[MLB-WIRELESS] OSPF BGP

[Brenton D.]

Yeah, We had a meeting this morning.


ivile01 at yahoo.com.au | ivile at ivile.bur.st
http://bur.st/~ivile (waveguides) | http://ivile.bur.st | 
http://ivile.bur.st/ivile/64/ (my car)
http://www.melbourne.wireless.org.au/users/?ivile
----- Original Message ----- 
From: "Ryan Abbenhuys" <sneeze at alphalink.com.au>
To: <melbwireless at wireless.org.au>
Sent: Wednesday, June 22, 2005 3:03 PM
Subject: Re: [MLB-WIRELESS] OSPF BGP


>
> Did I miss something?  Was the decision to use OSPF scrapped in favour of
> BGP?
>
>
>>http://www.melbourne.wireless.org.au/wiki/?BGP
>>
>>
>>ivile01 at yahoo.com.au | ivile at ivile.bur.st
>>http://bur.st/~ivile (waveguides) | http://ivile.bur.st |
>>http://ivile.bur.st/ivile/64/ (my car)
>>http://www.melbourne.wireless.org.au/users/?ivile
>>----- Original Message ----- 
>>From: "Brenton D." <ivile01 at yahoo.com.au>
>>To: "Dan Flett" <conhoolio at hotmail.com>; "'Nigel'" <thenigel at hotmail.com>;
>
>><melbwireless at wireless.org.au>
>>Sent: Wednesday, June 22, 2005 2:10 PM
>>Subject: Re: [MLB-WIRELESS] OSPF BGP
>>
>>
>>> Ill put up a really basic sample config. On the Wiki
>>> And ill have a part where you can add your own asn.
>>> I was thinking that we should have a 5 number gap between each person
> BGP
>>> asn, just in case they have more than one router(like me).
>>> so basically we have room for 1000 routers 64512 to 65534
>>> which i doubt there will be more than 50 running bgp in the near
>>> future.(as some only support ospf)
>>>
>>> so node fut would have the bgp asn 64515 (just leave the first few free)
>>>            fuu would have the bgp asn 64520
>>>            gho would have the bgp asn 64525
>>> and so on...  unless you have on the node page that they request a BGP
>>> asn(s)  from melb-wireless.
>>>
>>> ivile01 at yahoo.com.au | ivile at ivile.bur.st
>>> http://bur.st/~ivile (waveguides) | http://ivile.bur.st |
>>> http://ivile.bur.st/ivile/64/ (my car)
>>> http://www.melbourne.wireless.org.au/users/?ivile
>>> ----- Original Message ----- 
>>> From: "Dan Flett" <conhoolio at hotmail.com>
>>> To: "'Brenton D.'" <ivile01 at yahoo.com.au>; "'Nigel'"
>>> <thenigel at hotmail.com>; <melbwireless at wireless.org.au>
>>> Sent: Wednesday, June 22, 2005 1:48 PM
>>> Subject: RE: [MLB-WIRELESS] OSPF BGP
>>>
>>>
>>>> So, Brenton, cutting it right down, your BGP file looks like this:
>>>>
>>>> !
>>>> hostname bgpd
>>>> password XXXXX
>>>> enable password XXXXX
>>>> !
>>>> router bgp 7675
>>>> bgp router-id 10.10.129.145
>>>> redistribute ospf
>>>> redistribute connected
>>>> !
>>>> ! DAN's COMMENTS: you probably don't need redistribute connected as
>>>> you've
>>>> already declared your network
>>>> ! In Quagga the routing protocol automatically redistributes any routes
>>>> declared with the network statement
>>>> ! Also, to be precise, the melbourne wireless network is entirely
> inside
>>>> the
>>>> 10.10.0.0/16 supernet
>>>> !
>>>> network 10.0.0.0/8
>>>> neighbor 10.10.128.97 remote-as 7676
>>>> !
>>>> access-list all permit any
>>>> ! You probably don't need this access-list because you haven't
> specified
>>>> any
>>>> route-maps
>>>> log stdout
>>>>
>>>>
>>>> That's as simple as a BGP file gets really - and if we weren't using
> OSPF
>>>> you could get rid of the redistribute ospf statement too.  You only
> need
>>>> to
>>>> add neighbor lines each time you directly connect to a new BGP
> neighbor.
>>>> BGP gets complicated when you have multiple routes/routers/subnets
> within
>>>> the one AS.  If every node has their own AS it's quite easy.
>>>>
>>>> I'm considering writing a set of scripts that will automagically create
>>>> Quagga/BGP config files from NVRAM variables or a very basic config
> file,
>>>> and that will exchange AS information with neighbors via DHCP.  So
>>>> basically
>>>> you won't have to do anything (if you don't want to) except enter your
> IP
>>>> and AS addresses/numbers to start with.
>>>>
>>>> I'm thinking of running BGP at node GHO alongside OSPF.  We should let
>>>> GHO
>>>> settle and make sure it's stable for a few weeks before we try
> anything,
>>>> but
>>>> I think it would be worth testing.
>>>>
>>>> How about someone create a BGP-Trial wiki page where we write down our
> AS
>>>> numbers for our nodes?  It should just be for testing, but it means we
>>>> can
>>>> test BGP in our own local clusters.  It doesn't matter if ASNs within a
>>>> cluster are contiguous or not - that's the beauty of BGP - you can
> choose
>>>> any number you want, so long as it isn't someone else's.  We need to
>>>> choose
>>>> our numbers from the IANA Private Use ASN space - being 64512 to 65534,
>>>> inclusive.
>>>>
>>>> Cheers,
>>>>
>>>> Dan
>>>
>>>
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>>
>>
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