ADMINISTRATION
GUIDE
Cisco 300 Series Managed Switches Administration Guide
2
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Cisco 300 Series Managed Switches Administration Guide 2
Contents
Chapter 2: Getting Started 10
Starting the Web-based Configuration Utility 10
Quick Start Device Configuration 14
Interface Naming Conventions 14
Window Navigation 16
Chapter 3: Status and Statistics 20
System Summary 20
Ethernet Interfaces 20
Etherlike Statistics 22
GVRP Statistics 23
802.1X EAP Statistics 24
ACL Statistics 25
TCAM Utilization 25
Health 26
RMON 26
View Log 33
Chapter 4: Administration: System Log 34
Setting System Log Settings 34
Setting Remote Logging Settings 36
Viewing Memory Logs 37
Chapter 5: Administration: File Management 39
System Files 39
Upgrade/Backup Firmware/Language 42
Active Image 45
Download/Backup Configuration/Log 46
Configuration Files Properties 50
Copy/Save Configuration 51
Cisco 300 Series Managed Switches Administration Guide 1
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Auto Configuration/Image Update via DHCP 52
61
Chapter 6: Administration 62
Device Models 63
System Settings 65
Console Settings (Autobaud Rate Support) 68
Management Interface 68
User Accounts 68
Defining Idle Session Timeout 69
Time Settings 69
System Log 69
File Management 69
Rebooting the Device 70
Routing Resources 71
Health 73
Diagnostics 74
Discovery - Bonjour 74
Discovery - LLDP 74
Discovery - CDP 75
Ping 75
Traceroute 76
Chapter 7: Administration: Time Settings 78
System Time Options 78
SNTP Modes 80
Configuring System Time 80
Chapter 8: Administration: Diagnostics 89
Copper Ports Tests 89
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Displaying Optical Module Status 91
Configuring Port and VLAN Mirroring 92
Viewing CPU Utilization and Secure Core Technology 94
Chapter 9: Administration: Discovery 95
Bonjour 95
LLDP and CDP 97
Configuring LLDP 98
Configuring CDP 117
CDP Statistics 124
Chapter 10: Port Management 125
Configuring Ports 125
Loopback Detection 130
Link Aggregation 132
UDLD 139
PoE 139
Configuring Green Ethernet 139
Chapter 11: Port Management: Unidirectional Link Detection 146
UDLD Overview 146
UDLD Operation 147
Usage Guidelines 149
Dependencies On Other Features 149
Default Settings and Configuration 150
Before You Start 150
Common UDLD Tasks 150
Configuring UDLD 151
Chapter 12: Smartport 155
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Overview 156
What is a Smartport 156
Smartport Types 157
Smartport Macros 159
Macro Failure and the Reset Operation 160
How the Smartport Feature Works 161
Auto Smartport 161
Error Handling 165
Default Configuration 165
Relationships with Other Features and Backwards Compatibility 166
Common Smartport Tasks 166
Configuring Smartport Using The Web-based Interface 168
Built-in Smartport Macros 173
Chapter 13: Port Management: PoE 184
PoE on the Device 184
PoE Properties 187
PoE Settings 188
Chapter 14: VLAN Management 191
Overview 191
Regular VLANs 199
Private VLAN Settings 206
GVRP Settings 207
VLAN Groups 208
Voice VLAN 210
Access Port Multicast TV VLAN 222
Customer Port Multicast TV VLAN 225
Chapter 15: Spanning Tree 228
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STP Flavors 228
STP Status and Global Settings 229
Spanning Tree Interface Settings 231
Rapid Spanning Tree Settings 233
Multiple Spanning Tree 235
MSTP Properties 235
VLANs to a MSTP Instance 236
MSTP Instance Settings 237
MSTP Interface Settings 238
Chapter 16: Managing MAC Address Tables 241
Static MAC Addresses 242
Dynamic MAC Addresses 243
Reserved MAC Addresses 244
Chapter 17: Multicast 245
Multicast Forwarding 245
Multicast Properties 250
MAC Group Address 250
IP Multicast Group Addresses 252
IPv4 Multicast Configuration 253
IPv6 Multicast Configuration 256
IGMP/MLD Snooping IP Multicast Group 259
Multicast Router Ports 260
Forward All 260
Unregistered Multicast 261
Chapter 18: IP Configuration 263
Overview 263
IPv4 Management and Interfaces 266
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DHCP Server 283
IPv6 Management and Interfaces 291
Domain Name 304
Chapter 19: Security 309
Defining Users 310
Configuring TACACS+ 313
Configuring RADIUS 317
Management Access Method 321
Management Access Authentication 326
Secure Sensitive Data Management 327
SSL Server 327
SSH Server 329
SSH Client 330
Configuring TCP/UDP Services 330
Defining Storm Control 331
Configuring Port Security 332
802.1X 334
Denial of Service Prevention 334
DHCP Snooping 343
