Hey All
Quick question: do you allow/run routing protocols between your (isp-) network and your customer? If so: which protocols? If not: what reasons do you tell the customer?
In particular I am interested to know about setups when they want to announce the prefix/subnet you assigned them from your PA-space back to you because they want to run redundant routers.
The setup would probably look like this:
Customer Subnet 10.0.0.0/27 / \ | | [customer router a] - <routing protocol x> - [customer router b] | | <routing protocol y> <routing protocol y> | | [isp router a] - <routing protocol z> - [isp router b] | | \ / ISP Network 10.0.0.0/8
hi Roman,
I would propose BGP on CE-PE link, with some BGP community policy. Then the customer would send you community strings which govern
local preference and announcements of those prefixes.
I made several such policy implementations based on Easynet BGP policy: http://lg.easynet.net/bgppolicy.php This is a very detailed document, and it covers all possible needs for an SP. Typically you only need to implement a part of it.
cheers, stan
----- Original Message -----
From: Roman Hochuli roman.hochuli@nexellent.ch To: "swinog@swinog.ch" swinog@swinog.ch Cc: Sent: Friday, November 2, 2012 9:56 AM Subject: [swinog] routing protocols between isp and customer?
Hey All
Quick question: do you allow/run routing protocols between your (isp-) network and your customer? If so: which protocols? If not: what reasons do you tell the customer?
In particular I am interested to know about setups when they want to announce the prefix/subnet you assigned them from your PA-space back to you because they want to run redundant routers.
The setup would probably look like this:
Customer Subnet 10.0.0.0/27 / \ | | [customer router a] - <routing protocol x> - [customer router b] | | <routing protocol y> <routing protocol y> | | [isp router a] - <routing protocol z> - [isp router b] | | \ / ISP Network 10.0.0.0/8
-- Best regards, Roman Hochuli Operations Manager
nexellent ag Saegereistrasse 33 CH-8152 Glattbrugg
Phone: +41 44 872 20 00 Fax: +41 44 872 20 01 URL: www.nexellent.ch X-NCC-RegID: ch.nexellent
Imagination is the one weapon in the war against reality. -- Jules de Gaultier
swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
Hello Stan
I would propose BGP on CE-PE link, with some BGP community policy.
As far as I understand this document is talking about bgp-setups as a whole. I would be more interested to hear if they would break out a subnet out of their PA-allocation and accept that back over <insert routing protocol of choice here> from their customer.
On 2012-11-02 11:41, Roman Hochuli wrote:
Hello Stan
I would propose BGP on CE-PE link, with some BGP community policy.
As far as I understand this document is talking about bgp-setups as a whole. I would be more interested to hear if they would break out a subnet out of their PA-allocation and accept that back over <insert routing protocol of choice here> from their customer.
I've seen that kind of setup (give a chunk of PA to customer, let customer announce it to the ISP in question so that customer can be multihomed)) in various places. The choice of routing protocol just depends on what devices are connected to either side. The preference for it then typically is OSPF, BGP and last RIP and friends.
Greets, Jeroen
sure, they announce a part of your PA superblock, and you route it in internal BGP, and just make sure you don't announce longer prefixes to the outside world. And this community concept is actually helping to do this in an efficient manner.
Pretty much everyone is doing that.
----- Original Message -----
From: Roman Hochuli roman.hochuli@nexellent.ch To: swinog@lists.swinog.ch Cc: Sent: Friday, November 2, 2012 11:41 AM Subject: Re: [swinog] routing protocols between isp and customer?
Hello Stan
I would propose BGP on CE-PE link, with some BGP community policy.
As far as I understand this document is talking about bgp-setups as a whole. I would be more interested to hear if they would break out a subnet out of their PA-allocation and accept that back over <insert routing protocol of choice here> from their customer.
-- Best regards, Roman Hochuli Operations Manager
nexellent ag Saegereistrasse 33 CH-8152 Glattbrugg
Phone: +41 44 872 20 00 Fax: +41 44 872 20 01 URL: www.nexellent.ch X-NCC-RegID: ch.nexellent
Imagination is the one weapon in the war against reality. -- Jules de Gaultier
swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
Hi Roman,
Most ISPs would use BGP and typically it would look like this:
ISP-----iBGP_AS100-----ISP | | | | eBGP eBGP | | | | CSR--iBGP_AS65532--CSR Regards, Fadi
On Fri, Nov 2, 2012 at 9:56 AM, Roman Hochuli roman.hochuli@nexellent.chwrote:
Hey All
Quick question: do you allow/run routing protocols between your (isp-) network and your customer? If so: which protocols? If not: what reasons do you tell the customer?
In particular I am interested to know about setups when they want to announce the prefix/subnet you assigned them from your PA-space back to you because they want to run redundant routers.
The setup would probably look like this:
Customer Subnet 10.0.0.0/27 / \ | |[customer router a] - <routing protocol x> - [customer router b] | | <routing protocol y> <routing protocol y> | | [isp router a] - <routing protocol z> - [isp router b] | | \ / ISP Network 10.0.0.0/8
-- Best regards, Roman Hochuli Operations Manager
nexellent ag Saegereistrasse 33 CH-8152 Glattbrugg
Phone: +41 44 872 20 00 Fax: +41 44 872 20 01 URL: www.nexellent.ch X-NCC-RegID: ch.nexellent
Imagination is the one weapon in the war against reality. -- Jules de Gaultier
swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
Hello Fadi
Thank you for your reply.
Most ISPs would use BGP and typically it would look like this:
That's basically the setup I described. Still remaining my question: which ISPs run setups like that in CH?
Hi Roman,
I cannot speak for others but I would imagine that any ISPs should be willing to run such setups, at least I can confirm in the ISP where I work we do this all the time, for both PA and PI.
Regards, Fadi
On Fri, Nov 2, 2012 at 11:44 AM, Roman Hochuli roman.hochuli@nexellent.chwrote:
Hello Fadi
Thank you for your reply.
Most ISPs would use BGP and typically it would look like this:
That's basically the setup I described. Still remaining my question: which ISPs run setups like that in CH?
-- Best regards, Roman Hochuli Operations Manager
nexellent ag Saegereistrasse 33 CH-8152 Glattbrugg
Phone: +41 44 872 20 00 Fax: +41 44 872 20 01 URL: www.nexellent.ch X-NCC-RegID: ch.nexellent
Imagination is the one weapon in the war against reality. -- Jules de Gaultier
-
Fadi Bushnaq -
Jeroen Massar -
Roman Hochuli -
Stanislav Sinyagin