Re: [OSL | CCIE_RS] BGP design question

As i stated in my e-mail, the latency that i saw was in 2 different areas,
one area was the correct next-hop being injected into the routers which was
a direct result of the peer session being terminated *between scan intervals
*.
When i was testing this feature, once BGP detected the adjacency change, it
terminated the peering between the scan intervals. Again, if you tested this
with what ever version of IOS you have and it worked correctly without this
latency being an issue, then, it is a nice solution. so once again when you
tested this, was the latency an issue?

On Sun, Mar 28, 2010 at 10:41 AM, Marko Milivojevic <markom_at_ipexpert.com>wrote:

> On Sun, Mar 28, 2010 at 17:38, Narbik Kocharians <narbikk_at_gmail.com>
> wrote:
> > Marko,
> >
> > When you tested this feature, did you test the latency, like when the
> > primary comes up after a failover and the back up letting go of the
> routes?
> > OR when the B/up actually takes over?
> >
> > I tested this feature when it first came out in 12.3 T something code (I
> > don't remember) and i had to play around with timers to speed up
> > convergence, and even then, it was kind of slow to converge between PRI
> to
> > B/up and or from B/up to Prim failover, and having the routers inject the
> > routes with the correct next-hop.
> > I will try to find that lab (Don't hold your breath, it was a long time
> > ago), But when i tested it, the second BGP detected an adjacency change,
> it
> > terminated the session, but this termination was NOT immediate (Once
> again,
> > PRI---B/up and/or B/up to PRIM and advertising the correct next-hop to
> the
> > other routers), this was between Scan intervals, and when i tried it few
> > times to see the range, i noticed that once awhile it took 15 seconds to
> 30
> > seconds.
>
> Let us not mix and match things here going into fine-tuning
> reconvergence times. When neighbor goes down, router will send updates
> to its peers with the new best-path, if it has one. That was not the
> question in this thread.
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
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>

-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com
Sr. Technical Instructor
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