Sad but true, I still have a few of these in operation as terminal servers. In
reading the documentation I could find it wasn't clear to me how to solve my
issue. I use these to manage Cisco routers.
How can I connect to a server, and then drop back to the CLI, so I can then
connect to
urpf doesn't work as well for stopping inbound traffic to your network, because
most people aren't totally defaultless, so the default route makes all traffic
valid.
It works well for outbound traffic.
On Jun 17, 2010, at 12:38 AM, Roy wrote:
On 6/16/2010 7:43 PM, Jon Lewis wrote:
On Thu,
I would say partitioning into two AS's like this is not a good thing. I
wouldn't consider it a valid design myself, and would avoid it if possible.
If one of the AS's that is announcing the block, originates any traffic into
the other AS for that block, the traffic will drop. I realize this
AS to announce from.
Brian
On Jun 7, 2010, at 5:05 PM, Brian Feeny wrote:
I would say partitioning into two AS's like this is not a good thing. I
wouldn't consider it a valid design myself, and would avoid it if possible.
If one of the AS's that is announcing the block, originates any
I don't think this is the appropriate list for asking a question about a
problem with telnet to a sco box. I don't understand why you think service
tcp-keepalives-in/out has any effect on traffic to and from a host to a SCO
box. This command is for traffic to and from the router itself.
There are alot more questions that need to be asked. Like how much address
space do you have to announce? What routes are you getting from each ISP?
Assuming you are an end user, and knowing the very limited information I know
at this point, I would make sure that these two routers LAN
Its also possible there are STP issues, so check where you roots are for the
vlans and make sure they are deterministically set.
Brian
On Mar 18, 2010, at 11:12 AM, Brielle Bruns wrote:
Dennis,
In large installations, I've always found it helpful when diagnosing LAN
issues to isolate
On Mar 12, 2010, at 4:34 PM, Kevin Loch wrote:
Axel Morawietz wrote:
Am 12.03.2010 17:03, schrieb Nathan:
[...] Its
amazing how prolific 1.x traffic is.
one reason might also be, that at least T-Mobile Germany uses 1.2.3.*
for their proxies that deliver the content to mobile phones.
And
So who is going to be the first to deploy these?
http://newsroom.cisco.com/dlls/2010/prod_030910.html
- Download the entire Library of Congress in just over 1 second
- Stream every motion picture ever created in less than four minutes
If nothing else you gotta love the Cisco Marketing
Yes, and their stock price dipped today after the news release actually hit.
So remember people, buy on rumor, sell on news.
Brian
On Mar 9, 2010, at 3:41 PM, Express Web Systems wrote:
Wow what?
Is there anything in the CRS-3 that competitors are not shipping _today_?
If you look
If you are getting Cisco hardware with configs on it or crashfiles, etc. Then
no it is NOT new equipment. Who are you buying from? Are they a Gold partner
on Cisco's partner locator? If not, then I have seen some seedy things, and of
course i have seen seedy things with Gold partners too, I
saved paper, ink and millions of trees
From: Brian Feeny [mailto:bfe...@mac.com]
Sent: Thu 3/4/2010 3:05 PM
To: Kaveh .
Cc: nanog@nanog.org
Subject: Re: Cisco hardware question
If you are getting Cisco hardware with configs on it or crashfiles, etc.
Then no it is NOT new
On most transactions, good reputable cisco partners are making about 3% on the
front end. Most good partners make their money off services, and they hire
highly trained engineers to deliver projects. Cisco hardware is like any other
retail business, there is not deep margins. So trying to
just an FYI they are down for a week or so while they relocate that
list serv, suppose to be back up in about a week.
Brian
On Dec 18, 2009, at 9:19 AM, Mikael Abrahamsson wrote:
On Fri, 18 Dec 2009, Mehmet Akcin wrote:
Hello there..
I am looking to sell and buy some used hardware,
Can anyone recommend a good tool for spanning tree visualization? I
am needing to get a good visual depiction of forwarding for many
vlans, across 4 core switches.
Two of them are CatOS, 2 are IOS, root is different for many of the
vlans, lots of port costing in place, in other words it
something that can do it.
Brian
On Nov 30, 2009, at 2:15 PM, Will Clayton wrote:
Graphviz?
On Mon, Nov 30, 2009 at 11:07 AM, Brian Feeny bfe...@mac.com wrote:
Can anyone recommend a good tool for spanning tree visualization? I
am needing to get a good visual depiction of forwarding for many
You should make sure that any links that go between devices have trust
set. In your case if your doing DSCP,
then make sure each link that goes between devices which must carry
tagged packets have trust dscp set.
Brian
On Nov 12, 2009, at 5:11 AM, Bogdan wrote:
hello
i am playing with
What I am gathering is that you are looking to by a off brand switch?
If this is the case, then I would argue reliability and speed aren't
important to you, but rather price, so go for what you can afford I
guess.
If you lack the knowledge to purchase a switch or test it properly, I
I have used the 7304 in the past and was happy with it. In fact I
still have a 6-port DS3 module for a 7304 which I need to find a home
for if anyone has the need.
The 7304 originally had its own specific modules that went into it.
But they also sell carrier card for it so you can use
Honestly, my advise is don't handle full tables in switches unless you
want to use 3bxl. Use routers, any old ISR can do 1GB memory or so
and handle the table just fine, and run you a fraction of the cost.
Keep internal routes, defaults, etc in the switching core.
Brian
On Mar 11,
Actually let me amend that and say 3800's as far as inexpensive
routers. They are basically NPE400 class devices, with alot of memory
and sufficient to handle the full table. Other router devices like
7200's etc will work fine as well.
On Mar 11, 2009, at 2:29 PM, Brian Feeny wrote
Can you elaborate a bit on your question? The fastest Gig switches
can do 1GB full speed on the port. There are many that can do that.
Do you have a particular density you need to do full speed with? Any
particular features? Are you looking at any particular models now, in
others words
Is anyone aware of a large (preferably tier 1 or tier 2) carrier that
has a solid network that supports T.38 fax on-ramp and off-ramp
services?
I have a client that needs to originate and terminate several DS3's
worth of T.38 fax traffic and is trying to find a carrier that
supports this.
OmniGraffle all the way
On Feb 11, 2009, at 8:12 AM, Malte von dem Hagen wrote:
Mathias Wolkert wrote:
I'd like to know what software people are using to document networks.
Visio is obvious but feels like a straight jacket to me.
I liked netviz but it seems owned by CA and unsupported
I have the need to stress test a LAN and WAN. The primary concern is
the WAN which is at most OC-3. The LAN would be an additional bonus
if I could do that as well.
I am familiar with tools such as those from Spirent and IXIA which are
very expensive. I was wondering if someone has had
3845 is plenty powerful, its the equivalent of an NPE-400 basically,
but you should plan on 512MB minimum with full BGP, so that you make
sure you have room for other things as well on the router.
Its not linear of course, since there is alot of redundant information
with multiple BGP
And another one, that I believe is a commercial product:
http://www.solarwinds.com/products/lansurveyor/
On Oct 15, 2008, at 12:29 PM, Bill Woodcock wrote:
On Wed, 15 Oct 2008, Colin Alston wrote:
I'm considering trying to come up with some means to automatically
detect
a networks
On Sep 3, 2008, at 8:36 PM, Jo Rhett wrote:
That's one hell of a caveot, given that you always want strict on
your customers and loose on your transit links.
Personally I have always avoided combining customers and transit
providers on the same routers in ISP environments.
Brian
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