IP Source Guard 343
ARP Inspection 347
First Hop Security 352
Chapter 20: Security: 802.1X Authentication 353
Overview of 802.1X 353
Authenticator Overview 356
Common Tasks 364
802.1X Configuration Through the GUI 366
Defining Time Ranges 375
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Authentication Method and Port Mode Support 376
Chapter 21: Security: IPv6 First Hop Security 379
IPv6 First Hop Security Overview 380
Router Advertisement Guard 384
Neighbor Discovery Inspection 384
DHCPv6 Guard 385
Neighbor Binding Integrity 385
IPv6 Source Guard 388
Attack Protection 389
Policies, Global Parameters and System Defaults 390
Common Tasks 392
Default Settings and Configuration 394
Before You Start 394
Configuring IPv6 First Hop Security through Web GUI 395
Chapter 22: Security: Secure Sensitive Data Management 411
Introduction 411
SSD Rules 412
SSD Properties 417
Configuration Files 419
SSD Management Channels 423
Menu CLI and Password Recovery 424
Configuring SSD 424
Chapter 23: Security: SSH Client 428
Secure Copy (SCP) and SSH 428
Protection Methods 429
SSH Server Authentication 430
SSH Client Authentication 431
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Before You Begin 432
Common Tasks 432
SSH Client Configuration Through the GUI 434
Chapter 24: Security: SSH Server 438
Overview 438
Common Tasks 438
SSH Server Configuration Pages 439
Chapter 25: Access Control 443
Access Control Lists 443
MAC-based ACLs 446
IPv4-based ACLs 448
IPv6-Based ACLs 453
ACL Binding 456
Chapter 26: Quality of Service 459
QoS Features and Components 460
Configuring QoS - General 462
QoS Basic Mode 471
QoS Advanced Mode 473
Managing QoS Statistics 483
Chapter 27: SNMP 487
SNMP Versions and Workflow 487
Model OIDs 490
SNMP Engine ID 491
Configuring SNMP Views 493
Creating SNMP Groups 494
Managing SNMP Users 496
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Defining SNMP Communities 497
Defining Trap Settings 499
Notification Recipients 499
SNMP Notification Filters 503
Cisco 300 Series Managed Switches Administration Guide 9
Getting Started
This section provides an introduction to the web-based configuration utility, and
covers the following topics:
• Starting the Web-based Configuration Utility
• Quick Start Device Configuration
• Interface Naming Conventions
1
• Window Navigation
Starting the Web-based Configuration Utility
This section describes how to navigate the web-based switch configuration utility.
If you are using a pop-up blocker, make sure it is disabled.
Browser Restrictions
If you are using IPv6 interfaces on your management station, use the IPv6 global
address and not the IPv6 link local address to access the device from your
browser.
Launching the Configuration Utility
To open the web-based configuration utility:
STEP 1 Open a Web browser.
STEP 2 Enter the IP address of the device you are configuring in the address bar on the
browser, and then press Enter.
Cisco 300 Series Managed Switches Administration Guide 10
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Getting Started
Starting the Web-based Configuration Utility
NOTE When the device is using the factory default IP address of 192.168.1.254, its power
LED flashes continuously. When the device is using a DHCP-assigned IP address or
an administrator-configured static IP address, the power LED is on solid.
Logging In
The default username is cisco and the default password is cisco. The first time
that you log in with the default username and password, you are required to enter
a new password.
NOTE If you have not previously selected a language for the GUI, the language of the Login
page is determined by the language(s) requested by your browser and the
languages configured on your device. If your browser requests Chinese, for
example, and Chinese has been loaded into your device, the Login page is
automatically displayed in Chinese. If Chinese has not been loaded into your
device, the Login page appears in English.
The languages loaded into the device have a language and country code (en-US,
en-GB and so on). For the Login page to be automatically displayed in a particular
language, based on the browser request, both the language and country code of
the browser request must match those of the language loaded on the device. If the
browser request contains only the language code without a country code (for
example: fr). The first embedded language with a matching language code is
taken (without matching the country code, for example: fr_CA).
