[j-nsp] [Fwd: Re: BGP peer's]

[a.r.isnaini.rangkayo.st]

Hi,


My understanding is that your international bandwidth cost you more than
local peers.
And local peering is free by exchanging your routes privately using
private peer.

What I have done in my region for : [we have local internet exchange
which is free]

A. Outgoing Traffic :
	- Receive All Local Route & Set local local preference while receiving
all route from upstream ISP or
	- Just Receive All Local Route & Ask your International ISP to Inject a
default route by BGP
           This would give more space on your memory & a simple config.
B. Incoming Traffic :
	- Advertise longer prefix to your local exchange / private peers
           And ask them to be very careful not to re-advertise your
route unless for local exchange route only.
           Or using community which both of you set it up.
	- Advertise same prefixes with prepending prefixes to your ISP Upstream

Please be careful if Internet routes & local routes exchanging in one
router, wrong configuration might cause your router to be used as
'unwanted' traffic transit.

rgs
a. rahman isnaini rangkayo sutan

Gregory Agerba wrote:
> Accepting the idea that you are having twice the same ISP on two different
> session but at the same location for redundancy purposes only, you definetly
> wants to have:
> 
> 1. Local preference set to a higher value on your primary link.
> 2. Preprend 3 times with your own AS the IN/OUT paths
> This way, you have two links always up and running, but you always use the
> primary and if you preprend it 3 times on the OUT direction, it is really
> really unlikely that someone will prefer your worst .
> Additionaly, if your primary session (-link) goes down, the BGP session will
> flap and the second route will become the new *best* route (as the other one
> will simply disapear) and your traffic will flow thru your second session
> (-link) and this will revert when your main session (-link) will come back
> to working state.
>  -- Gregory
> 2010/1/13 Onam Rubio <onamrubio at hotmail.com>
> 
>> In my country are 5 ISP and to save internet traffic we make local BGP
>> peering.
>> Before this I have a BGP session for internet redundancy with one of the 5
>> ISP's.
>>
>>
>>> From: sfouant at shortestpathfirst.net
>>> To: onamrubio at hotmail.com; juniper-nsp at puck.nether.net
>>> Subject: RE: [j-nsp] BGP peer's
>>> Date: Wed, 13 Jan 2010 10:41:37 -0500
>>>
>>>> -----Original Message-----
>>>> From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-
>>>> bounces at puck.nether.net] On Behalf Of Onam Rubio
>>>> Sent: Wednesday, January 13, 2010 10:27 AM
>>>>
>>>> I have 2 BGP session with the same ISP but one of this  one is for the
>>>> local BGP to save internet traffic, and the other one is for internet
>>>> redundancy I need to have but session running but my advertisement goes
>>>> for both of them to internet. Manually y can reject the networks to my
>>>> uptream providers, Is there a way to do it automatically?
>>> I'm not sure I fully understand your question.  Are you saying you only
>> want
>>> to advertise routes to the Primary BGP peer, and only advertise routes to
>>> the Secondary in the event of a failure of the Primary peer?
>>>
>>> Stefan Fouant, CISSP, JNCIE-M/T
>>> www.shortestpathfirst.net
>>> GPG Key ID: 0xB5E3803D
>>>
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