Cisco 300 Series User Manual

DHCP Snooping Commands
OL-32830-01 Command Line Interface Reference Guide 326
13
User Guidelines
Since the IP Source Guard uses the Ternary Content Addressable Memory
(TCAM) resources, there may be situations when IP Source Guard addresses are
inactive because of a lack of TCAM resources.
By default, once every minute the software conducts a search for available space
in the TCAM for the inactive IP Source Guard addresses.
Use the ip source-guard tcam retries-freq command to change the retry
frequency or to disable automatic retries for TCAM space.
Use the ip source-guard tcam locate command to manually retry locating TCAM
resources for the inactive IP Source Guard addresses.
This command displays the inactive IP source guard addresses.
Example
The following example displays the IP source guard inactive addresses.
13.19 show ip source-guard statistics
Use the show ip source-guard statistics EXEC mode command to display the
Source Guard dynamic information (permitted stations).
Syntax
show ip source-guard statistics [
vlan vlan-id ]
Parameters
• vlan-id —Display the statistics on this VLAN.
switchxxxxxx# show ip source-guard inactive
TCAM resources search frequency: 60 seconds
Interface
--------
gi12
gi13
gi14
Filter
-----
IP
IP
I
IP
Address
---------
10.1.8.32
MAC Address
-----------
0060.704C.8
3FF
VLAN
-----
3
Type
----
DHCP
Reason
----------
Resource
Problem
Trust port

Cisco 300 Series Specifications

General

Model	Cisco 300 Series
Category	Switch
Dimensions	Varies by model
Weight	Varies by model
Power over Ethernet (PoE)	Available on select models
Management	Web-based GUI, SNMP, CLI
VLANs	Up to 256
Security Features	ACLs, 802.1X, Port Security
Humidity	10% to 90% non-condensing
Ports	8, 16, 24, 48