To log in to the device configuration utility:
STEP 1 Enter the username/password. The password can contain up to 64 ASCII
characters. Password-complexity rules are described in Setting Password
Complexity Rules.
STEP 2 If you are not using English, select the desired language from the Language drop-
down menu. To add a new language to the device or update a current one, see
Upgrade/Backup Firmware/Language.
STEP 3 If this is the first time that you logged on with the default user ID (cisco) and the
default password (cisco) or your password has expired, the Change Password
Page appears. See Password Expiration for additional information.
STEP 4 Choose whether to select Disable Password Complexity Enforcement or not.
For more information on password complexity, see the Setting Password
Complexity Rules section.
STEP 5 Enter the new password and click Apply.
11 Cisco 300 Series Managed Switches Administration Guide
Getting Started
!
Starting the Web-based Configuration Utility
When the login attempt is successful, the Getting Started page appears.
If you entered an incorrect username or password, an error message appears and
the Login page remains displayed on the window. If you are having problems
logging in, please see the Launching the Configuration Utility section in the
Administration Guide for additional information.
Select Don't show this page on startup to prevent the Getting Started page from
being displayed each time that you log on to the system. If you select this option,
the System Summary page is opened instead of the Getting Started page.
HTTP/HTTPS
You can either open an HTTP session (not secured) by clicking Log In, or you can
open an HTTPS (secured) session, by clicking Secure Browsing (HTTPS). You are
asked to approve the logon with a default RSA key, and an HTTPS session is
opened.
1
NOTE There is no need to input the username/password prior to clicking the Secure
Browsing (HTTPS) button.
For information on how to configure HTTPS, see SSL Server.
Password Expiration
The New Password page is displayed in the following cases:
• The first time that you access the device with the default username cisco
and password cisco. This page forces you to replace the factory default
password.
• When the password expires, this page forces you to select a new
password.
Logging Out
By default, the application logs out after ten minutes of inactivity. You can change
this default value as described in the Defining Idle Session Timeout section.
CAUTION Unless the Running Configuration is copied to the Startup Configuration, rebooting
the device removes all changes made since the last time the file was saved. Save
the Running Configuration to the Startup Configuration before logging off to
preserve any changes you made during this session.
A flashing red X icon to the left of the Save application link indicates that Running
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Getting Started
Starting the Web-based Configuration Utility
Configuration changes have not yet been saved to the Startup Configuration file.
The flashing can be disabled by clicking on the Disable Save Icon Blinking button
on the Copy/Save Configuration page
When the device auto-discovers a device, such as an IP phone (see What is a
Smartport), and it configures the port appropriately for the device. These
configuration commands are written to the Running Configuration file. This causes
the Save icon to begin blinking when the you log on, even though you did not make
any configuration changes.
When you click Save, the Copy/Save Configuration page appears. Save the
Running Configuration file by copying it to the Startup Configuration file. After this
save, the red X icon and the Save application link are no longer displayed.
To l o g o u t , c li ck Logout in the top right corner of any page. The system logs out of
the device.
When a timeout occurs or you intentionally log out of the system, a message is
displayed and the Login page appears, with a message indicating the logged-out
state. After you log in, the application returns to the initial page.
The initial page displayed depends on the “Do not show this page on startup”
option in the Getting Started page. If you did not select this option, the initial page
is the Getting Started page. If you did select this option, the initial page is the
System Summary page.
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Getting Started
Quick Start Device Configuration
Quick Start Device Configuration
To simplify device configuration through quick navigation, the Getting Started
page provides links to the most commonly used pages.
Category Link Name (on the Page) Linked Page
1
Change Management
Applications and Services
Change Device IP Address IPv4 Interface page
Create VLAN Create VLAN page
Configure Port Settings Port Setting page
Device Status System Summary System Summary page
Port Statistics Interface page
RMON Statistics Statistics page
View Log RAM Memory page
Quick Access Change Device Password User Accounts page
Upgrade Device Software Upgrade/Backup Firmware/
Backup Device Configuration Download/Backup
Create MAC Based ACL MAC Based ACL page
TCP/UDP Services page
Language page
Configuration/Log page
Create IP Based ACL IPv4 Based ACL page
Configure QoS QoS Properties page
Configure Port Mirroring Port and VLAN Mirroring page
There are two hot links on the Getting Started page that take you to Cisco web
pages for more information. Clicking on the Support link takes you to the device
product support page, and clicking on the Forums link takes you to the Support
Community page.
