Cisco Sg2008 Manual

							Viewing Statistics
System Summary
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•Port—The Internet Assigned Numbers Authority (IANA) port number for the 
service.
•IP Address—The IP address, if any, of a remote device that is connected to 
this service on the switch.
•Remote Port—The IANA port number of any remote device communicating 
with this service.
•State—The state of the service. For UDP, only connections in the Active state 
display in the table. In the Active state, a connection is established between 
the switch and a client or server. The TCP states are:
-Listen—The service is listening for connection requests.
-Active—A connection session is established and packets are being 
transmitted and received.
-Established—A connection session is established between the switch 
and a server or client, depending on each device’s role with respect to 
this protocol.
Configuring System Settings
To configure the system settings:
STEP 1Click Status and Statistics > System Summary. The System Summary page 
opens.
STEP  2Click Edit to modify the following settings:
•System Location—Enter the location where the switch is physically located.
•System Contact—Enter the name of a contact person.
•Hostname—Enter the hostname. Use only letters, digits, and hyphens. Host 
names cannot begin or end with a hyphen. No other symbols, punctuation 
characters, or blank spaces are permitted (as specified in RFC1033, 
RFC1034, and RFC1035). The default hostname is the word switch 
followed by the last three octets of the base MAC address. For example, a 
switch with a MAC address of 010203040506 has the default hostname 
switch040506.
STEP  3Click Apply. Your changes are saved to the Running Configuration. 
						

							Viewing Statistics
Inter face Statistics
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Interface Statistics
Use the Inter face page to display statistics for received and transmitted packets. 
To display this page, click Status and Statistics > Interface in the navigation 
window, or click Port Statistics under Device Status on the Getting Star ted 
page.
Select the interface (Port or LAG) for which you want to display statistics, then 
select a refresh rate for the statistics. The following information displays for the 
selected interface:
•To t a l  B y t e s  ( O c t e t s )—Total number of octets transmitted or received on the 
selected interface since the switch was last refreshed.
•Unicast Packets—Total number of unicast packets transmitted or received 
on the selected interface since the switch was last refreshed.
•Multicast Packets—Total number of multicast packets transmitted or 
received on the selected interface since the switch was last refreshed.
•Broadcast Packets—Total number of broadcast packets transmitted or 
received on the selected interface since the switch was last refreshed.
•Packets with Errors—Total number of packets with errors received on the 
selected interface since the switch was last refreshed.
•STP BPDUs—Total number of Spanning Tree Protocol (STP) Bridge Protocol 
Data Units (BPDUs) transmitted or received on the selected interface since 
the switch was last refreshed.
•RSTP BPDUs—Total number of Rapid Spanning Tree Protocol BPDUs 
transmitted or received on the selected interface since the switch was last 
refreshed.
To clear statistics counters:
Click Clear Interface Counters to reset all counters to 0 for the selected 
interface.
Click Clear All Interface Counters to reset all counters to 0 for all 
interfaces. 
						

							Viewing Statistics
Etherlike Statistics
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Etherlike Statistics
The system collects and reports statistics on ports and LAGs in accordance with 
RFC2665. 
To display this page, click Status and Statistics > Etherlike in the navigation 
window.
Select the interface (Port or LAG) for which you want to display statistics, then 
select a refresh rate for the statistics. These statistics are cumulative since the last 
time the page was refreshed. The following information displays for the selected 
interface:
•Frame Check Sequence (FCS) Errors—FCS errors received.
•Single Collision Frames—Signal collision frame errors received.
•Late Collisions—Late collision frames received.
•Excessive Collisions—Excessive collision frames received.
•Multiple Collisions—Multiple collision frames received.
•Oversize Packets—Packets received that were longer than 1518 octets 
(excluding framing bits and including FCS octets) and were otherwise well-
forme d.
•Internal MAC Receive Errors—Internal MAC errors received on the LAG or 
interface.
•Alignment Errors—Packets received with alignment errors
•Pause Frames Received—Pause frames received on the LAG or interface.
•Pause Frames Transmitted—Pause frames transmitted from the LAG or 
interface.
To clear statistics counters:
Click Clear Interface Counters to reset all counters to 0 for the selected 
interface.
Click Clear All Interface Counters to reset all counters to 0 for all 
interfaces. 
						

