[j-nsp] Indirect next Hop

[Harry Reynolds]

A few have posted me indicating that the attached thread did not make
it.  Pasted inline here.

Its not really that meaty, but hoping its useful.

Regards




[begin]

Hey Richard, I can't comment on longer convergence times, but can
perhaps clarify the 8.2 INH feature.

JNI started using RE based INHs back in the 5.x time-frame, for the
reasons you describe. When a NH change occurs the RE can update a shared
INH to forwarding-next-hop mapping, regardless of how many routes are
sharing that single INH, which saves cycles.

In 8.2 we allow this functionality to extend from the control to the
data plane. IOW, we now have both RE and pfe INHs. Just as INH for the
RE reduced the control plane's workload, pfe INH reduces the PFEs work
load when a new next-hop is installed as the numbers of on-chip
writes/updates is reduced.

Hope this helps clarify.

Regards


> -----Original Message-----
> From: Pekka Savola [mailto:pekkas at netcore.fi] 
> Sent: Saturday, March 17, 2007 2:07 PM
> To: Harry Reynolds
> Subject: Re: [j-nsp] Indirect next Hop
> 
> On Fri, 16 Mar 2007, Harry Reynolds wrote:
> > See attached,  which was posted awhile back.
> 
> The attachment was empty...
> 
> >
> > HTHs
> >
> >
> >
> >> -----Original Message-----
> >> From: juniper-nsp-bounces at puck.nether.net
> >> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Junos Guy
> >> Sent: Friday, March 16, 2007 2:20 PM
> >> To: juniper-nsp at puck.nether.net
> >> Subject: [j-nsp] Indirect next Hop
> >>
> >> Hello,
> >>
> >> Can anyone explain Indirect Next Hop(JunOS 8.2) and how does it 
> >> improve bgp convergence.
> >>
> >> Thanks
> >> _______________________________________________
> >> juniper-nsp mailing list juniper-nsp at puck.nether.net 
> >> https://puck.nether.net/mailman/listinfo/juniper-nsp
> >>
> >
> 
> -- 
> Pekka Savola                 "You each name yourselves king, yet the
> Netcore Oy                    kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
>