Cisco Sg3008 Manual

							Administration: Discovery
Configuring CDP
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•Syslog Duplex Mismatch—Check to send a SYSLOG message when 
duplex information is mismatched. This means that the duplex information in 
the incoming frame does not match what the local device is advertising.
STEP  3Click Apply. The LLDP properties are defined.
Editing CDP Interface Settings
The Interface Settings page enables administrators to enable/disable CDP per 
port. Notifications can also be triggered when there are conflicts with CDP 
neighbors. The conflict can be Voice VLAN data, Native VLAN, or Duplex.
By setting these properties it is possible to select the types of information to be 
provided to devices that support the LLDP protocol.
The LLDP-MED TLVs to be advertised can be selected in the LLDP MED Interface 
Settings page. 
To define the CDP interface settings:
STEP 1Click Administration > Discovery - CDP > Interface Settings.
This page contains the following CDP information for each interface. 
•CDP Status—CDP publishing option for the port. 
•Reporting Conflicts with CDP Neighbors—Displays the status of the 
reporting options that are enabled/disabled in the Edit page (Voice VLAN/
Native VLAN/Duplex).
•No. of Neighbors—Number of neighbors detected.
The bottom of the page has four buttons:
•Copy Settings—Select to copy a configuration from one port to another.
•Edit—Fields explained in Step 2 below.
•CDP Local Information Details—Takes you to the Administration > Discovery 
- CDP > CDP Local Information page.
•CDP Neighbor Information Details—Takes you to the Administration > 
Discovery - CDP > CDP Neighbor Information page.
STEP  2Select a port and click Edit. 
						

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Configuring CDP
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This page provides the following fields:
•Interface—Select the interface to be defined.
•CDP Status—Select to enable/disable the CDP publishing option for the 
port. 
NOTEThe next three fields are operational when the device has been set up 
to send traps to the management station.
•Syslog Voice VLAN Mismatch—Select to enable the option of sending a 
SYSLOG message when a voice VLAN mismatch is detected This means 
that the voice VLAN information in the incoming frame does not match what 
the local device is advertising.
•Syslog Native VLAN Mismatch—Select to enable the option of sending a 
SYSLOG message when a native VLAN mismatch is detected. This means 
that the native VLAN information in the incoming frame does not match what 
the local device is advertising.
•Syslog Duplex Mismatch—Select to enable the option of sending a 
SYSLOG message when duplex information mismatch is detected. This 
means that the duplex information in the incoming frame does not match 
what the local device is advertising.
STEP  3Enter the relevant information, and click Apply. The port settings are written to the 
Running Configuration.
Displaying CDP Local Information
To view information that is advertised by the CDP protocol about the local device:
STEP 1Click Administration > Discovery - CDP > CDP Local Information.
STEP  2Select a local port, and the following fields are displayed:
•Interface—Number of the local port.
•CDP State—Displays whether CDP is enabled or not.
•Device ID TLV
-Device ID Type—Type of the device ID advertised in the device ID TLV.
-Device ID—Device ID advertised in the device ID TLV. 
						

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Configuring CDP
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•System Name TLV
-System Name—System name of the device.
•Address TLV
-Address1-3—IP addresses (advertised in the device address TLV).
•Por t TLV
-Port ID—Identifier of port advertised in the port TLV.
•Capabilities TLV
-Capabilities—Capabilities advertised in the port TLV)
•Ve rs i o n T LV
-Ve r s i o n—Information about the software release on which the device is 
running. 
•Platform TLV
-Platform—Identifier of platform advertised in the platform TLV.
•Native VLAN TLV
-Native VLAN—The native VLAN identifier advertised in the native VLAN 
TLV.
•Full/Half Duplex TLV
-Duplex—Whether port is half or full duplex advertised in the full/half 
duplex TLV.
•Appliance TLV
-Appliance ID—Type of device attached to port advertised in the 
appliance TLV.
-Appliance VLAN ID—VLAN on the device used by the appliance, for 
instance if the appliance is an IP phone, this is the voice VLAN.
•Extended Trust TLV
-Extended Trust—Enabled indicates that the port is trusted, meaning that 
the host/server from which the packet is received is trusted to mark the 
packets itself. In this case, packets received on such a port are not re-
marked. Disabled indicates that the port is not trusted in which case, the 
following field is relevant. 
						

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Configuring CDP
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•CoS for Untrusted Ports TLV
-CoS for Untrusted Ports—If Extended Trust is disabled on the port, this 
fields displays the Layer 2 CoS value, meaning, an 802.1D/802.1p priority 
value. This is the COS value with which all packets received on an 
untrusted port are remarked by the device.
•Power TLV
-Request ID—Last power request ID received echoes the Request-ID 
field last received in a Power Requested TLV. It is 0 if no Power 
Requested TLV was received since the interface last transitioned to Up. 
-Power Management ID—Value incremented by 1 (or 2, to avoid 0) each 
time any one of the following events occur:
Available-Power or Management Power Level fields change value
A Power Requested TLV is received with a Request-ID field which is 
different from the last-received set (or when the first value is received)
The interface transitions to Down
-Available Power—Amount of power consumed by port.
-Management Power Level—Displays the suppliers request to the 
powered device for its Power Consumption TLV. The device always 
displays “No Preference” in this field.
Displaying CDP Neighbors Information
The CDP Neighbors Information page displays CDP information received from 
neighboring devices.
After timeout (based on the value received from the neighbor Time To Live TLV 
during which no CDP PDU was received from a neighbor), the information is 
deleted.
To view the CDP neighbors information:
STEP 1Click Administration > Discovery - CDP > CDP Neighbor Information.
This page contains the following fields for the link partner (neighbor):
•Device ID—Neighbors device ID. 
						

