Will Sorry for the delay. Work &family issues came first. There will be only a few ips needed per site. All of the responses on the list have been very helpful. I have enough info now to actually speak intelligently with the team that needs to do this.
Will, I will get with you offline if i have more questions , which i know i will On Monday, February 23, 2015, Will Dennis <wden...@nec-labs.com> wrote: > Hi John, > > > > The first question is, how big of an IP range (per site) do you need to > establish for each “LOM” (IPMI) subnet. Figure that out first (let’s say > you need >= 62 host IPs per site, then I’d go with a /26 mask (i.e. > 255.255.255.192) per subnet. Then, if you want to have all the blocks > contiguous, I’d take the number of sites (you said 17) times the /26 block > size, and allocate the smallest block that fits the IP range (this would be > 32 /26’s, which is a /23; if you could get by with only 16 contiguous > subnets, then you could use a /24. (anotherwords, supernetting is built on > an exponential multiple of the block size.) Then yout route between the > subnets. > > > > I’d also map each layer-3 subnet to a layer-2 VLAN (or physical routed > segment); if you can’t for some reason do that, you **can** map 2-more IP > subnets to a single VLAN, but because of broadcast traffic bandwidth > issues, etc., this is frowned upon. (But sometimes due to architecture, you > have to do it.) > > > > Ping me offline if you’d like further detail... > > > > Will > > > > *From:* tech-boun...@lists.lopsa.org > <javascript:_e(%7B%7D,'cvml','tech-boun...@lists.lopsa.org');> [mailto: > tech-boun...@lists.lopsa.org > <javascript:_e(%7B%7D,'cvml','tech-boun...@lists.lopsa.org');>] *On > Behalf Of *john boris > *Sent:* Friday, February 20, 2015 1:56 PM > *To:* Lynda > *Cc:* tech@lists.lopsa.org > <javascript:_e(%7B%7D,'cvml','tech@lists.lopsa.org');> > *Subject:* Re: [lopsa-tech] A question on routing settings > > > > Lynda, > > Yes it is an example. We are 172.31.xx.xx. I was trying to do this and > started using 10.10.xx.xx in my example and then saw I had things > mismatched. But we are private at 172.31.xx.xx and not infringing on AT&T's > network > > > > On Fri, Feb 20, 2015 at 1:46 PM, Lynda <shr...@deaddrop.org > <javascript:_e(%7B%7D,'cvml','shr...@deaddrop.org');>> wrote: > > On 2/20/2015 10:16 AM, john boris wrote: > > Here at $WORK I was approached with a problem. Our systems are on a private > network 172.xx.xx.xx) and then we have other networks nat'd ay various > points. I handle one portion of the entire Network. Each of our sites are > on their own set of subnets. The team I am on wants to use a specific set > of IPS for the Lights out port on a series of servers that will be on 17 > different subnets. > > > > Not sure if I am explaining this properly. > Example: Site 1 has its own subnet 172.10.10.xx Netmask 255.255.254.0 and > its router is 172.10.10.1 which talks via VPN to our central site. For > clarity we will say the central site is at 172.10.5.xx with a netmask of > 255.255.248.0 > > > This is right where I quit reading. I'm a bit concerned, since > 172.10.10.x belongs to AT&T, and is not part of the delegation for > "private" use that is within 172.16.0.0 - 172.31.0.0 (with subnet > mask of 255.240.0.0). (Actually, AT&T owns 172.0.0.0 to 172.15.255.255). > > http://vlsm-calc.net/ipclasses.php > > I'm hoping that your examples were just free hand, and that it's not > what you meant. In answer to your more specific question, I think they > *will* be able to see those addresses (whether or not you're within the > 172.16.x.x block or not). > > I'm sure I've just misunderstood something... > > -- > Or set upon a golden bough to sing > To lords and ladies of Byzantium > Of what is past, or passing, or to come. > (Wm Butler Yeats) > > > _______________________________________________ > Tech mailing list > Tech@lists.lopsa.org > <javascript:_e(%7B%7D,'cvml','Tech@lists.lopsa.org');> > https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech > This list provided by the League of Professional System Administrators > http://lopsa.org/ > > > > > > -- > > John J. Boris, Sr. > > Head Freshmen Football Coach > > Camden Catholic High School > -- John J. Boris, Sr. Head Freshmen Football Coach Camden Catholic High School
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