VLAN help on Dell PowerConnect 6200 Series and BT HomeHub
Hi Experts
My network skills are fairly basic and have a problem trying to set up vlans on a layer3 swtich that will:
talk to the broadband router to go out to the internet
get its DHCP details from the router too
talk to each other vlan attached devices
I have tried to set up VLAN 5,7,9 leaving 1 as default.
VLAN 1 management VLAN
VLAN 5 has the servers and NAS box
VLAN 7 has the PC's and laptops
VLAN 9 is the Router/internet devices
It seems that i can only connect to the router if its on the same VLAN as my PC's (BT router can have multiple addresses 192.168.7.254 and 192.168.9.254) and that i add a static route of 0.0.0.0 0.0.0.0 192.168.7.254
if i remove all vlans and have all ports back to vlan 1, and set teh management address to x.x.7.2 i can get to the router no problems without static routes and of course, connect to the switch using the IP via a browser instead of a serial port.
i have added a dagram for help understanding how i tried to set this up and also add the running-config details to assist too.
Any help / advice will be gratefully recieved. i have battled with this for days now with little success.
Its obvious that i have made some fundamental design/config mistakes along the way and i'm sure you will point them out for me.
Many thanks
Regards
Krystian
HomeOffice-Network-Switch-Config.txt
HomeOffice-Network-Diagram.jpg
My network skills are fairly basic and have a problem trying to set up vlans on a layer3 swtich that will:
talk to the broadband router to go out to the internet
get its DHCP details from the router too
talk to each other vlan attached devices
I have tried to set up VLAN 5,7,9 leaving 1 as default.
VLAN 1 management VLAN
VLAN 5 has the servers and NAS box
VLAN 7 has the PC's and laptops
VLAN 9 is the Router/internet devices
It seems that i can only connect to the router if its on the same VLAN as my PC's (BT router can have multiple addresses 192.168.7.254 and 192.168.9.254) and that i add a static route of 0.0.0.0 0.0.0.0 192.168.7.254
if i remove all vlans and have all ports back to vlan 1, and set teh management address to x.x.7.2 i can get to the router no problems without static routes and of course, connect to the switch using the IP via a browser instead of a serial port.
i have added a dagram for help understanding how i tried to set this up and also add the running-config details to assist too.
Any help / advice will be gratefully recieved. i have battled with this for days now with little success.
Its obvious that i have made some fundamental design/config mistakes along the way and i'm sure you will point them out for me.
Many thanks
Regards
Krystian
HomeOffice-Network-Switch-Config.txt
HomeOffice-Network-Diagram.jpg
ASKER
Hi
Many thanks for taking the time to help me.
I understand what you have said up to point 4.
to simplify. i have port 24 set to vlan 9 and the BT router is connected to it which has an IP of 192.168.9.254
what i don't understand is that i can ping from vlan 5 to 7 and vice versa. but from a machine in vlan 7 i cannot ping the BT router address. Yet if i then change port 24 to be on vlan 7, and change the router address to be 192.168.7.254 i can ping it. but not from anything on vlan 5 though. yet a server on vlan 5 can ping a machine on 7. How can this be??
Your help is appreciated
Regards
Krystian
Many thanks for taking the time to help me.
I understand what you have said up to point 4.
to simplify. i have port 24 set to vlan 9 and the BT router is connected to it which has an IP of 192.168.9.254
what i don't understand is that i can ping from vlan 5 to 7 and vice versa. but from a machine in vlan 7 i cannot ping the BT router address. Yet if i then change port 24 to be on vlan 7, and change the router address to be 192.168.7.254 i can ping it. but not from anything on vlan 5 though. yet a server on vlan 5 can ping a machine on 7. How can this be??
Your help is appreciated
Regards
Krystian
yep, because you have to add static routes to bt router.
you see, pcs from vlan 7 knows where default gateway is, but bt router is unaware about vlan5 and vlan7 networks, so you have to add static routes to bt router
you see, pcs from vlan 7 knows where default gateway is, but bt router is unaware about vlan5 and vlan7 networks, so you have to add static routes to bt router
ASKER
Ok now i understand!
I guess the fact that this is only a simple broadband router, and unable to set static routes like you segguested on it, i'm stuck!
How else can i go about this? surely i don't have to buy a seperate dedicated router just for something, i thought, so simple?
I presume there is nothing i can set on my layer 3 switch that can make this happen another way?
Thanks again.
Krystian
I guess the fact that this is only a simple broadband router, and unable to set static routes like you segguested on it, i'm stuck!
How else can i go about this? surely i don't have to buy a seperate dedicated router just for something, i thought, so simple?
I presume there is nothing i can set on my layer 3 switch that can make this happen another way?
Thanks again.
Krystian
no,no, don't give up!