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Configuring CDP
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•System Name—Neighbors system name.
•Local Interface—Number of the local port to which the neighbor is 
connected.
•Advertisement Version—CDP protocol version.
•Time to Live (sec)—Time interval (in seconds) after which the information for 
this neighbor is deleted.
•Capabilities—Capabilities advertised by neighbor.
•Platform—Information from Platform TLV of neighbor.
•Neighbor Interface—Outgoing interface of the neighbor.
STEP  2Select a device, and click Details.
This page contains the following fields about the neighbor: 
•Device ID—Identifier of the neighboring device ID.
•System Name—Name of the neighboring device ID.
•Local Interface—Interface number of port through which frame arrived.
•Advertisement Version—Version of CDP.
•Ti m e  t o  L i v e—Time interval (in seconds) after which the information for this 
neighbor is deleted.
•Capabilities—Primary functions of the device. The capabilities are indicated 
by two octets. Bits 0 through 7 indicate Other, Repeater, Bridge, WLAN AP, 
Router, Telephone, DOCSIS cable device, and station respectively. Bits 8 
through 15 are reser ved. 
•Platform—Identifier of the neighbors platform.
•Neighbor Interface—Interface number of the neighbor through which frame 
arrived.
•Native VLAN—Neighbors native VLAN.
•Duplex—Whether neighbors interface is half or full duplex.
•Addresses—Neighbors addresses.
•Power Drawn—Amount of power consumed by neighbor on the interface.
•Ve r s i o n—Neighbors software version. 
						

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Configuring CDP
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NOTEClicking on the Clear Table button disconnect all connected devices if from CDP, 
and if Auto Smartport is enabled change all port types to default.
Viewing CDP Statistics
The CDP Statistics page displays information regarding Cisco Discovery Protocol 
(CDP) frames that were sent or received from a port. CDP packets are received 
from devices attached to the switches interfaces, and are used for the Smartport 
feature. S e e Configuring CDP for more information.
CDP statistics for a port are only displayed if CDP is enabled globally and on the 
port. This is done in the CDP Properties page and the CDP Interface Settings 
page.
To  v i e w  C D P  s t a t i s t i c s :
STEP 1Click Administration > Discovery - CDP > CDP Statistics.
The following fields are displayed for every interface:.
Packets Received/ Transmitted:
•Version 1—Number of CDP version 1 packets received/transmitted.
•Version 2—Number of CDP version 2 packets received/transmitted.
•To t a l—Total number of CDP packets received/transmitted.
The CDP Error Statistics section displays the CDP error counters.
•Illegal Checksum—Number of packets received with illegal checksum 
value.
•Other Errors—Number of packets received with errors other than illegal 
checksums.
•Neighbors Over Maximum—Number of times that packet information could 
not be stored in cache because of lack of room.
To clear all counters on all interfaces, click Clear All Interface Counters. To clear 
all counters on an interface, select it and click Clear All Interface Counters.  
						

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Configuring CDP
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Configuring CDP
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Port Management
This section describes port configuration, link aggregation, and the Green 
Ethernet feature.
It covers the following topics:
•Configuring Ports
•Setting Port Configuration
•Link Aggregation
•UDLD
•Configuring Green Ethernet
Configuring Ports
To configure ports, perform the following actions:
1. Configure port by using the Port Settings page.
2. Enable/disable the Link Aggregation Control (LAG) protocol, and configure the 
potential member ports to the desired LAGs by using the LAG Management 
page. By default, all LAGs are empty. 
3. Configure the Ethernet parameters, such as speed and auto-negotiation for the 
LAGs by using the LAG Settings page.
4. Configure the LACP parameters for the ports that are members or candidates 
of a dynamic LAG by using the LACP page.
5. Configure Green Ethernet and 802.3 Energy Efficient Ethernet by using the 
Properties page.
6. Configure Green Ethernet energy mode and 802.3 Energy Efficient Ethernet per 
port by using the Port Settings page. 
						

							Port Management
Setting Port Configuration
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7. If PoE is supported and enabled for the device, configure the device as 
described in Port Management: PoE.
Setting Port Configuration
Ports can be configured in the following pages.
Port Settings
The Port Settings page displays the global and per port setting of all the ports. 
This page enables you to select and configure the desired ports from the Edit Port 
Settings page. 
To configure port settings:
STEP 1Click Port Management > Port Settings.
STEP  2Select Jumbo Frames to support packets of up to 10 Kb in size. If Jumbo Frames 
is not enabled (default), the system supports packet size up to 2,000 bytes. For 
jumbo frames to take effect, the device must be rebooted after the feature is 
enabled.
STEP  3Click Apply to update the global setting. 
Jumbo frames configuration changes take effect only after the Running 
Configuration is explicitly saved to the Startup Configuration File using the Copy/
Save Configuration page, and the device is rebooted.
STEP  4To update the port settings, select the desired port, and click Edit.
STEP  5Modify the following parameters:
•Port—Select the port number.
•Port Description—Enter the port user-defined name or comment.
•Port Type—Displays the port type and speed. The possible options are:
-Copper Por ts—Regular, not Combo, support the following values: 10M, 
100M, and 1000M (type: Copper).
-Combo Por ts Copper—Combo port connected with copper CAT5 
cable, supports the following values: 10M, 100M, and 1000M (type: 
ComboC).