DHCP accross VLANS

[GigaG]

I have an extreme summit switch and have 2 vlans

vlan 1: servers
IP address: 172.17.1.4

vlan 2: default
IP address 172.17.2.4

The dhcp server is on 172.17.1.x network and workstations are on the 2.x network. I am unable to get dhcp offers to go through between vlans... and yes ipfowarding is turned on

MCP ACA-I CTP

 

[tanderson3733]

2 commands needed:


enable bootprelay
configure bootprelay add <ipaddress of DHCP Server>

 

[GigaG]

Thank you, i will try that... one other question, When i turn tagging on and assign tagging on the ports.. i loose connection to everything. Why is this?? What am I missing

MCP ACA-I CTP

 

[gigaspeed]

When you say you turn tagging on and assign tagging on the ports do you mean you configure the ports as "tagged"?

For example:

configure vlan_1 add ports 1-10 tagged ?

If so, unless your NIC cards can handle 802.1q you will lose connection. If you want ports 1-10 in VLAN 1 and 11-24 in VLAN 2 you would:

configure vlan_1 add ports 1-10 untagged
configure vlan_2 add ports 11-24 untagged

 

[GigaG]

Thank you very much for all your help.... Hey, have you had experience with ISA servers. I'm trying to implement using my ISa firewall as the edge before the internet, but i also want to use this switch to VLAN what we talked about, everytime I set the workstations to use the switch as the gateway, they can't get to the ISA... Any suggestions??

MCP ACA-I CTP

 

[tanderson3733]

Sounds like you're missing the default route. Do a "show iproute"...you should see an entry for "Destination" as Default Route and "Gateway" as the IP Address of the ISA server. If there's no default route or it's different than the IP Address of the ISA then you need to correct that.

configure iproute add default <ip address>

or if there's one there but it's wrong just delete and recreate:

configure iproute delete default <wrong ip address>
configure iproute add default <correct ip address>