Dear All;
I have implemented ACL apply on SW 3750 and want to set DCHP Relay agent to forward to DCHP server that is different subnet. I have 2 VLAN . DCHP is on VLAN1 and want VLAN 2 can get ip from DCHP server on VLAN
Thanks and Regards; Vimokh
DHCP version 4 uses UDP with source IP address 0.0.0.0,destinaion address 255.255.255.255, source UDP port 68 and destination UDP port 67 to send a DHCPDISCOVER request to the DHCP server.
The DHCP server will then unicast a DHCP Offer packet back to the DHCP relay agent which will forward it to the DHCP client.
The DHCP client will then sent a DHCP request to the Dhcp server indicating that it will use the offered IP address.
The DHCP server will unicast a DHCP acknowledgement to the DHCP client.
The access list smust be modified to permit the DHCP packets described.
Also, clients renewing their lease unicast a DHCPREQUEST to the server that assigned them their lease. You need to account for this on an ingress ACL as well, i.e.
! permit udp eq 68 host eq 67 !
Thank you all for your information.
Vimokh Mart>
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