09-26-2012 03:04 AM - edited 03-07-2019 09:07 AM
Hi,
I need to apply DHCP snooping on 4500 series switches working as L2 in my Network. We have external DHCL Server in another location connected with 6500 series switch.
Running EIGRP Configured Voice & Data Vlan both
DHCP Server -------- 6509 switch<----------------------------------->6509 Switch -------- 4500 switch ----------------------------------------------------------Ip Phones.
(ving Redundant) (ving Redundant)
Scenario is attached for refernece.
I need to know whether the configuration which I mentioned in scenario is enough for apply DHCP snooping in my network. Please suggest ASAP as same is need to apply soon.
Thanks & Regards
Vinod
09-26-2012 03:58 AM
Hope you made access switch as Relay agent (note: you should be able to reach DHCP server from access switch):
Yes you can run DHCP snooping. enable snooping globally and per vlan based, you are good to run it.
Example:
ip dhcp snooping vlan 10,20,30
no ip dhcp snooping information option
! We are using a windows DHCP server, witch cannot use option 82.
ip dhcp snooping
On the trunk to the core switch
ip dhcp snooping trust
Please rate helpfull posts.
Regards,
srikanth
09-26-2012 04:19 AM
HI Vinod,
uSE THIS.
ip dhcp snooping vlan 1-5, 6-10
ip dhcp snooping
and on which port of core switch ur dhcp server connected, on that port please apply"ip dhcp snooping trust"
and u can use:
example
!
interface Vlan2
ip address 10.73.2.254 255.255.255.0
ip helper-address 10.73.21.1
interface Vlan6
ip address 10.73.6.254 255.255.255.0
ip helper-address 10.73.21.1
to get automatic ip address on each client: in diff vlans
Regards
Please rate if it helps.
09-26-2012 07:00 AM
Thanks for suggestion Team, I will check and update you accordingly.
Hope you have checked the attached scenario. mentioned configuration is correct ?? Plz suggest
Here, Vlans I configured on L3 switch which connected to L2 switches is not configured on another L3 switch to whom DHCP server is connected.
Using EIGRP to advertise the network between both L3 switch.
09-27-2012 04:37 AM
Hi Team,
As per attached document, we need to enable option 82 on L3 switch to whom L2 switches are connected. But what about other L3 switch on which we connected DHCP server. Do we need to configure anything on same ??
Please suggest
Regards
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