Re: BFD ques

Thnx Scott for good link

Gaurav Madan

On Fri, Jul 3, 2009 at 4:53 PM, Scott Morris<smorris_at_ine.com> wrote:
> If not all devices support BFD, you can alternately (or preferred?)
> selected "ip ospf dead-interval minimal hello-multiplier (#)" as option
> as well.
>
> The maximum value for the hello multiplier (how many hellos within
> 1-second dead time) is 20. So you can get 50ms hellos. BFD operates
> with this as a minimum timer as well!
>
> There's a decent article on NiL's web site about BFD (they're a Cisco
> Learning Partner from Slovenia as I recall):
> http://www.nil.si/ipcorner/bfd/
>
> HTH,
>
>
>
>
> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,
>
> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>
> JNCI-M, JNCI-ER
>
> evil_at_ine.com
>
>
> Internetwork Expert, Inc.
>
> http://www.InternetworkExpert.com
>
> Toll Free: 877-224-8987
>
> Outside US: 775-826-4344
>
>
> Knowledge is power.
>
> Power corrupts.
>
> Study hard and be Eeeeviiiil......
>
>
>
>
>
> Victor Cappuccio wrote:
>> 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
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Jul 03 2009 - 17:24:40 ART