Cisco 300 Series Managed Switches Administration Guide 14
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Interface Naming Conventions
Within the GUI, interfaces are denoted by concatenating the following elements:
• Type of interface: The following types of interfaces are found on the various
types of devices:
- Fast Ethernet (10/100 bits)—These are displayed as FE.
- Gigabit Ethernet ports (10/100/1000 bits)—These are displayed as
GE.
- LAG (Port Channel)—These are displayed as LAG.
- VLAN—These are displayed as VLAN.
- Tunnel —These are displayed as Tunnel.
Getting Started
Interface Naming Conventions
• Interface Number: Port, LAG, tunnel or VLAN ID
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Getting Started
Window Navigation
Window Navigation
This section describes the features of the web-based switch configuration utility.
Application Header
The Application Header appears on every page. It provides the following
application links:
1
Application Link
Name
Username Displays the name of the user logged on to the device. The
Description
A flashing red X icon displayed to the left of the Save
application link indicates that Running Configuration
changes have been made that have not yet been saved to
the Startup Configuration file. The flashing of the red X can
be disabled on the Copy/Save Configuration page.
Click Save to display the Copy/Save Configuration page.
Save the Running Configuration file by copying it to the
Startup Configuration file type on the device. After this
save, the red X icon and the Save application link are no
longer displayed. When the device is rebooted, it copies
the Startup Configuration file type to the Running
Configuration and sets the device parameters according
to the data in the Running Configuration.
default username is cisco. (The default password is cisco).
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Getting Started
Window Navigation
Application Link
Name
Language Menu This menu provides the following options:
Description
• Select a language: Select one of the languages that
appear in the menu. This language will be the webbased configuration utility language.
• Download Language: Add a new language to the
device.
• Delete Language: Deletes the second language on
the device. The first language (English) cannot be
deleted.
• Debug: Used for translation purposes. If you select
this option, all web-based configuration utility labels
disappear and in their place are the IDs of the
strings that correspond to the IDs in the language
file.
NOTE To upgrade a language file, use the Upgrade/
Backup Firmware/Language page.
Logout Click to log out of the web-based switch configuration
utility.
About Click to display the device name and device version
number.
Help Click to display the online help.
The SYSLOG Alert Status icon appears when a SYSLOG
message, above the critical severity level, is logged. Click
the icon to open the RAM Memory page. After you access
this page, the SYSLOG Alert Status icon is no longer
displayed. To display the page when there is not an active
SYSLOG message, Click Status and Statistics > View
Log > RAM Memory.
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Getting Started
Window Navigation
1
Management Buttons
The following table describes the commonly-used buttons that appear on various
pages in the system.
Button Name Description
Use the pull-down menu to configure the number of
entries per page.
Indicates a mandatory field.
Add Click to display the related Add page and add an entry to a
table. Enter the information and click Apply to save it to the
Running Configuration. Click Close to return to the main
page. Click Save to display the Copy/Save Configuration
page and save the Running Configuration to the Startup
Configuration file type on the device.
Apply Click to apply changes to the Running Configuration on the
device. If the device is rebooted, the Running
Configuration is lost, unless it is saved to the Startup
Configuration file type or another file type. Click Save to
display the Copy/Save Configuration page and save the
Running Configuration to the Startup Configuration file
type on the device.
Cancel Click to reset changes made on the page.
Clear All
Interfaces
Counters
Clear Interface
Counters
Clear Logs Clears log files.
Clear Table Clears table entries.
Close Returns to main page. If any changes were not applied to
Click to clear the statistic counters for all interfaces.
Click to clear the statistic counters for the selected
interface.
the Running Configuration, a message appears.
Cisco 300 Series Managed Switches Administration Guide 18
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Getting Started
Window Navigation
Button Name Description
Copy Settings A table typically contains one or more entries containing
configuration settings. Instead of modifying each entry
individually, it is possible to modify one entry and then
copy the selected entry to multiple entries, as described
below:
1. Select the entry to be copied. Click Copy Settings to
display the popup.
2. Enter the destination entry numbers in the to field.
3. Click Apply to save the changes and click Close to
return to the main page.
Delete After selecting an entry in the table, click Delete to
remove.
Details Click to display the details associated with the entry
selected.
Edit Select the entry and click Edit. The Edit page appears,
and the entry can be modified.
1. C li ck Apply to save the changes to the Running
Configuration.
2. Click Close to return to the main page.
Go Enter the query filtering criteria and click Go. The results
are displayed on the page.
Refresh Clich Refresh to refresh the counter values.
Te st Click Te st to perform the related tests.
