From: Geert Nijs (Geert.Nijs@simac.be)
Date: Sat Mar 22 2008 - 12:32:47 ART
All,
Does a DHCP snooping configuration NEED an ip helper address defined on the
same switch ?
In my lab setup, DHCP breaks when i configure dhcp snooping without ip helper
address.
Setup:
Access = C3750 , 12.2(25)SE2
Distribution= C6500, sup720, 12.2(18)SXF8
ACCESS
int vlan 100
ip address 1.1.1.250 255.255.255.0 <- for management of the
switch !
int gi1/0/49 <--- uplink (is dhcp trusted)
ip dhcp trust
ip dhcp snooping vlan 100 <- activate snooping
on access
DISTRIBUTION
int vlan 100
ip address 1.1.1.2 255.255.255.0
standby 1 ip 1.1.1.1
ip helper-address 192.168.1.1
Without dhcp snooping on the access, the config works. Clients get an ip
address.
Once i enable dhcp snooping on the access, dhcp doesn't work anymore ??
regards,
Geert Nijs
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