							Viewing Statistics
802.1X EAP Statistics
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802.1X EAP Statistics
The switch ports can be configured to use the IEEE 802.1X Extensible 
Authentication Protocol (EAP) to control network access (see 802.1X). You can use 
the 802.1X EAP page to display information about EAP packets received on a port.
To display the 802.1X EAP page, click Status and Statistics > 802.1X EAP in the 
navigation window.
STEP 1Select the Port for which you want to display statistics.
STEP  2Select a Refresh Rate for the statistics. These statistics are cumulative since the 
last time the page was refreshed. 
The following information displays for the s electe d inter fac e :
•EAPOL Frames Received—Valid Extensible Authentication Protocol over 
LAN (EAPOL) frames received on the port.
•EAPOL Frames Transmitted—EAPOL frames transmitted through the port.
•EAPOL Start Frames Received—EAPOL Start frames received on the port.
•EAPOL Logoff Frames Received—EAPOL Logoff frames received on the 
port.
•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.
To clear statistics counters:
Click Clear Interface Counters to reset all counters to 0 for the selected 
interface.
Click Clear All Interface Counters to reset all counters to 0 for all 
interfaces. 
						

							Viewing Statistics
IPv6 DHCP Statistics
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IPv6 DHCP Statistics
The switch can be configured to allow management over an IPv6 interface, and to 
receive its management IPv6 address through the Dynamic Host Configuration 
Protocol (DHCPv6). See Management Interface for information on configuring 
IPv6 and DHCP on the management interface. You can use the IPv6 DHCP 
Statistics page to display information on transmitted and received DHCPv6 
packets.
To display this page, click Status and Statistics > IPv6 DHCP Statistics in the 
navigation window.
Select a refresh rate for the page. The page displays the following statistics, which 
are cumulative since the last time the page refreshed.
•DHCPv6 Advertisement Packets Received
•DHCPv6 Reply Packets Received
•Received DHCPv6 Advertisement Packets Discarded
•Received DHCPv6 Reply Packets Discarded
•DHCPv6 Malformed Packets Received
•Total DHCPv6 Packets Received
•DHCPv6 Solicit Packets Transmitted
•DHCPv6 Request Packets Transmitted
•DHCPv6 Renew Packets Transmitted
•DHCPv6 Rebind Packets Transmitted
•DHCPv6 Release Packets Transmitted
•Total DHCPv6 Packets Transmitted
Click Clear Counters to reset all counters to 0. 
						

							Viewing Statistics
RADIUS Statistics
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RADIUS Statistics
The switch can be configured to communicate with a RADIUS server for user 
authentication. To display the RADIUS Statistics page, click 
Status and Statistics> RADIUS Statistics in the navigation window.
Select a RADIUS server from the list and select a refresh rate for the page. The 
page displays the following statistics, which are cumulative since the last time the 
page refreshed.
•Access Requests—The number of Authentication-Request packets 
transmitted to the RADIUS server. 
•Access Retransmissions—Number of Authentication-Request packets 
retransmitted to the RADIUS server.
•Access Accepts—Number of Authentication-Request packets accepted 
by the RADIUS server.
•Access Rejects—Number of Authentication-Request packets rejected by 
the RADIUS server.
•Access Challenges—Number of Access-Challenge packets sent by the 
RADIUS server to the switch.
•Malformed Access Responses—Number of reply packets from the 
RADIUS server that were malformed.
•Bad Authenticators—Number of Authentication-Request packets that 
contained invalid Message Authenticator attributes.
•Pending Requests—Number of Authentication-Request packets that were 
sent to the server and have not been replied to.
•Timeouts—Number of Authentication-Request packets that were timed out 
due to no response from the server.
•Unknown Types—Number of RADIUS packets of unknown type that were 
received by the switch.
•Packets Dropped—Number of RADIUS packets dropped by the switch.
Click Clear All Statistics to reset all counters to 0. 
						

							Viewing Statistics
RMON
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RMON
RMON (Remote Networking Monitoring) is an SNMP specification that enables an 
SNMP agent in the switch to monitor traffic statistics over a given period and send 
traps to an SNMP manager. The local SNMP agent compares actual, real-time 
counters against predefined thresholds and generates alarms, without the need 
for polling by a central SNMP management platform. This is an effective 
mechanism for proactive management, provided that you have right thresholds set 
relative to your network base line.
RMON decreases the traffic between the manager and the switch because the 
SNMP manager does not have to frequently poll the switch for information, and 
enables the manager to get timely status reports because the switch reports 
events as they occur. Use the RMON Statistics page to display details about 
switch use, such as packet processing statistics and errors that have occurred on 
the switch.
The RMON Statistics page displays detailed information regarding packet sizes 
and information regarding physical layer errors. The information shown is 
according to the RMON standard.
To view statistics:
STEP 1Click Status and Statistics > RMON > Statistics in the navigation window.
STEP  2Select the port or LAG for which you want to display statistics.
STEP  3Select a refresh rate for the page. 
The following information displays for the s electe d inter fac e :
•Bytes Received—Octets received on the interface since the switch was last 
refreshed. This number includes bad packets and FCS octets, but excludes 
framing bits.
•Drop Events—Number of times that packets have been dropped on the 
interface since the switch was last refreshed.
•Packets Received—Packets received on the interface, including bad 
packets, multicast and broadcast packets, since the switch was last 
refreshed.
•Broadcast Packets Received—Good broadcast packets received on the 
interface since the switch was last refreshed. This number does not include 
multicast packets. 
						

