Hi,
On 7 Jun 2010, at 23:02, Joel M Snyder joel.sny...@opus1.com wrote:
On 6/7/10 11:51 PM:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates
Hi,
On Tue, Jun 8, 2010 at 6:50 AM, Dale Cornman bstym...@gmail.com wrote:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates this block in BGP?
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates this block in BGP? One
of the ISP's in this case owns the block and has even provided a letter of
Should work fine.
--Original Message--
From: Dale Cornman
To: nanog@nanog.org
Subject: Strange practices?
Sent: Jun 7, 2010 5:50 PM
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
* Dale Cornman:
I had personally never heard of this and am curious if this is a
common practice as well as if this would potentially create any
problems by 2 Autonomous Systems both originating the same prefix.
The 6to4 anycast gateway RFC practically mandates this, and it does
work when
On Mon, Jun 07, 2010 at 03:50:25PM -0500, Dale Cornman wrote:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates this block in BGP?
Yes; tends to
Hve seen it a few times -- usually with enterprise customers who are
unable to manage their own routers and one ISP which has problems
configuring BGP on their client facing equipment.
Dale Cornman wrote:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2
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
Let me recant on what I said. I re-read and had myself confused (apologies).
I see that the providers are using their own AS's. I still would not do this
if it could be avoided, but the traffic won't be dropped like I had said, in
the way I was thinking.
What I was thinking was a case
It's going to show inconsistent AS which some people may not like, but
that's just ugly not broken. As the customer, it means your outgoing
path selection is probably being made on the basis of some non-global
attribute, and the return path is entirely at the mercy of your two isps...
I
On Mon, Jun 7, 2010 at 13:50, Dale Cornman bstym...@gmail.com wrote:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates this block in BGP? One
of
-Original Message-
From: Dale Cornman [mailto:bstym...@gmail.com]
Sent: Monday, June 07, 2010 2:50 PM
To: nanog@nanog.org
Subject: Strange practices?
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
On 2010.06.07 17:49, Murphy, Jay, DOH wrote:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates this block in BGP?�
As stated before...yes this
So if the enterprise loses connectivity to one of these two providers, does
the provider without working connectivity to the enterprise have mechanism in
place to cease originating the address space?
Yes, BGP updates.
~Jay Murphy
IP Network Specialist
NM State Government
IT
On 6/7/10 11:51 PM:
Has anyone ever heard of a multi-homed enterprise not running bgp with
either of 2 providers, but instead, each provider statically routes a block
to their common customer and also each originates this block in BGP?
Yes, this is common and works fine. We do it with a
On 2010.06.07 18:10, Murphy, Jay, DOH wrote:
Yes, the customer has an AS number, it's just from the private AS number
block, e.g. AS 65000..when the block is routed to the AS running BGP, it is
tagged with that ISP's public AS number, and announced to the world in this
manner.
...but the
On 2010.06.07 17:59, Murphy, Jay, DOH wrote:
So if the enterprise loses connectivity to one of these two providers, does
the provider without working connectivity to the enterprise have mechanism in
place to cease originating the address space?
Yes, BGP updates.
...again, I'm
On Mon, Jun 7, 2010 at 14:59, Murphy, Jay, DOH jay.mur...@state.nm.us wrote:
So if the enterprise loses connectivity to one of these two providers, does
the provider without working connectivity to the enterprise have mechanism in
place to cease originating the address space?
Yes, BGP
printing e-mail
-Original Message-
From: Steve Bertrand [mailto:st...@ipv6canada.com]
Sent: Monday, June 07, 2010 4:38 PM
To: Murphy, Jay, DOH
Cc: Dale Cornman; nanog@nanog.org
Subject: Re: Strange practices?
On 2010.06.07 17:59, Murphy, Jay, DOH wrote:
So if the enterprise loses
07, 2010 4:41 PM
To: Steve Bertrand
Cc: Murphy, Jay, DOH; nanog@nanog.org
Subject: Re: Strange practices?
Perhaps the providers BGP is just being fed from interface anchored static
routes which will, hopefully, drop out if the customer facing interface goes
down. Of course, this is realistic
-Original Message-
From: Bill Fehring [mailto:li...@billfehring.com]
Sent: Monday, June 07, 2010 4:42 PM
To: Murphy, Jay, DOH
Cc: Dale Cornman; nanog@nanog.org
Subject: Re: Strange practices?
On Mon, Jun 7, 2010 at 14:59, Murphy, Jay, DOH jay.mur...@state.nm.us wrote:
So if the enterprise
On 2010.06.07 18:48, Murphy, Jay, DOH wrote:
Steve,
We are obviously interpreting this in different slants.
Agreed ;)
Definition of Transit service: for example, AS200 is said to receive transit
service from, let's say AS3356, if through this connection, AS200 receives
connectivity to
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