From: Richard Dumoulin (richard.dumoulin@vanco.es)
Date: Thu Mar 04 2004 - 11:14:21 GMT-3
Previously, in order to perform a soft reset for inbound routing table
updates, the neighbor soft-reconfiguration command directed the Cisco IOS
software in the local BGP router to store all received (inbound) routing
policy updates without modification. This method is memory-intensive and not
recommended unless absolutely necessary. (Outbound updates have never
required the extra memory and are not affected by this feature.)
With this software release, the BGP Soft Reset Enhancement feature provides
automatic support for dynamic soft reset of inbound BGP routing table
updates that is not dependent upon stored routing table update information.
The new method requires no preconfiguration (as with the neighbor
soft-reconfiguration command) and requires much less memory than the
previous soft reset method for inbound routing table updates.
http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1830/products_feat
ure_guide09186a0080087b3a.html#wp19507
So basically it is an enhancement !!
--Richard
-----Mensaje original-----
De: Packet Man [mailto:ccie2b@hotmail.com]
Enviado el: jueves, 04 de marzo de 2004 14:09
Para: Richard Dumoulin; marko.berend@storm.hr; ccielab@groupstudy.com
Asunto: RE: BGP session resets: Hard versus Soft
Hey Richard,
What do you mean "use route refresh"? It's my understanding that route
refresh is a negotiated capability that allows a soft reset ( clear ip bgp
[option] soft) without any pre-configuration. Is your understnding
different?
Thanks
>From: Richard Dumoulin <richard.dumoulin@vanco.es>
>To: Packet Man <ccie2b@hotmail.com>, marko.berend@storm.hr,
>ccielab@groupstudy.com
>Subject: RE: BGP session resets: Hard versus Soft
>Date: Thu, 4 Mar 2004 12:29:18 -0000
>
>I think you are right and hard reset is too slow. I would use route refresh
>or soft, but the advantage of route refresh is that you don't have to
>configure it for. With soft you have to enter neighbor x.x.x.x soft in,
>
>--Richard
>
>-----Mensaje original-----
>De: Packet Man [mailto:ccie2b@hotmail.com]
>Enviado el: jueves, 04 de marzo de 2004 13:03
>Para: marko.berend@storm.hr; ccielab@groupstudy.com
>Asunto: RE: BGP session resets: Hard versus Soft
>
>
>Thanks for getting back to me.
>
>I'm surprised with your response, though, because I know that with my 2500
>series routers, there's a big difference in how long a soft and hard reset
>take. So, I figured, in the lab, there would also be a difference in time,
>but maybe it's not that great.
>
>As far as when a reset is needed, it's my undersatnding that whenever any
>change in BGP policy takes place that affects what routes are allowed in or
>out, a reset (either hard or soft) is needed. Don't you agree?
>
>PM
>
>
>
>
> >From: "Marko Berend" <marko.berend@storm.hr>
> >Reply-To: "Marko Berend" <marko.berend@storm.hr>
> >To: <ccielab@groupstudy.com>
> >Subject: RE: BGP session resets: Hard versus Soft
> >Date: Thu, 4 Mar 2004 11:34:35 +0100
> >
> >It is the same amount of time, it has little to do with processing power
> >I think.
> >
> >Soft reset is IMHO reliable enough for the feats that it's available
> >for.
> >
> >I always try a soft reset first (on both sides to be sure), if I don't
> >see any result then I do a hard reset. You can save a lot of time with
> >soft resets if you do a lot of experimenting. There is actualy a list of
> >things which can use the soft reset, don't know it by heart, do a little
> >research.
> >
> >-----Original Message-----
> >From: Packet Man [mailto:ccie2b@hotmail.com]
> >Sent: Wednesday, March 03, 2004 7:42 PM
> >To: ccielab@groupstudy.com
> >Subject: BGP session resets: Hard versus Soft
> >
> >
> >Hi gang,
> >
> >On a 2500 series router, doing a hard reset of a BGP session takes about
> >1
> >to 2 minutes. In the lab, since they use higher end routers, I'm
> >wondering
> >how long that takes?
> >
> >Also, I've herad that soft resets aren't 100% reliable and therefore I
> >should just do a hard reset. So, bottom line, do people think it's
> >better
> >to do hard or soft BGP session resets in the real lab.
> >
> >Thanks in advance, PM
> >
> >_________________________________________________________________
> >Store more e-mails with MSN Hotmail Extra Storage 4 plans to choose
> >from!
> >http://click.atdmt.com/AVE/go/onm00200362ave/direct/01/
> >
> >_______________________________________________________________________
> >Please help support GroupStudy by purchasing your study materials from:
> >http://shop.groupstudy.com
> >
> >Subscription information may be found at:
> >http://www.groupstudy.com/list/CCIELab.html
> >
> >_______________________________________________________________________
> >Please help support GroupStudy by purchasing your study materials from:
> >http://shop.groupstudy.com
> >
> >Subscription information may be found at:
> >http://www.groupstudy.com/list/CCIELab.html
>
>_________________________________________________________________
>Learn how to help protect your privacy and prevent fraud online at Tech
>Hacks & Scams. http://special.msn.com/msnbc/techsafety.armx
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Thu Apr 01 2004 - 08:15:14 GMT-3