[alcatel-nsp] bgp min-route-advertisement

Alexander Saveliev saveliev at mostelekom.net
Tue Jun 7 02:18:16 EDT 2011


This is true, especially for address-family with full view.
But also true is that in bgp/mpls vpns often there are no many peering 
points and no full view of internet routes. 30sec restriction 
significantly reduces convergence time in this networks, especially in 
redundant topologies.
So it is common practice, from "another vendor" for example, to set 
default time for eBGP sessions in GRT equal to 30 secs, but to set it 
equal to zero secs for iBGP and for PE-CE sessions in VPNs.

Ok. My main question is- may be somebody know something important about 
ALU routers that can have a serious negative impact when setting 
advertisement equal to 1 sec?


07.06.2011 01:03, Thedin Guruge ?????:
> Hi Alexander,
> As depicted by the config itself, it determines the interval at which 
> routes are advertised to peers, having it at 1 sec will set BGP to be 
> more chatty..which isn't a common desire.
> Regards,
> Thedin
> On Mon, Jun 6, 2011 at 6:26 PM, Alexander Saveliev 
> <saveliev at mostelekom.net <mailto:saveliev at mostelekom.net>> wrote:
>     Hello,
>     Does anybody know what's the point for choosing
>     min-route-advertisement=30sec in all BGP processes by default? Why
>     not 1sec for example?
>     Thanks,
>     Alexander
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