[c-nsp] delay eBGP sessions on startup?

[masood at nexlinx.net.pk]

probably Cisco needs a knob very similar to vendor Juniper out-delay. you
can delay the time between when BGP and the routing table exchange route
information.

http://www.juniper.net/techpubs/software/junos/junos73/swconfig73-routing/html/bgp-config58.html#1016387

Regards,
Masood

> On Mon, Nov 23, 2009 at 09:10:25AM +0100, Gert Doering wrote:
>>   "bgp update-delay <n>"
>>
>> "the bgp update-delay command is used to tune the maximum time the
>> software will wait after the first neighbor is established until it
>> starts calculating best paths and sending out advertisements".
>>
>> Now, what does "maximum time" mean?  Will it wait, or will it not?
>>
>> The documentation that I found claims that the default value is "120",
>> which would certainly not agree with the observed behaviour.  OTOH,
>> Marco claims that he has seen "0" as a default...
>
> The docs make it look like more of a graceful-restart specific timer,
> not like advertisement-interval (intentionally delaying the propagation
> of new updates to try and consolidate them) or the "on-startup" delay
> behaviors available in the IGPs.
>
> http://www.cisco.com/en/US/products/ps6550/products_white_paper09186a008016317c.shtml
>
> The "bgp update-delay n" command may be entered on the Cisco NSF-capable
> router. The update-delay specifies the time interval- after the first
> peer has reconnected during which the restarting router expects to
> receive all BGP updates and the EOR marker from all of its configured
> peers. The default value of n is 120 seconds, and n is always measured
> in seconds. If the restarting router has a large number of peers, each
> with a large number of updates to be sent, this value may need to be
> increased from its default value.
>
> --
> Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
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