From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Fri Sep 24 2004 - 19:17:38 GMT-3
JP,
Synchronization is considered a legacy rule, and design-wise it
is not practical to have it enabled. However, the problem it is
designed to prevent must still be addressed. Synchronization is
designed to prevent the case where BGP traffic transits non-BGP speaking
devices, and as you said results in traffic black holes.
Now within the scope of the CCIE lab, if the exam doesn't say
"don't disable synchronization", then don't add extra headaches and
leave it on. Actually, it's off by default as of 12.2(8)T now.
However, just because you turn synchronization off doesn't mean you have
addressed the problem it's designed to prevent.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> jean.paul.baaklini@accenture.com
> Sent: Friday, September 24, 2004 4:59 PM
> To: ccielab@groupstudy.com
> Subject: BGP synchronization
>
> Hi Group,
>
> With BGP, in a Stub AS environment, synchronization could be useful to
> avoid traffic black-holes.
>
> Does anyone know another case where Sync should be enabled?
> Or is it a good practice to keep it disabled on all routers for the
CCIE
> lab?
>
> Thanks for your inputs.
>
> Regards,
> JP
>
>
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