On a catalyst switch I have two VLANs. I have a need to configure a DHCP server on the switch for one VLAN but not the other. The issue is that on the VLAN with no DHCP server configured, the switch is still sending a DHCPNACK when it receives a DHCPREQUEST. The DHCPNACK is causing an application I am running in that VLAN to have issues. I was expecting that if DHCP was not configured for a VLAN the switch wouldn't send any sort of DHCP response. Is there a way to block these NACKs or suppress them somehow? Thanks, Mike
can't you just put an access list on the SVI of the VLAN ?
ip access-list extended BLOCK_DHCP deny udp any any eq bootpc deny udp any any eq bootps permit ip any any ! interface Vlan20 ip access-group BLOCK_DHCP in
can't you just put an access list on the SVI of the VLAN ?
ip access-list extended BLOCK_DHCP deny udp any any eq bootpc deny udp any any eq bootps permit ip any any ! interface Vlan20 ip access-group BLOCK_DHCP in
That was my next question :) I tried to create an ACL to do just that but I guess I did it wrong. Your ACL did the trick. Thanks so much for the assist @Georg Pauwen.
Mike
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