Hello,

i will check with our Networking escalation team if we can help you on this.

Can you give me the switch firmware version?

Thanks

Marco

the firmware version 3.3.18.1

Ok thanks for the information

Hello,

I have some questions to try to troubleshoot the issue:

What interface is the device not getting a DHCP address connected to?

What vlan is the device communicating on?

What is the IP of the DHCP server?

Where is it connected?

Thanks

Marco

the dhcp server is now the tz300w firewall. It is connected to switch-port 1/g10. I subbed the 6248 for a little 5 port netgear unmanned switch and all the 4 connected test clients got dhcp instantly. I put the 5 cables into vlan 20 ports on the 6248 and had no good result. still no dhcp leases. I can ping the firewall from command prompt and the cli.

no devices connected to an interface on vlan 20 can get a dhcp address. i can get to the internet with vlan 20 by setting a static address with the gateway set to the dhcp server ip address.

The IP of the DHCP server is 192.168.0.254

the network is arranged like this.

cable isp modem>>firewal w/ wifi wlan>>lanport connected to 1/g10 on pc6248 switch>>half a dozen PC clients and a server attached to vlan 20(server has NIC Team LAG setup on 1/23,1/24 because why not), vlans 30-70 are designated for iscsi traffic.

the device not getting dhcp is a win 10 laptop connected to 1/g12

Thanks for the help!

From the provided configuration, interface 1/g10 is in vlan 10 and your dhcp server is in vlan 20. The address of the gateway is in vlan 20 and the address you are attempting to apply is in vlan 20. It seems the 1/g10 should be in vlan 20, not vlan 10.

I meant 1/g11 not 10 sorry.

I got rid of the vlan 10 and put the rest of the unused ports in vlan 20

here is an updated config, but it still have the same problem as of this morning

enable

console#show running-config
!Current Configuration:
!System Description "PowerConnect 6248, 3.3.18.1, VxWorks 6.5"
!System Software Version 3.3.18.1
!Cut-through mode is configured as disabled
!
configure
gvrp enable
vlan database
vlan 20,30,40,50,60,70
vlan routing 20 2
vlan routing 30 3
vlan routing 40 4
vlan routing 70 5
vlan routing 60 6
vlan routing 50 7
exit
sntp broadcast client enable
sntp client poll timer 1024
sntp server 0.north-america.pool.ntp.org
clock timezone -5 minutes 0
stack

member 1 2
exit
ip address dhcp
ip name-server 192.168.0.20
logging file info
ip https server
ip routing
ip route 0.0.0.0 0.0.0.0 192.168.0.254
ip helper-address 192.168.0.254 dhcp
ip helper-address 192.168.0.254 netbios-ns
ip helper-address 192.168.0.254 netbios-dgm
interface vlan 20
name "LAN"
routing
ip address 192.168.0.1 255.255.255.0
ip irdp
exit
interface vlan 30
name "ISCSI MANAGEMENT"
routing
ip address 192.168.128.1 255.255.255.0

exit
interface vlan 40
name "ISCSI 0 PORT TRAFFIC"
routing
ip address 192.168.130.1 255.255.255.0
bandwidth 10000
ip mtu 1500
exit
interface vlan 50
name "ISCSI 1 PORT TRAFFIC"
routing
ip address 192.168.131.1 255.255.255.0
exit
interface vlan 60
name "ISCSI 2 PORT TRAFFIC"
routing
ip address 192.168.132.1 255.255.255.0
bandwidth 10000
ip mtu 1500
exit
interface vlan 70

name "ISCSI 3 PORT TRAFFIC"
routing
ip address 192.168.133.1 255.255.255.0
exit
username "admin" password 8e1c5b7244b5fdfde74aa850bda6e0f4 level 15 encrypted
ip dhcp snooping
ip dhcp snooping vlan 10,20
dhcp l2relay
dhcp l2relay vlan 10,20
dhcp l2relay circuit-id vlan 10,20
!
interface ethernet 1/g1
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g2
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/g3
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g4
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g5
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g6
gvrp enable
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/g7
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g8
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g9
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g10
gvrp enable
mtu 9216

switchport access vlan 20
exit
!
interface ethernet 1/g11
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g12
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g13
gvrp enable
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/g14
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g15
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g16
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g17
gvrp enable
mtu 9216

switchport access vlan 20
exit
!
interface ethernet 1/g18
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g19
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g20
gvrp enable
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/g21
ip dhcp snooping trust
gvrp enable
mtu 9216
switchport mode trunk
exit
!
interface ethernet 1/g22
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g23
channel-group 1 mode auto
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g24

channel-group 1 mode auto
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g25
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g26
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g27
gvrp enable
mtu 9216

switchport access vlan 20
exit
!
interface ethernet 1/g28
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g29
gvrp enable
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g30
description "WAN_IO_PORT"
gvrp enable
mtu 9216
switchport mode general
switchport general pvid 20

switchport general allowed vlan add 20,30,40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g31
gvrp enable
mtu 9216
switchport access vlan 30
exit
!
interface ethernet 1/g32
gvrp enable
mtu 9216
switchport access vlan 30
exit
!
interface ethernet 1/g33
gvrp enable
mtu 9216
switchport access vlan 40
exit

