User Guide

OmniAccess SafeGuard OS Administration Guide
212
Chapter 6: Configuring Authentication and Role Derivation
When the host database sees a DHCP exchange for an interface it makes an entry in the
DHCP cache. When traffic is observed from that host, the cache entry is removed from
the cache and the information contained in it is applied to the host table.
To see the contents of the DHCP cache, use the
show host dhcp-cache command.
show host dhcp-cache
The following table describes the output of the command:
The host database maintains counters for each event that it processes. These events are
viewable with the command
show host counters. These events include:
■ L2 Events – The number of times L2 interfaces have been added, deleted, or
moved from one port to another.
■ L3 Events – The number of times L3 interfaces have been added, deleted or
filtered (L3 events from network side ports are filtered).
■ DHCP Events – The number of entries that have been added to/deleted from the
DHCP table.
For example:
SafeGuardOS) #show host counters
L2 Add Events.................................. 2
L2 Del Events.................................. 1
L2 Move Events................................. 0
L2 Errors...................................... 0
L2 Filter...................................... 4
L3 Add Events.................................. 4
L3 Del Events.................................. 2
L3 Errors...................................... 0
L3 Filter...................................... 9
DHCP Del....................................... 0
DHCP Add....................................... 2
DB Errors...................................... 0
HA Errors...................................... 0
Field Description
VLAN VLAN that traffic was seen on.
MAC Client MAC address (this is the hwaddr field in the bootp
packets).
IP Addr IP address assigned by the DHCP server.
SRC Mapping source (DHCP).
Learned Time when the DHCP cache entry was made.
HA - Remote/Local Indicates which system originally saw the DHCP
exchange.