is this config possible?

Unanswered Question
Jun 21st, 2010
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I have a Cisco 3560G switch.


Currently we have a 10.1.2.x subnet that is present on vlan 10.


I want to add a 10.1.3.x subnet and dhcp for it and place it on vlan 3 (if possible)


I'm not sure how to go about this, I've created the vlan, but I can't get it to route correctly because I can't tell the switch look at itself as the route...


I've tried adding a secondary interface on vlan 10 with a 10.1.3.1 address but then there's no way for the dhcp server to know the client requesting needs a 10.1.3.x address is there?


Do I need another switch or router or something to get this to work correctly?

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glen.grant Mon, 06/21/2010 - 09:02
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  If you just want to add another subnet  just make sure ip routing is turned on for the 3560 .  then the following


conf t

vlan 3

exit



int vlan 3

ip address 



Port config

int gx/x

switchport

switchport mode access

switchport access vlan 3

switchport host

johnwhites Mon, 06/21/2010 - 09:14
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yes, actually i did that.


I added vlan 3,
assigned it an address


made that address the default gateway in dhcp


and assigned an ip-helper address to vlan3 that points to my dhcp server on vlan 10


everything works as far as getting an address and I can browse local things, but it seems I have some kind of DNS issue...like I can't get to google.com..


I can do an NSlookup and the server returns the addresses but I can't browse to it for some reason..still looking into it.

glen.grant Mon, 06/21/2010 - 09:17
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  Yeah that doesn't sound like a switch issue .

johnwhites Mon, 06/21/2010 - 10:06
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Yeah, it was a firewall issue, so it's not my problem anymore! haha...thought I was losing my mind there for a while.

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