RE: {bb} DHCP and BB

[Henrik Olsen <henrik@iaeste.dk>]

On Tue, 28 Sep 1999, Charles Gillanders wrote:
> Well I for one would like the option of using addresses rather than names, I
> appreciate
> the issue of dependancy but frankly for our network, if the DNS is broke,
> then it's all
> broke anyway.  Could we do this with some sort of variable in bb-network.sh,
> set to use
> IP address by default and could be administratively modified to use names?
I would suggest switching to name-based ping on 0.0.0.0 addresses only,
and keep the ip-based ping for the rest, since having correct connectivity
shown is a very large help in pinpointing the exact cause of the outage.

Having every single net test on every host go red because your dns dies
does not give you a lot of help in figuring out what the problem is,
as opposed to eg. if all your static hosts still have green conn columns,
that's a good indication that you shouldn't start debugging the routers.:)

> 
> Charles
> 
> -----Original Message-----
> From: Sean MacGuire [mailto:sean@www.maclawran.ca]
> Sent: 28 September 1999 14:23
> To: bb@bb4.com
> Subject: Re: {bb} DHCP and BB
> 
> 
> > Hi all, 
> > 
> > I'm trying to figure out what the deal is with BB and DHCP, I can see 
> > in the code that there seem to have been some attempts in the past to 
> > deal with dynamic hosts, but I can't quite figure out what the current 
> > state of play is.  
> 
> BB supports DHCP everywhere except 'ping'.  (i.e. BBDISPLAY and BBPAGER
> can be dhcp addresses, etc).
> 
> > The nearest I can figure out is that currently if I put in 0.0.0.0 for 
> > the IP address and list a host name then BB will work but won't do a 
> > connectivity test to that host.
> 
> At the moment (actually for a long time now), we only ping IP addresses
> (and not names).  This means that in the case of DHCP (0.0.0.0) - the
> ping test is disabled automatically.
> 
> Problem was based on the idea "what if the DNS is done" - we're adding
> a dependancy where none is needed (this combined with the ability to
> use completely bogus names in the bb-hosts file), meant that in order
> to avoid confusion, it was just disallowed.  Also since a name can return
> more than one IP address, the results can be misleading as well.
> 
> > Does anyone have any ideas on what mods might be necessary to get BB to
> ping
> > based on hostname rather than IP address.  Then I could enter in the names
> > of my DHCP assigned machines and not particularly care about their current
> > IP address.
> 
> The ping code is in bb-network.sh... does anyone out there have an opinion
> on whether to bring this back or not?
> -- 
> Sean MacGuire, Reality Engineering 		the BB Ministry of Truth
> sean@bb4.com 					http://www.bb4.com
> +1 514 630 6415
> 
> 		"Looking down the barrel of another day"
> -
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-- 
Henrik Olsen,  Dawn Solutions I/S       URL=http://www.iaeste.dk/~henrik/
 `Can you count, Banjo?' He looked smug. `Yes, miss. On m'fingers, miss.'
 `So you can count up to ...?' Susan prompted.
 `Thirteen, miss,' said Banjo proudly.         Terry Pratchett, Hogfather


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