19 Cisco 300 Series Managed Switches Administration Guide
Getting Started
Window Navigation
1
Cisco 300 Series Managed Switches Administration Guide 20
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Getting Started
Window Navigation
21 Cisco 300 Series Managed Switches Administration Guide
Status and Statistics
This section describes how to view device statistics.
It covers the following topics:
• System Summary
• Ethernet Interfaces
• Etherlike Statistics
2
• GVRP Statistics
• 802.1X EAP Statistics
• ACL Statistics
• TCAM Utilization
• Health
• RMON
• View Log
System Summary
See System Settings.
Ethernet Interfaces
The Interface page displays traffic statistics per port. The refresh rate of the
information can be selected.
This page is useful for analyzing the amount of traffic that is both sent and
received and its dispersion (Unicast, Multicast, and Broadcast).
Cisco 300 Series Managed Switches Administration Guide 22
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Status and Statistics
Ethernet Interfaces
To display Ethernet statistics and/or set the refresh rate:
STEP 1 Click Status and Statistics > Interface.
STEP 2 Enter the parameters.
• Interface—Select the type of interface and specific interface for which
Ethernet statistics are to be displayed.
• Refresh Rate—Select the time period that passes before the interface
Ethernet statistics are refreshed.
The Receive Statistics area displays information about incoming packets.
• Tot al B y te s (O ct et s)—Octets received, including bad packets and FCS
octets, but excluding framing bits.
• Unicast Packets—Good Unicast packets received.
• Multicast Packets—Good Multicast packets received.
• Broadcast Packets—Good Broadcast packets received.
• Packets with Errors—Packets with errors received.
The Transmit Statistics area displays information about outgoing packets.
• Tot al B y te s (O ct et s)—Octets transmitted, including bad packets and FCS
octets, but excluding framing bits.
• Unicast Packets—Good Unicast packets transmitted.
• Multicast Packets—Good Multicast packets transmitted.
• Broadcast Packets—Good Broadcast packets transmitted.
To clear or view statistics counters:
• Click Clear Interface Counters to clear counters for the interface displayed.
• Click View All Interfaces Statistics to see all ports on a single page.
23 Cisco 300 Series Managed Switches Administration Guide
Status and Statistics
Etherlike Statistics
Etherlike Statistics
The Etherlike page displays statistics per port according to the Etherlike MIB
standard definition. The refresh rate of the information can be selected. This page
provides more detailed information regarding errors in the physical layer (Layer 1)
that might disrupt traffic.
To view Etherlike Statistics and/or set the refresh rate:
STEP 1 Click Status and Statistics > Etherlike.
STEP 2 Enter the parameters.
• Interface—Select the type of interface and specific interface for which
2
Ethernet statistics are to be displayed.
• Refresh Rate—Select the amount of time that passes before the Etherlike
statistics are refreshed.
The fields are displayed for the selected interface.
• Frame Check Sequence (FCS) Errors—Received frames that failed the
CRC (cyclic redundancy checks).
• Single Collision Frames—Frames that were involved in a single collision,
but were successfully transmitted.
• Late Collisions—Collisions that have been detected after the first 512 bits
of data.
• Excessive Collisions—Transmissions rejected due to excessive collisions.
• Oversize Packets—Packets greater than 2000 octets received.
• Internal MAC Receive Errors—Frames rejected because of receiver errors.
• Pause Frames Received—Received flow control pause frames.
• Pause Frames Transmitted—Flow control pause frames transmitted from
the selected interface.
To clear statistics counters:
• Click Clear Interface Counters to clear the selected interfaces counters.
• Click View All Interfaces Statistics to see all ports on a single page.
Cisco 300 Series Managed Switches Administration Guide 24
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GVRP Statistics
The GVRP page displays information regarding GARP VLAN Registration Protocol
(GVRP) frames that were sent or received from a port. GVRP is a standards-based
Layer 2 network protocol, for automatic configuration of VLAN information on
switches. It is defined in the 802.1ak amendment to 802.1Q-2005.
GVRP statistics for a port are only displayed if GVRP is enabled globally and on
the port. See the GVRP page.
To view GVRP statistics and/or set the refresh rate:
STEP 1 Click Status and Statistics > GVRP.
STEP 2 Enter the parameters.
Status and Statistics
GVRP Statistics
• Interface—Select the specific interface for which GVRP statistics are to be
displayed.
• Refresh Rate—Select the time period that passes before the GVRP
statistics page is refreshed.
The Attribute Counter block displays the counters for various types of packets per
interface.
