Ken Gilmour wrote:
Hi Adel
There are companies like packet exchange (www.packetexchange.net)
(whom i have personally used) who will do all of the legwork for you,
such as applying for the ASN, address space, transit agreements, and
get the tail connections directly to your building. You just need to
pay them and buy the equipment (which they can also provide). Probably
easier in the long run.
Sure, if you want to hand over your entire profit margin to a 3rd party.
Do you really want to give away the keys to your business, and rely
entirely upon a third party organisation? Better to acquire the skills
which are vital to your organisation yourself.
NOTE: I am not an employee, or paid affiliate of packet exchange... I
have used them for services and am promoting them due to my own good
experiences with their services.
I used to work for them. Then as now, I honestly can see little purpose
in their productset.
adam.
2009/11/8 <a...@baklawasecrets.com>:
Thanks Seth and James,
Things are getting a lot clearer. The BGP multihoming solution sounds like
exactly what I want. I have more questions :-)
Now I suppose I would get my allocation from RIPE as I am UK based?
Do I also need to apply for an AS number?
As the IP block is "mine", it is ISP independent. i.e. I can take it with me
when I decide to use two completely different ISPs?
Is the obtaining of this IP block, what is referred to as PI space?
Of course internally I split the /24 up however I want - /28 for untrust range
and maybe a routed DMZ block etc.?
Assuming I apply for IP block and AS number, whats involved and how long does
it take to get these babies?
I know the SSG550's have BGP capabilites. As I have two of these in HA mode,
does it make sense to do the BGP on these, or should I get dedicated BGP
routers?
Fixing the internal routing policy so traffic is directed at the active BGP
connection. Whats involved here, preferring one BGP link over the other?
Thanks again, I obviously need to do some reading of my own, but all the
suggestions so far have been very valuable and definitely seem to be pointing
in some
fruitful directions.
Adel
On Sun 6:31 PM , "James Hess" mysi...@gmail.com sent:
On Sun, Nov 8, 2009 at 11:34 AM, <adel@
baklawasecrets.com> wrote:[..]
connections from different providers I would
still have issues. So> I guess that if my primary Internet goes down I
lose connectivity> to all the publicly addressed devices on that
connection. Like> dmz hosts and so on. I would be interested
to hear how this> can be avoided if at all or do I have to use the
same provider.
You assign multi-homed IP address space to your publicly addressed
devices,which are not specific to either ISP. You announce to both ISPs, and
you accept some routes from both ISPs.
You get multi-homed IPs, either by having an existing ARIN allocation,
or getting a /22 from ARIN (special allocation available for
multi-homing), or ask for a /24 from ISP A or ISP B for
multihoming.
If Link A fails, the BGP session eventually times out and dies: ISP
A's BGP routers withdraw the routes, the IP addresses are then
associated only with provider B.
And you design your internal routing policy to direct traffic
within your network to the router with an active BGP session.
Link A's failure is _not_ a total non-event, but a 3-5 minute partial
disruption, while the BGP session times out and updates occur in other
people's routers, is minimal compared to a 3 day outage, if serious
repairs to upstream fiber are required.
--
-J