!
interface ethernet 1/g34
gvrp enable
mtu 9216
switchport access vlan 40
exit
!
interface ethernet 1/g35
gvrp enable
mtu 9216
switchport access vlan 50
exit
!
interface ethernet 1/g36
gvrp enable
mtu 9216
switchport access vlan 50
exit
!
interface ethernet 1/g37
gvrp enable

mtu 9216
switchport access vlan 60
exit
!
interface ethernet 1/g38
gvrp enable
mtu 9216
switchport access vlan 60
exit
!
interface ethernet 1/g39
gvrp enable
mtu 9216
switchport access vlan 70
exit
!
interface ethernet 1/g40
gvrp enable
mtu 9216
switchport access vlan 70
exit

!
interface ethernet 1/g41
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g42
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g43
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g44
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/g45
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g46
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g47
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g48
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg1

mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg2
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg3
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg4
mtu 9216
switchport access vlan 20
exit
!
interface port-channel 1
switchport mode general

mtu 9216
exit
!
interface port-channel 2
mtu 9216
exit
!
interface port-channel 3
mtu 9216
exit
!
interface port-channel 4
mtu 9216
exit
!
interface port-channel 5
mtu 9216
exit
!
interface port-channel 6
mtu 9216

exit
!
interface port-channel 7
mtu 9216
exit
!
interface port-channel 8
mtu 9216
exit
!
interface port-channel 9
mtu 9216
exit
!
interface port-channel 10
mtu 9216
exit
!
interface port-channel 11
mtu 9216
exit

!
interface port-channel 12
mtu 9216
exit
!
interface port-channel 13
mtu 9216
exit
!
interface port-channel 14
mtu 9216
exit
!
interface port-channel 15
mtu 9216
exit
!
interface port-channel 16
mtu 9216
exit
!

interface port-channel 17
mtu 9216
exit
!
interface port-channel 18
mtu 9216
exit
!
interface port-channel 19
mtu 9216
exit
!
interface port-channel 20
mtu 9216
exit
!
interface port-channel 21
mtu 9216
exit
!
interface port-channel 22

mtu 9216
exit
!
interface port-channel 23
mtu 9216
exit
!
interface port-channel 24
mtu 9216
exit
!
interface port-channel 25
mtu 9216
exit
!
interface port-channel 26
mtu 9216
exit
!
interface port-channel 27
mtu 9216

exit
!
interface port-channel 28
mtu 9216
exit
!
interface port-channel 29
mtu 9216
exit
!
interface port-channel 30
mtu 9216
exit
!
interface port-channel 31
mtu 9216
exit
!
interface port-channel 32
mtu 9216
exit

!
interface port-channel 33
mtu 9216
exit
!
interface port-channel 34
mtu 9216
exit
!
interface port-channel 35
mtu 9216
exit
!
interface port-channel 36
mtu 9216
exit
!
interface port-channel 37
mtu 9216
exit
!

interface port-channel 38
mtu 9216
exit
!
interface port-channel 39
mtu 9216
exit
!
interface port-channel 40
mtu 9216
exit
!
interface port-channel 41
mtu 9216
exit
!
interface port-channel 42
mtu 9216
exit
!
interface port-channel 43

mtu 9216
exit
!
interface port-channel 44
mtu 9216
exit
!
interface port-channel 45
mtu 9216
exit
!
interface port-channel 46
mtu 9216
exit
!
interface port-channel 47
mtu 9216
exit
!
interface port-channel 48
mtu 9216

exit
exit

console#

Hello rorycollins0,
 
I've check configuration you provided and would like to recommend you follow troubleshooting steps:
 
1. You use "ip address dhcp" . That's a global configuration. In case switch uses statis IP addresses it is recommended to remove this command.
2. Why did you also apply command "ip irdp" on interface VLAN 20?
3. You also need to add command  "switchport mode access" to interfaces 1/g11 and 1/g12:
 
interface ethernet 1/g11
switchport mode access
switchport access vlan 20
 
interface ethernet 1/g12
switchport mode access
switchport access vlan 20
 
When you add this command line, please check does laptop receive IP addresses from 1/g12 or doesn't.
I hope these steps will help to resolve the issue.
 
