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DHCP relay on a 2626

red5.1992
Occasional Advisor

DHCP relay on a 2626

Hi everybody and happy new year

i have a procurve2626 with no 802.1q on it
this is a end user switch, i use it only as basic layer 2 switch
the switch above has several vlans, and its uplink port is of course untagged for this vlans.

i have a problem with the DHCP broadcast on it. It doesn't relay the frames...
my dhcp server is on the same vlan as the users connected on the switch

here is the conf of my switch

; J4899B Configuration Editor; Created on release #H.10.50

hostname "FRxxNETxx"
snmp-server contact "xxx"
snmp-server location "LT1"
web-management management-url ""
time timezone 60
time daylight-time-rule Western-Europe
interface 1
no lacp
exit
interface 2
no lacp
exit
interface 3
no lacp
exit
interface 4
no lacp
exit
interface 5
no lacp
exit
interface 6
no lacp
exit
interface 7
no lacp
exit
interface 8
no lacp
exit
interface 9
no lacp
exit
interface 10
no lacp
exit
interface 11
no lacp
exit
interface 12
no lacp
exit
interface 13
no lacp
exit
interface 14
no lacp
exit
interface 15
no lacp
exit
interface 16
no lacp
exit
interface 17
no lacp
exit
interface 18
no lacp
exit
interface 19
no lacp
exit
interface 20
no lacp
exit
interface 21
no lacp
exit
interface 22
no lacp
exit
interface 23
no lacp
exit
interface 24
no lacp
exit
interface 25
no lacp
exit
interface 26
no lacp
exit
interface 27
no lacp
exit
interface 28
no lacp
exit
interface 29
no lacp
exit
interface 30
no lacp
exit
interface 31
no lacp
exit
interface 32
no lacp
exit
interface 33
no lacp
exit
interface 34
no lacp
exit
interface 35
no lacp
exit
interface 36
no lacp
exit
interface 37
no lacp
exit
interface 38
no lacp
exit
interface 39
no lacp
exit
interface 40
no lacp
exit
interface 41
no lacp
exit
interface 42
no lacp
exit
interface 43
no lacp
exit
interface 44
no lacp
exit
interface 45
no lacp
exit
interface 46
no lacp
exit
interface 47
no lacp
exit
interface 48
no lacp
exit
interface 49
speed-duplex auto-1000
exit
ip default-gateway 10.33.xxx.xxx
sntp server 10.33.xxx.xxx
timesync sntp
sntp unicast
logging 192.168.xxx.xxx
snmp-server community "public"
snmp-server community "xxxx" Unrestricted
snmp-server host 192.168.xxx.xxx "public"
snmp-server host 192.168.xxx.xxx "public"
vlan 1
name "DEFAULT_VLAN"
untagged 1-50
ip address 10.33.xxx.xxx 255.255.xxx.xxx
exit
spanning-tree protocol-version MSTP


thanks very much for your help !

4 REPLIES
Evert Goor
Trusted Contributor

Re: DHCP relay on a 2626

If the server is also on this switch there is nothing that can block it. Take a look at the dhcp server.

To be honest can not see any problem with this configuration.
You have to look outside this switch.
red5.1992
Occasional Advisor

Re: DHCP relay on a 2626

thanks very for your reply

yes that's what i think but it's weird...

i'll see on my server, which i already did, but i'll double check
red5.1992
Occasional Advisor

Re: DHCP relay on a 2626

i found out,

i had to setup the ip helper on my core switch.

and it worked, what it didn't explain is, it used to work before...

red5.1992
Occasional Advisor

Re: DHCP relay on a 2626

see my last post