I am thinking the multiple ASN route is the cleanest but the
idea of letting a default gateway (via static route maybe)
out the local upstream connection to reach the other site
when the backnet link is down sounds like it would work with
minimal to no headaches but it just some how seems
: Adam Greene [mailto:maill...@webjogger.net]
Sent: Saturday, June 06, 2009 8:38 AM
To: nanog@nanog.org
Subject: Re: Multi site BGP Routing design
Hi all,
We actually have a very similar setup to what Justin asked about, with the
exception that we advertise only some of our netblocks to one
To rephrase the OP's question, would it be BCP to acquire a
second ASN, and without further de-aggregating, continue
advertising each site's IP space to the DFZ, but from
dissimilar ASs as opposed to the same one?
This would definitely be the best approach. You're not introducing new IP
For a given interconnection between the upstream ISPs for the two site, once
the direct link goes down, the time required for site A to learn the new
route to site B and vice versa would be different with the different
proposed solutions, right?
Thanks and best regards
On Sat, Jun 6, 2009 at
...@gmail.com
To: nanog@nanog.org
Sent: Saturday, June 06, 2009 8:21 AM
Subject: Re: Multi site BGP Routing design
For a given interconnection between the upstream ISPs for the two site,
once
the direct link goes down, the time required for site A to learn the new
route to site B and vice versa would
We have two geographically distinct locations that currently both fall under
the same ASN.
At site 1 we have a particular set of ip networks (/20 and bigger) in use
only locally to this site
At site 2 we have a separate set of ip networks (/20 and bigger) in use only
locally to this site
Justin Krejci wrote:
If the private link between the two sites fails, will BGP allow for us to
access the IP subnets at site 2 from site 1 via the internet given that both
sites are advertising under the same ASN?
No, because your router at site 2 will not accept any prefix with its
own AS in
Once upon a time, Steve Bertrand st...@ibctech.ca said:
Unless someone else has any better advice (I'm sure they do), you will
need two separate public ASNs. Site 1 advertises it's space out of AS1,
and site 2 advertises it's space from AS2.
I don't know that it's better advice, but another
On Fri, Jun 05, 2009 at 05:50:28PM -0500, Justin Krejci wrote:
If the private link between the two sites fails, will BGP allow for us to
access the IP subnets at site 2 from site 1 via the internet given that both
sites are advertising under the same ASN?
Maybe. Especially if both sites are
to allow for that flow as well.
j.
From: Chris Adams [cmad...@hiwaay.net]
Sent: Friday, June 05, 2009 20:16
To: nanog@nanog.org
Subject: Re: Multi site BGP Routing design
Once upon a time, Steve Bertrand st...@ibctech.ca said:
Unless someone else has any better
Chuck Anderson wrote:
On Fri, Jun 05, 2009 at 05:50:28PM -0500, Justin Krejci wrote:
If the private link between the two sites fails, will BGP allow for us to
access the IP subnets at site 2 from site 1 via the internet given that both
sites are advertising under the same ASN?
Maybe.
john.herb...@ins.com wrote:
Depending on your security policies you may want to encrypt said tunnel also.
Other than that, it all depends on it all depends. For example - if you
receive / or have a default route pointing to the ISP, then the fact you have
the same AS and won't receive the
it, you're SOL.
j.
From: Chuck Anderson [...@wpi.edu]
Sent: Friday, June 05, 2009 20:33
To: nanog@nanog.org
Subject: Re: Multi site BGP Routing design
On Fri, Jun 05, 2009 at 05:50:28PM -0500, Justin Krejci wrote:
If the private link between the two sites fails
.
From: Steve Bertrand [st...@ibctech.ca]
Sent: Friday, June 05, 2009 20:40
To: Herbert, John
Cc: cmad...@hiwaay.net; nanog@nanog.org
Subject: Re: Multi site BGP Routing design
john.herb...@ins.com wrote:
Depending on your security policies you may want to encrypt said tunnel also.
Other than
On Fri, Jun 05, 2009 at 07:40:15PM -0500, john.herb...@ins.com wrote:
This is a good concept but if the ISP route is a Juniper then as I
recall by default it looks ahead, sees the as-path routing loop if
it were to send it to the other router, and doesn't send it. So
while you might be able
Chuck Anderson wrote:
On Fri, Jun 05, 2009 at 07:40:15PM -0500, john.herb...@ins.com wrote:
This is a good concept but if the ISP route is a Juniper then as I
recall by default it looks ahead, sees the as-path routing loop if
it were to send it to the other router, and doesn't send it. So
On 6/5/09 4:42 PM, Steve Bertrand st...@ibctech.ca wrote:
Justin Krejci wrote:
If the private link between the two sites fails, will BGP allow for us to
access the IP subnets at site 2 from site 1 via the internet given that both
sites are advertising under the same ASN?
No, because your
Randy Bush wrote:
Have you ever known an ISP to not co-operate when it comes to
requesting a BGP session?
yes. this problem is rampant with colonialist telcos in the poorer
countries.
Yeah, well, I don't live in a poorer country, and I deal with it here.
*cough*
Steve
smime.p7s
Have you ever known an ISP to not co-operate when it comes to
requesting a BGP session?
yes. this problem is rampant with colonialist telcos in the poorer
countries.
Yeah, well, I don't live in a poorer country, and I deal with it here.
*cough*
you asked a question. you are not required
Have you ever known an ISP to not co-operate when it comes to
requesting a BGP session?
yes. this problem is rampant with colonialist telcos in the poorer
countries.
Yeah, well, I don't live in a poorer country, and I deal with it here.
*cough*
you asked a question. you are not required
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