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Beginner

DHCP Snooping Syslog messages

All,

Should I receive a syslog message when a DHCP Snooping violation occurs?

I just configured DHCP Snooping on a Cisco 3850 switch running 3.6.4.  When a rogue DHCP server responds to a DHCP discovery broadcast, the switch drops packet and the drops increase in the show ip dhcp snooping statistics.  However, I do not see a new entry in the logs.  Should I see one?

 

When I have the following debugs on,

ip dhcp snooping packet

ip dhcp snooping event

I see the following in the logs:

DHCP_SNOOPING_SW: bridge packet output port set is null, packet is dropped.

 

Thank you,

 

 

T.J.

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Beginner

have you tried -

 show ip dhcp snooping bindings

have you tried -

  ()ip dhcp snooping vlan x smartlog

and you should receive the log on syslog server!

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