Please ask me, if you have any questions.
Thank you.
Maria Januszka 
#IWork4Dell
Dell | Social Outreach Services - Enterprise

I did what you sugested. I dont see what yor saying about the switchport mode access comand not being in the running config. I think it just states it a bit differnt. It took the code in cli as you suggested. I did not see any apparent change on the section for those two interfaces.

I tried several times to get any of the vlan 20 ports to grant a dhcp lease. I again confirmed my work by directly connecting the lan port on the tz300w firewall to the laptop. Did a ipconfig release,renew and got a dhcp address in the 192.168.0.x pool within 10 seconds was on youtube. etc. then without doing any thing i put the lan cable back into vlan 20 1/g11 port. internet browsing resumed within about 5 seconds. Then i released and rened the config. I got no lease after several tries, tried other ports i knew to be config to vlan 20 and still nothig connected several different cables between the g12 and the laptop and got no dhcp lease. I have never applied vlan before. My old switch was a 12 or so port netgear dumb switch.

I'm really thankful for the help. I am going to try to do some packet sniffing with wireshark to see if i can see the broadcasts for lease requests. but im wondering if the hardware is somehow faulty? IDK

Thanks again to all.

Here is the updated config

console#
console#

console#show run
!Current Configuration:
!System Description "PowerConnect 6248, 3.3.18.1, VxWorks 6.5"
!System Software Version 3.3.18.1
!Cut-through mode is configured as disabled
!
configure
vlan database
vlan 20,30,40,50,60,70
vlan routing 20 2
vlan routing 30 3
vlan routing 40 4
vlan routing 70 5
vlan routing 60 6
vlan routing 50 7
vlan association subnet 192.168.0.0 255.255.255.0 20
vlan association subnet 192.168.128.0 255.255.255.0 30
vlan association subnet 192.168.130.0 255.255.255.0 40
vlan association subnet 192.168.131.0 255.255.255.0 50
vlan association subnet 192.168.132.0 255.255.255.0 60
vlan association subnet 192.168.133.0 255.255.255.0 70
exit

sntp broadcast client enable
sntp client poll timer 1024
sntp server 0.north-america.pool.ntp.org
clock timezone -5 minutes 0
stack
member 1 2
exit
ip address none
no ip domain-lookup
logging file info
ip https server
ip routing
ip route 0.0.0.0 0.0.0.0 192.168.0.254
ip helper-address 192.168.0.254 dhcp
ip helper-address 192.168.0.254 netbios-ns
ip helper-address 192.168.0.254 netbios-dgm
interface vlan 20
name "LAN"
routing
ip address 192.168.0.1 255.255.255.0
exit

interface vlan 30
name "ISCSI MANAGEMENT"
routing
ip address 192.168.128.1 255.255.255.0
exit
interface vlan 40
name "ISCSI 0 PORT TRAFFIC"
routing
ip address 192.168.130.1 255.255.255.0
bandwidth 10000
ip mtu 1500
exit
interface vlan 50
name "ISCSI 1 PORT TRAFFIC"
routing
ip address 192.168.131.1 255.255.255.0
exit
interface vlan 60
name "ISCSI 2 PORT TRAFFIC"
routing
ip address 192.168.132.1 255.255.255.0

bandwidth 10000
ip mtu 1500
exit
interface vlan 70
name "ISCSI 3 PORT TRAFFIC"
routing
ip address 192.168.133.1 255.255.255.0
exit
username "admin" password 8e1c5b7244b5fdfde74aa850bda6e0f4 level 15 encrypted
iscsi enable
ip dhcp snooping
ip dhcp snooping vlan 10,20
dhcp l2relay
dhcp l2relay vlan 10,20
dhcp l2relay circuit-id vlan 10,20
!
interface ethernet 1/g1
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/g2
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g3
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g4
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g5
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g6

mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g7
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g8
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g9
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g10
mtu 9216

switchport access vlan 20
exit
!
interface ethernet 1/g11
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g12
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g13
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g14
mtu 9216
switchport access vlan 20

exit
!
interface ethernet 1/g15
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g16
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g17
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g18
mtu 9216
switchport access vlan 20
exit

!
interface ethernet 1/g19
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g20
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g21
ip dhcp snooping trust
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g22
mtu 9216
switchport access vlan 20
exit

