Cisco certification
Subject: Re: BFD ques

hi guys, i have read through the cod cd but need more light about what the*
ip ospf bfd* accomplish.

Abdullahi Bege A.
CCNA CCNP CCIE Wirtten
Network Engineer
Microaccess solution Ltd,
Cisco Silver Partner Certified
www.microaccess.com
On Thu, Jul 2, 2009 at 2:01 PM, Thomas Perrier <thomas_at_perrier.name> wrote:

> On Thu, Jul 2, 2009 at 2:34 PM, GAURAV MADAN<gauravmadan1177_at_gmail.com>
> wrote:
>
> > My software version is c3825-ipbase-mz.124-24.6.T5
>
> > CCIE
>
> It's somewhat painful that a CCIE wouldn't know that many features
> aren't supported in IP Base IOS versions. Back to operationnal basics,
> man! ;)
>
> -Thomas
>
>
> Blogs and organic groups at http://www.ccie.net
>
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Received on Fri Jul 03 2009 - 13:39:43 ART