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Private Vlan, Community Vlan and Isolated VLAN Questions - Page 2

post #11 of 26
Quote:
Originally Posted by Nivis Tigridis View Post
What the 2 last post say is correct if 1 VLAN = 1 IP range or subnet; in my case ALL the VLAN will have the SAME IP range and subnets.
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post #12 of 26
Thread Starter 
1- I don't have / want multiple router on the setup (home grade at this point).

2- I want to prevent the "guest" to have access to some part of the network but still give them DHCP & internet access + access to the PCs link in the same community ports.
    
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post #13 of 26
There's no way you're going to have internet access to more than one VLAN with the equipment you have, as has already been stated multiple times.

You could theoretically get this to work if you used 3 separate routers and implemented NAT, but it's a gigantic PITA that's a complete waste of time when you can simply change the subnet of each of your VLAN's.

Also, prevention of traffic in between VLAN's while maintaining connectivity to the internet would require routing and ACL's. If you had a router capable of 802.1q, you would not be able to assign the same IP range to each VLAN on the subinterface of the router. You also would not be able to assign the same IP range on another interface of the router.

Not sure why you demand to use exactly the same subnet when you have hundreds of thousands of private address ranges to chose from..
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post #14 of 26
Quote:
Originally Posted by Nivis Tigridis View Post
What the 2 last post say is correct if 1 VLAN = 1 IP range or subnet; in my case ALL the VLAN will have the SAME IP range and subnets.
Not possible. Vlan's = Subnets = Broadcast Domains. You can't have multiple vlan's sharing the same subnet.

If you have more then one Vlan on your l2 switch and want each to have their own DF-gateway then you need 802.1q support..
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post #15 of 26
Thread Starter 
Then guys, explain me how PRIVATE, COMMUNITY and ISOLATED Vlan works.

Because everywhere I look for info they tell me the inverse then you guys telling me! And I'm looking at high experienced trainer resources.
    
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post #16 of 26
Quote:
Originally Posted by Nivis Tigridis View Post
Then guys, explain me how PRIVATE, COMMUNITY and ISOLATED Vlan works.

Because everywhere I look for info they tell me the inverse then you guys telling me! And I'm looking at high experienced trainer resources.
I'm not going to explain it to you.. You have two ways to do inter-vlan routing..

One & Two

You should be more concerned with One, seeing as though your not exactly looking at multilayer switching through a cisco switch as your solution.
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post #17 of 26
Thread Starter 
Then WHY everybody is telling me that I want to do interVLAN routing...

It's NOT what I want to do ... I know I cannot do intervlan routing without a L3 "commercial" grade device (VS a home use one).

Sorry but I begin to doubt the last answer I've received and no body seem to take the time to explain me why I'm wrong.

Knowledge is what I want here... not a solution ready to implant.

So please either tell why I'm wrong and understandthat I don't want to to inter vlan routing, if it's cannot be done without it tell me why or just don't post.

NB: I'm no newbies, I've learn for the last 25 years the computer field by my own so please help me or don't bother me.
    
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post #18 of 26
Quote:
Originally Posted by Nivis Tigridis View Post
NB: I'm no newbies, I've learn for the last 25 years the computer field by my own so please help me or don't bother me.
suite yourself. I regret ever helping you with the previous issues you've had in the past..

Good luck.
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post #19 of 26
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post #20 of 26
Thread Starter 
Quote:
suite yourself. I regret ever helping you with the previous issues you've had in the past..

Good luck.
OK now I think you got wrong what I've said, I did been really angry at the time and I felt, by some of the reply, that I was took as a school kid and not a fellow member.

With that said, If I hurt somebody feelings I apologize dearly.

So here what I should have said:

1- I'm asking for help, I'm also asking for knowledge.

2- I've put what you quote so that peoples knows more to who they're talking to, not to brag.

3- Why I'm saying I don't want to do inter VLAN routing is basically I don't want the 2 vlan to see each other! That's the whole point of Community VLANS. At my understanding.

4- If I've been wrong in my choice of term my bad.

5- What really fed me up is when somebody want to help me and denied my asking of help. I've read information's about Inter Vlan routing but nothing is applied at my "Theorical" question and the little stuff about Community VLAN, isolation ports and so on is not complete to understand the whole aspect.

So the question remain and I believed this will be best formulated by:

Why couldn't I create a Community Vlan (a VLan into the primary VLAN and NOT a complete different VLAN [at least I understand it that way]) to prevent a group of physical ports /MAC add. (L2 only here) to speak with the rest of the network and the other way around.

Also a Community VLAN can only speak to it's fellow ports/MAC add. and the outside (that will be link to the home router -> Internet).

I need to understand why some said YES and other NO; simply point out the issue with a brief explanation if you don't want to get too detailed.
    
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