Email address obfuscation in effect -- please
click here to turn it off.
[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
multiple spanning trees? Why would any one want to do that? One should be
enough to identify any possible loops.
ISIS, or some people write it IS-IS, it means intermediate system to
intermediate system. It's a link state routing protocol, kind of like OSPF,
but without an area 0. We have area's but no area zero, so OSPF did not fit
our network at all. We were using EIGRP a long time ago, but the number of
connections was overloading it.
ICMP isn't used in sending update messages. BGP uses TCP, and ISIS... I'm
not sure off the top of my head what ISIS uses. you might spoof a bunch of
ICMP host unreachable messages, but I'm not sure what that would get you.
Shannon Spurling
WAN Engineer -Specialist
MOREnet, Network Services, Core Network
3212 Le Mone Industrial Blvd.
Columbia, MO 65201
Main:(573) 884-7200 Fax:(573)884-6673
EMAIL:PROTECTED
EMAIL:PROTECTED
-----Original Message-----
From: Brent Deterding [mailto:EMAIL:PROTECTED]
Sent: Tuesday, October 02, 2001 12:53 PM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] morenet today (was "Your thoughts on this")
ICMP Route Changes spoofed to a router perhaps?
Right, got the IGMP part (ISIS sounds cool - what is it?)
Ahh - got it. I thought IGMP was responsible for passing it to EBGP directly
-
didn't know there was a IBGP. thanks!
I always like knowing a little more than the average joe about networking.
Although I tried talking to a Cisco guy about multiple spanning trees and
you
would have thought I was speaking an Eskimo dialect. Evidently Cisco doesn't
use
multiple spanning trees; just one?
-- Brent
-----Original Message-----
From: EMAIL:PROTECTED
[mailto:EMAIL:PROTECTED]On Behalf Of Spurling, Shannon
Sent: Tuesday, October 02, 2001 11:41 AM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] morenet today (was "Your thoughts on this")
Not NIMDA. ICMP. Someone must have gotten on someone else's bad side. There
was something funny about the ICMP, because that stuff should have just
passed through.
The idea here is there are layers to the routing tables. When you are
routing internally, you use the IGMP (We use ISIS). When you have something
not in your network, you use IBGP to determine the nearest egress circuit,
and then route to it using the IGMP. Once you get to the boarder, EBGP will
point the packet out to the next autonomous system. The latency was because
the IBGP was having trouble converging, because of the ICMP packets, as near
as we can figure.
Just say no to flaming on IRC, you don't know how much you really pissed
them off. (That's just speculation on my part.:-))
Shannon Spurling
WAN Engineer -Specialist
MOREnet, Network Services, Core Network
3212 Le Mone Industrial Blvd.
Columbia, MO 65201
Main:(573) 884-7200 Fax:(573)884-6673
EMAIL:PROTECTED
EMAIL:PROTECTED
-----Original Message-----
From: Brent Deterding [mailto:EMAIL:PROTECTED]
Sent: Tuesday, October 02, 2001 11:00 AM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] morenet today (was "Your thoughts on this")
Ahhh - same problems everyone had with NIMDA. Routers were dropping off and
on
causing tables to update. Setting an update threshold works much better.
Internally shouldn't you use IGMP? Been a while since my network days so go
easy
on me . . .
-- Brent
-----Original Message-----
From: EMAIL:PROTECTED
[mailto:EMAIL:PROTECTED]On Behalf Of Spurling, Shannon
Sent: Tuesday, October 02, 2001 10:28 AM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] morenet today (was "Your thoughts on this")
Okay, no names though. Here is the official statement:
The network congestion and latency problem that affected all MOREnet
customers this afternoon has been identified and resolved as of 5:45pm this
evening. The MOREnet Security Group helped identify the origin of the
network latency as an attack on a workstation within one of MOREnet's
customer's networks. This attack was being inadvertently redistributed via
iBGP routing methods and forcing constant updates of the MOREnet routing
tables creating an unusually high level of latency throughout the MOREnet
network. Adjustments in the Core network filtering configuration have been
made to prevent similar attacks in the future.
Christopher Kilbride
MOREnet
Network Services, Core Group Supervisor
(573)882-5444
Shannon Spurling
WAN Engineer -Specialist
MOREnet, Network Services, Core Network
3212 Le Mone Industrial Blvd.
Columbia, MO 65201
Main:(573) 884-7200 Fax:(573)884-6673
EMAIL:PROTECTED
EMAIL:PROTECTED
-----Original Message-----
From: Brent Deterding [mailto:EMAIL:PROTECTED]
Sent: Tuesday, October 02, 2001 10:30 AM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] morenet today (was "Your thoughts on this")
OK now I'm curious. What happened? Security concern? Someone plug a router
into
itself? Chancellor plug up the pipe looking at pigsex.com? (wonder if that
is
really a site?)
Do tell!
-- Brent
-----Original Message-----
From: EMAIL:PROTECTED
[mailto:EMAIL:PROTECTED]On Behalf Of Spurling, Shannon
Sent: Tuesday, October 02, 2001 9:52 AM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] morenet today (was "Your thoughts on this")
There was no "connectivity" problem really. It was more of a traffic
issue.... Let's just leave it at that. And that it wasn't really our
fault...
Shannon Spurling
WAN Engineer -Specialist
MOREnet, Network Services, Core Network
3212 Le Mone Industrial Blvd.
Columbia, MO 65201
Main:(573) 884-7200 Fax:(573)884-6673
EMAIL:PROTECTED
EMAIL:PROTECTED
-----Original Message-----
From: Aaron Littich [mailto:EMAIL:PROTECTED]
Sent: Monday, October 01, 2001 10:15 PM
To: EMAIL:PROTECTED
Subject: Re: [MLUG] morenet today (was "Your thoughts on this")
Yea,
all of us down here at umr have been wondering whats up... just picture a
bunch of geek engineers without internet connection, or a slow one! Pure
Havoc!
----- Original Message -----
From: "Jeremy Norris" <EMAIL:PROTECTED>
To: <EMAIL:PROTECTED>
Sent: Monday, October 01, 2001 6:08 PM
Subject: Re: [MLUG] morenet today (was "Your thoughts on this")
> I have been told by my boss that more.net was/is having a connectivity
problem
> of late.
>
> Jeremy
> (Public School technician)
>
> On Mon, Oct 01, 2001 at 06:06:39PM -0500, Ian Monroe wrote:
> > The internet connection using the school district connection (which uses
> > MoreNet) at the Career Center was slow this afternoon. This doesn't mean
> > it was morenet's fault.
> >
> > Ian
> >
> > On Mon, 1 Oct 2001, Mike Miller wrote:
> >
> > > On Mon, 1 Oct 2001, Aaron Littich wrote:
> > >
> > > > PS, is there something wrong with morenet connection today?
> > >
> > > Nothing too bad because I've been connected by ssh from umn.edu to
> > > missouri.edu all day without any slowness that I could detect.
> > >
> > > Mike
> > >
> > > --
> > > To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
> > >
> > > Archives are available at http://mlug.missouri.edu/list-archives/
> > >
> >
> > --
> > To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
> >
> > Archives are available at http://mlug.missouri.edu/list-archives/
> --
> To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
>
> Archives are available at http://mlug.missouri.edu/list-archives/
>
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php
Archives are available at http://mlug.missouri.edu/list-archives/
Home | FAQ | Server | Presentations | Mailing Lists/Archives | Member Tools | Links | Sponsors | Contact