If you can add multiple ips to it's interface, then you can add static routes ;)
have you checked the documentation? have you looked for advanced routing features?
however I did a quick search myself and i'm unlucky :(
can you change your homehub to a linksys router? they are cheap also? because the topology you've designed is a very good one, we are using the same in our enterprise...
If you can add multiple ips to it's interface, then you can add static routes ;)
have you checked the documentation? have you looked for advanced routing features?
however I did a quick search myself and i'm unlucky :(
can you change your homehub to a linksys router? they are cheap also? because the topology you've designed is a very good one, we are using the same in our enterprise...
ASKER
HI i have added screenshot for you to show you the extent of adding static IP's on this home BT Broadband Router. Is this enough do you think? only i cannot set it like i would/could on a proper router. Only having these as they are doesn't seem to allow me to do what i want.
I guess i could get another home router such as linksys. It sure can't be as basic as this one i've got. :-)
You give me hope :-) lol
Regards
Krystian
BTHomeHub-IPAddresses1.JPG
I guess i could get another home router such as linksys. It sure can't be as basic as this one i've got. :-)
You give me hope :-) lol
Regards
Krystian
BTHomeHub-IPAddresses1.JPG
oh, yes, it seems bt homehub interface does not allow you to add static routes :(
yep, try linksys, the normally have that option, even more, you can install dd-wrt on some of them. dd-wrt is one of the best alternative firmwares for many linux based routers.
yep, try linksys, the normally have that option, even more, you can install dd-wrt on some of them. dd-wrt is one of the best alternative firmwares for many linux based routers.
ASKER
Yesh just as i thought! :(
OK, so which Linksys would you reccommend. Are you talking about home type broadband routers here or professional ones?
Many thanks. :)
Krystian
OK, so which Linksys would you reccommend. Are you talking about home type broadband routers here or professional ones?
Many thanks. :)
Krystian
professional will work for sure, but also home routers can do the job.
however, if you have rather big network, professional box will be better in terms of performance.
Good luck,
Roman
however, if you have rather big network, professional box will be better in terms of performance.
Good luck,
Roman
ASKER
Hi there
Sorry been quiet for a while
Just a quick one then i'll close this off i think :)
The Switch allows me to put a default gateway on it. this appears to be assigned as part of the management VLAN as i MUST make it the same subnet as the anagement VLAN / Switch IP
So, what is this option for and can i not make my router the target of it?
so, for example
VLAn 1 on Port 1 which has my home router attached to it. This has an IP of say 192.168.1.254 and the switch has an Ip of say 192.168.1.2
Can i make the gateway 192.168.1.1 and it will route traffic out to my router from any vlan on my switch?
or am, i talking nonsense (wouldn't be the first time :)
Cheers for your help as always
Krystian
Sorry been quiet for a while
Just a quick one then i'll close this off i think :)
The Switch allows me to put a default gateway on it. this appears to be assigned as part of the management VLAN as i MUST make it the same subnet as the anagement VLAN / Switch IP
So, what is this option for and can i not make my router the target of it?
so, for example
VLAn 1 on Port 1 which has my home router attached to it. This has an IP of say 192.168.1.254 and the switch has an Ip of say 192.168.1.2
Can i make the gateway 192.168.1.1 and it will route traffic out to my router from any vlan on my switch?
or am, i talking nonsense (wouldn't be the first time :)
Cheers for your help as always
Krystian
hi!
yep, it should work like you say, however we were stack with traffic coming back from home router (static routes needed).
Good luck!
Romans
yep, it should work like you say, however we were stack with traffic coming back from home router (static routes needed).
Good luck!
Romans
ASKER
I guess i cannot use static routes in my vlan to do the work for the return traffic from the home router?
Thanks
Krystian
Thanks
Krystian
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ASKER
Just wamnted to thank you for your time and patience in helping me out with this annoying problem i have. :)
Many thanks
Krystian
Many thanks
Krystian
Your design is fine, however you have missed some things.
I'll try to explain your own scenario to you :)
1. Management vlan - it is for your mgmt workstation and switch, possibly for some other devices, rather obvious switch should not look for default gw here.
2. servers vlan, correct, switch has IP address in it and will work as a default gateway for servers
3. workstations vlan, correct and again switch will be a default gateway for workstations
4. most tricky part, bt router should have ip in vlan 9 network only, otherwise it would not see all your networks correctly. this 192.168.9.254 should be a default gw for your switch and you have configured it (ip route 0.0.0.0 0.0.0.0 192.168.9.254). then bt router should have static routes to vlan1, vlan5 and vlan7 networks:
( in cisco terms it would look like:
ip route 192.168.1.0 255.255.255.0 192.168.9.1
ip route 192.168.5.0 255.255.255.0 192.168.9.1
ip route 192.168.7.0 255.255.255.0 192.168.9.1 )
then dhcp scores: yes, your bt router should have dhcp pool for 192.168.7.0/24 network and switch should work as a dhcp relay agent and is configured correctly.