							Viewing Statistics
RMON
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•Multicast Packets Received—Good multicast packets received on the 
interface since the switch was last refreshed.
•CRC & Align Errors—CRC and Align errors that have occurred on the 
interface since the switch was last refreshed.
•Undersize Packets—Undersized packets (less than 64 octets) received on 
the interface since the switch was last refreshed.
•Oversize Packets—Oversized packets (over 1518 octets) received on the 
interface since the switch was last refreshed.
•Fragments—Fragments (packets with less than 64 octets, excluding 
framing bits, but including frame check sequence octets) received on the 
interface since the switch was last refreshed.
•Jabbers—Packets received that were more than 1518 octets long and had 
an FCS error during the sampling session.
•Collisions—Collisions received on the interface since the switch was last 
refreshed.
•Frames of 64 Bytes—64-byte frames received on the interface since the 
switch was last refreshed.
•Frames of 65 to 127 Bytes—65-byte to 127-byte frames received on the 
interface since the switch was last refreshed.
•Frames of 128 to 255 Bytes—128-byte to 255-byte frames received on the 
interface since the switch was last refreshed.
•Frames of 256 to 511 Bytes—256-byte to 511-byte frames received on 
the interface since the switch was last refreshed.
•Frames of 512 to 1023 Bytes—512-byte to 1023-byte frames received on 
the interface since the switch was last refreshed.
•Frames of 1024 to 1518 Bytes—1024-byte to 1518-byte frames received 
on the interface since the switch was last refreshed. 
						

							Viewing Statistics
Logs
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Logs
The switch generates messages to identify the state of the system and to assist in 
diagnosing issues that arise during switch operation. Messages might be 
generated in response to events, faults, or errors occurring on the platform and to 
changes in configuration.
Logs of these messages are stored in RAM and flash memory. Entries in the flash 
log—unlike those in RAM—are stored across reboots.
To access the log menu items, click Status and Statistics > View Log in the 
navigation window. The log menu includes the following pages:
•RAM Memory Log
•Flash Memory Log
RAM Memory Log
Use the RAM Memory page to view information about specific RAM (cache) log 
entries, including the time the log was entered, the log severity, and a description 
of the log.
To display this page, click Status and Statistics > View Log > RAM Memory in 
the navigation window.
NOTEThis page might take up to 45 seconds to display when the table contains the 
maximum number of entries.
The RAM Memory Log Table contains the following fields:
•Log Index—Numeric ID for the log entry.
•Log Time—Time at which the log was entered in the Log RAM Table.
•Severity—The log severity can be one of the following:
-Emergency (0)—System is unusable.
-Alert (1)—Action must be taken immediately.
-Critical (2)—Critical conditions.
-Error (3)—Error conditions.
-Warning (4)—Warning conditions.
-Notice (5)—Normal but significant conditions. 
						

							Viewing Statistics
Logs
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-Informational (6)—Informational messages.
-Debug (7)—Provides detailed information about an event.
You can use the Log S et tings page to select the severity levels that are 
recorded in the log.
•Component - The software component or service that produced the log 
entry.
•Description—The log description.
You can click Clear Logs to remove all log entries from RAM.
Flash Memory Log
The Flash Memory Log Files are persistent across reboots and contain information 
that includes the time the log was entered, the log severity, and a description of 
the event. Several log types are supported, and the system stores up to three 
versions of each type.
The first few log entries that might be generated during the initial powering on of 
the switch and booting from the factory default configuration might be important 
to a troubleshooter. Therefore when the switch is first booted from the factory 
default configuration, it places the first 32 messages into the Start-up log and the 
balance of the messages are logged into the Operational log. 
If the logs are cleared, the Start-up log is retained unless the switch is booted from 
the factory default configuration. Only when the switch is booted from the factory 
default configuration is the Start-up log cleared and repopulated.
To  v i e w  a  F l a s h  l o g :
STEP 1Click Status and Statistics > View Log > Flash Memory in the navigation window.
STEP  2Select a log type from the list:
•Default—Entries from the startup and operational logs. 
•Startup—The first 32 log entries created during system restarts.
•Operational—Log entries created during system operation.
STEP  3Select a log version to display.