Good morning all. I was wondering if someone could lend me a little help
about engineering OSPF in the backbone for an ISP network. I just had a
couple of questions and hopefully someone can give me some guidanceĀ
or even
some CCO links with some specific examples or better yet any material
anywh
> Say, for example, that a customer has a small block of IP's and a
> distribution router knows where that block is, via a connected route, like
a
> /30 on a serial link. But later down the line the customer requests an
> additional block of 64 IP addresses, what is the best way to send this
bloc
Rather than run OSPF to customers, it is generally much better to have
them use a default route to the ISP and for the ISP to run static routes to
the customer. OSPF to the customer is a huge land mine for the ISP and
should be avoided in almost every case.
Don
""Chris Headings"" wrote in
Great...
So it looks like I would then use the "redistribute static subnets" as well
as the "redistribute connected subnets" command within the OSPF process to
make sure ALL ospf enabled routers would know how to reach that specifc,
statically routed/connected, destination?
Chris
Message Poste
At 2:58 PM + 9/30/02, Don wrote:
>Rather than run OSPF to customers, it is generally much better to have
>them use a default route to the ISP and for the ISP to run static routes to
>the customer. OSPF to the customer is a huge land mine for the ISP and
>should be avoided in almost every case
ry Network http://www.illinois.net
(217) 557-6555
> -Original Message-
> From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]]
> Sent: Monday, September 30, 2002 11:37 AM
> To: [EMAIL PROTECTED]
> Subject: Re: OSPF for ISPs [7:54540]
>
>
> At 2:58 PM + 9/30/02, Don
ward C. Berkowitz [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, September 30, 2002 11:37 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: OSPF for ISPs [7:54540]
> >
> >
> > At 2:58 PM + 9/30/02, Don wrote:
> > >Rather than run OSPF to customers, it is generally
""Mike Bernico"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I'm not sure I'm in complete agreement. The network I work for has
several
> distribution routers that contain around 1000 T1 speed customers. If we
> were to static route each of their networks it would add about
PROTECTED]
Subject: Re: OSPF for ISPs [7:54540]
Interesting. I don't work for an ISP bt have worked with many and I have
only ran into one that ran an IGP with it's customers and I was suprised.
My ancedotal evidence suggests that the vast majority either run BGP or
statics to announce c
Howard,
Is there an audio tape that goes with the slides. If so, I'd being
willing to
pay so I could show this presentation to my CCNP students, including
the "shameless plug." BTW, liked your concise explanation of CIDR
vs VLSM.
Prof. Tom Lisa, CCAI
Community College of Southern Nevada
Cisco
>Howard,
>
>Is there an audio tape that goes with the slides. If so, I'd being
>willing to
>pay so I could show this presentation to my CCNP students, including
>the "shameless plug." BTW, liked your concise explanation of CIDR
>vs VLSM.
>
>Prof. Tom Lisa, CCAI
>Community College of Southern Nev
l Message-
> > From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, September 30, 2002 11:37 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: OSPF for ISPs [7:54540]
> >
> >
> > At 2:58 PM + 9/30/02, Don wrote:
> > >Rather than run O
I work for an ISP and we simply run a static route of those IPs for the
customer and just redist. static routes via EIGRP. Updates are usually not
affected much, either, as we have made sure that any subnets that we route
to a customer already exist on that router, therefore router summarization
t
John,
""John Hutchison"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I work for an ISP and we simply run a static route of those IPs for the
> customer and just redist. static routes via EIGRP.
I guess you mean redistribute the customer static routes into BGP?
>Updates are
gt;
>> YMMV
>> Mike
>>
>> ---
>> Mike Bernico [EMAIL PROTECTED]
>> Illinois Century Network http://www.illinois.net
>> (217) 557-6555
>>
>>
>> > -Original Message-
>> > Fro
At 03:07 PM 9/30/2002 +, Russell Heilling wrote:
> > Say, for example, that a customer has a small block of IP's and a
> > distribution router knows where that block is, via a connected route,
like
>a
> > /30 on a serial link. But later down the line the customer requests an
> > additional bl
At 04:05 PM 9/30/2002 +, Chris Headings wrote:
>Great...
>
>So it looks like I would then use the "redistribute static subnets" as well
>as the "redistribute connected subnets" command within the OSPF process to
>make sure ALL ospf enabled routers would know how to reach that specifc,
>statica
; > Illinois Century Network http://www.illinois.net
> > (217) 557-6555
> >
> > > -Original Message-
> > > From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]]
> > > Sent: Monday, September 30, 2002 11:37 AM
> > > To: [EMAIL PROTECTED]
> &
What about using default routes at the customer sites?
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Peter van Oene
Sent: Friday, October 04, 2002 5:17 AM
To: [EMAIL PROTECTED]
Subject: Re: OSPF for ISPs [7:54540]
At 07:12 PM 9/30/2002 +, MADMAN
the customer sites?
>
>-Original Message-
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
>Peter van Oene
>Sent: Friday, October 04, 2002 5:17 AM
>To: [EMAIL PROTECTED]
>Subject: Re: OSPF for ISPs [7:54540]
>
>
>At 07:12 PM 9/30/2002 +, MADMA
20 matches
Mail list logo