• Join Empty—GVRP Join Empty packets received/transmitted.
• Empty—GVRP empty packets received/transmitted.
• Leave Empty—GVRP Leave Empty packets received/transmitted.
• Join In—GVRP Join In packets received/transmitted.
• Leave In—GVRP Leave In packets received/transmitted.
• Leave All—GVRP Leave All packets received/transmitted.
The GVRP Error Statistics section displays the GVRP error counters.
• Invalid Protocol ID—Invalid protocol ID errors.
• Invalid Attribute Type—Invalid attribute ID errors.
• Invalid Attribute Value—Invalid attribute value errors.
• Invalid Attribute Length—Invalid attribute length errors.
• Invalid Event—Invalid events.
25 Cisco 300 Series Managed Switches Administration Guide
Status and Statistics
802.1X EAP Statistics
To clear statistics counters:
• Click Clear Interface Counters to clear the selected counters.
• Click View All Interfaces Statistics to see all ports on a single page.
802.1X EAP Statistics
The 802.1x EAP page displays detailed information regarding the EAP (Extensible
Authentication Protocol) frames that were sent or received. To configure the
802.1X feature, see the 802.1X Properties page.
To view the EAP Statistics and/or set the refresh rate:
2
STEP 1 Click Status and Statistics > 802.1x EAP.
STEP 2 Select the Interface that is polled for statistics.
STEP 3 Select the Refresh Rate (time period) that passes before the EAP statistics are
refreshed.
The values are displayed for the selected interface.
• EAPOL Frames Received—Valid EAPOL frames received on the port.
• EAPOL Frames Transmitted—Valid EAPOL frames transmitted by the port.
• EAPOL Start Frames Received—EAPOL Start frames received on the port.
• EAPOL Logoff Frames Received—EAPOL Logoff frames received on the
port.
• EAP Response/ID Frames Received—EAP Resp/ID frames received on the
port.
• EAP Response Frames Received—EAP Response frames received by the
port (other than Resp/ID frames).
• EAP Request/ID Frames Transmitted—EAP Req/ID frames transmitted by
the port.
• EAP Request Frames Transmitted—EAP Request frames transmitted by
the port.
Cisco 300 Series Managed Switches Administration Guide 26
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Status and Statistics
ACL Statistics
• Invalid EAPOL Frames Received—Unrecognized EAPOL frames received
on this port.
• EAP Length Error Frames Received—EAPOL frames with an invalid Packet
Body Length received on this port.
• Last EAPOL Frame Version—Protocol version number attached to the most
recently received EAPOL frame.
• Last EAPOL Frame Source—Source MAC address attached to the most
recently received EAPOL frame.
To clear statistics counters:
• Click Clear Interface Counters to clear the selected interfaces counters.
• Click Refresh to refresh the selected interfaces counters.
• Click View All Interfaces Statistics to clear the counters of all interfaces.
ACL Statistics
STEP 1 Click Status and Statistics > ACL.
STEP 2 Select the Refresh Rate (time period in seconds) that passes before the page is
When the ACL logging feature is enabled, an informational SYSLOG message is
generated for packets that match ACL rules.
To view the interfaces on which packets were forward or rejected based on ACLs:
refreshed. A new group of interfaces is created for each time period.
The interfaces on which packets were forwarded or rejected based on ACL rules
are displayed.
To manage statistics counters:
• Click Refresh to reset the counters.
• Click Clear Counters to clear the counters of all interfaces.
27 Cisco 300 Series Managed Switches Administration Guide
Status and Statistics
TCAM Utilization
TCAM Utilization
The device architecture uses a Ternary Content Addressable Memory (TCAM) to
support packet actions in wire speed.
TCAM holds the rules produced by applications, such as ACLs (Access Control
Lists), Quality of Service (QoS), IP Routing and user-created rules.
Some applications allocate rules upon their initiation. Additionally, processes that
initialize during system boot use some of their rules during the startup process.
To view TCAM utilization, click Status and Statistics > TCAM Utilization.
The TCAM Utilization page shows the following fields:
2
• Maximum TCAM Entries for IPv4 and Non-IP—Maximum TCAM entries
available.
Health
• IPv4 Routing
- In Use—Number of TCAM entries used for IPv4 routing.
- Maximum—Number of available TCAM entries that can be used for IPv4
routing.
• Non-IP Rules
- In Use—Number of TCAM entries used for non-IP rules.
- Maximum—Number of available TCAM entries that can be used for non-
IP rules.
See Health.
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