DHCP Relay issue with 5420F-24S-4XE switch

[WAJDI-S]

Hi all,

I have recently migrated two switch extreme network 5420F-24S-4XE in Stack for our customer,
I have encountered an issue concerning DHCP functionality,

Specifically,Although DHCP Relay has been enabled on the switches ,DHCP client are unable to obtain an IP address.

It is pertinent to mention that our client had been utilizing a Cisco switches for several years prior to this transition and without having any problem with DHCP

please note that I have  verified that the configuration is configured correctly, from the switch and from the DHCP server side,

I tried to capture the traffic using wire shark , the traffic stop in the switch ,

we request your assistance for this problem, given the critical nature of the DHCP service in the network

thank you for return

[WAJDI-S]

#show bootprelay
Bootprelay : Disabled on virtual router "VR-Default", but enabled on some VLANs
Include Secondary : Disabled
DHCP Relay Agent Information Option : Enabled on virtual router "VR-Default"
DHCP Relay Agent Information Check : Enabled on virtual router "VR-Default"
DHCP Relay Agent Information Policy : Replace
DHCP Relay Agent Information Remote-ID : "default"

DHCP/BOOTP relay statistics for virtual router "VR-Default"
Received from client = 49420 Received from server = 660
Requests relayed = 942 Responses relayed = 660
DHCP Discover = 48993 DHCP Offer = 293
DHCP Request = 379 DHCP Ack = 362
DHCP Decline = 0 DHCP NAck = 5
DHCP Release = 0
DHCP Inform = 48

DHCP Information Option 82 packets statistics for virtual router "VR-Default"
Received from client = 0 Received from server = 507
Requests replaced = 0 Responses dropped = 0
Opt82 added to Requests = 678

Note: Default Remote-ID : System MAC Address

[Gabriel_G · Accepted solution]

As Stefan mentioned:

Most Cisco folks forget to enable DHCP-Relay and IP-Forwarding on the VLAN in the direction of the DHCP server (rtlookup <DHCP Server IP>).

Be sure that you've enabled both bootprelay and IP Forwarding on the server VLAN.

https://extreme-networks.my.site.com/ExtrArticleDetail?an=000083193

[Stefan_K_]

IP-Forwarding enabled on the VLANs?
DHCP Relay enabled on both VLANs (Client- + Server-VLAN)?