From: Scott Livingston (scottl@sprinthosting.net)
Date: Wed Feb 19 2003 - 17:51:45 GMT-3
Jeff,
What company? I want to make sure I never Host any of my gear out of
there. -grin-. I know what you are going through man. I have been there
and done that and it took 1 major outage (as predicted) before others
decided to support me. Although, we don't have all the facts here, it
sure sounds like your going through a time.
Being in my late 20's all I can say is show respect to those in
authority. Many don't like the young (or tenacious) person telling
others what an optimization or enhancement is. Respectfully state your
case (in e-mail too) and know that you did your best to create a better
solution. Either they will see it your way one day or not, but at any
rate you did your job.
In previous places of employment I would get a much better response on
down the road if I presented my case with definitive and proven
technologies. Who knows 6mths down the road maybe one of them will take
your idea twist one little aspect of it and make it their idea.. LOL!
It's all the same; best design was deployed. -another grin- Keep working
hard it will pay off!
scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
MADMAN
Sent: Wednesday, February 19, 2003 11:12 AM
To: jeff gercken
Cc: ccielab@groupstudy.com
Subject: Re: OT 6500 Topology question
I think there is a network engineering disease called STPphobia, it's
an irrational fear that STP is unstable, doesn't work and is impossible
at any rate to configure and troubleshoot.
Had a call yesterday, a switched network was very unstable, they
called saying they were having spanning tree problems. Well the problem
was not the STP but the design!!! The network had a diameter of 9,
spanning was working as advertised as it most often does. I could go on
but I think you get the point.
my $.02
Dave
jeff gercken wrote:
> I'm hoping someone can help me understand this. I am a network
engineer
> for a gov't facility in Indiana. We have (32) 6509's connected (Gig
E)
> in hub fashion to two 6509 core switches w/ MSFC's (each having
priority
> of one of two hsrp gateways). There are also around 53 vlans
configured
> and statically trunked to various access-layer switches. Our
> utilization is almost nothing with 'sh traffic' indicating a peak of
5%.
>
> Vlans that are only on 1 access-layer switch are not trunked between
the
> core switches meaning there are no STP blocked lines. The DHCP server
> assigns the gateways by round-robin.
>
> I wanted to move to a topology using uplinkfast and balancing by STP
> portvlan priorities. My reasoning was as much for monitoring as for
> convergence. Right now I have no idea how the traffic is flowing and
> trying to use a sniffer is about impossible.
>
> I've been overruled by the guys in DC who seem to believe that a STP
> blocked link is just as bad as a loop. None will explain their
> position, just a 'because I said so' answer. They also wouldn't let
me
> increase the core capacity using etherchannel. Our Cisco NSA
> Engineer(no, not that NSA) was down pushing AVID so I took the
> opportunity to ask. He took the same position as headquarters but
> really didn't/couldn't explain why.
>
> Does any of this make sense to anyone? Would you please help me to
> understand because it seems to sacrifice a lot just so you can have 2
> gigabit links instead of 1.
>
> I don't mean to clog up the list with this so please reply directly.
>
> Thanks in advance,
> Jeff
>
>
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-- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367"You don't make the poor richer by making the rich poorer." --Winston Churchill
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