!
interface ethernet 1/g23
channel-group 1 mode auto
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g24
channel-group 1 mode auto
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g25
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g26
mtu 9216
switchport access vlan 20

exit
!
interface ethernet 1/g27
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g28
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g29
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g30
description "WAN_IO_PORT"
mtu 9216
switchport mode general

switchport general pvid 20
switchport general allowed vlan add 20,30,40 tagged
switchport general allowed vlan remove 1
exit
!
interface ethernet 1/g31
mtu 9216
switchport access vlan 30
exit
!
interface ethernet 1/g32
mtu 9216
switchport access vlan 30
exit
!
interface ethernet 1/g33
mtu 9216
switchport access vlan 40
exit
!
interface ethernet 1/g34

mtu 9216
switchport access vlan 40
exit
!
interface ethernet 1/g35
mtu 9216
switchport access vlan 50
exit
!
interface ethernet 1/g36
mtu 9216
switchport access vlan 50
exit
!
interface ethernet 1/g37
mtu 9216
switchport access vlan 60
exit
!
interface ethernet 1/g38
mtu 9216

switchport access vlan 60
exit
!
interface ethernet 1/g39
mtu 9216
switchport access vlan 70
exit
!
interface ethernet 1/g40
mtu 9216
switchport access vlan 70
exit
!
interface ethernet 1/g41
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g42
mtu 9216
switchport access vlan 20

exit
!
interface ethernet 1/g43
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g44
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g45
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g46
mtu 9216
switchport access vlan 20
exit

!
interface ethernet 1/g47
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/g48
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg1
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg2
mtu 9216
switchport access vlan 20
exit
!

interface ethernet 1/xg3
mtu 9216
switchport access vlan 20
exit
!
interface ethernet 1/xg4
mtu 9216
switchport access vlan 20
exit
!
interface port-channel 1
switchport mode general
mtu 9216
exit
!
interface port-channel 2
mtu 9216
exit
!
interface port-channel 3
mtu 9216

exit
!
interface port-channel 4
mtu 9216
exit
!
interface port-channel 5
mtu 9216
exit
!
interface port-channel 6
mtu 9216
exit
!
interface port-channel 7
mtu 9216
exit
!
interface port-channel 8
mtu 9216
exit

!
interface port-channel 9
mtu 9216
exit
!
interface port-channel 10
mtu 9216
exit
!
interface port-channel 11
mtu 9216
exit
!
interface port-channel 12
mtu 9216
exit
!
interface port-channel 13
mtu 9216
exit
!

interface port-channel 14
mtu 9216
exit
!
interface port-channel 15
mtu 9216
exit
!
interface port-channel 16
mtu 9216
exit
!
interface port-channel 17
mtu 9216
exit
!
interface port-channel 18
mtu 9216
exit
!
interface port-channel 19

mtu 9216
exit
!
interface port-channel 20
mtu 9216
exit
!
interface port-channel 21
mtu 9216
exit
!
interface port-channel 22
mtu 9216
exit
!
interface port-channel 23
mtu 9216
exit
!
interface port-channel 24
mtu 9216

exit
!
interface port-channel 25
mtu 9216
exit
!
interface port-channel 26
mtu 9216
exit
!
interface port-channel 27
mtu 9216
exit
!
interface port-channel 28
mtu 9216
exit
!
interface port-channel 29
mtu 9216
exit

!
interface port-channel 30
mtu 9216
exit
!
interface port-channel 31
mtu 9216
exit
!
interface port-channel 32
mtu 9216
exit
!
interface port-channel 33
mtu 9216
exit
!
interface port-channel 34
mtu 9216
exit
!

interface port-channel 35
mtu 9216
exit
!
interface port-channel 36
mtu 9216
exit
!
interface port-channel 37
mtu 9216
exit
!
interface port-channel 38
mtu 9216
exit
!
interface port-channel 39
mtu 9216
exit
!
interface port-channel 40

mtu 9216
exit
!
interface port-channel 41
mtu 9216
exit
!
interface port-channel 42
mtu 9216
exit
!
interface port-channel 43
mtu 9216
exit
!
interface port-channel 44
mtu 9216
exit
!
interface port-channel 45
mtu 9216

exit
!
interface port-channel 46
mtu 9216
exit
!
interface port-channel 47
mtu 9216
exit
!
interface port-channel 48
mtu 9216
exit
exit

console#

i solved the main issue. I was not aware that the vlans and dhcp pools also had to be configured into the firewall interface configurations. Now it is working and handing out leases without fail! Thanks for your time and being here to help problem solve. Maybe this will help someone else as well.