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Page 81 / 104 Scroll up to view Page 76 - 80
73
Chapter 5: Configuring the Switch through the Web Utility
Spanning Tree
24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet
Configuration
Configure the global settings for STA using this screen. Global settings apply to the entire switch.
Modify the required attributes for STA.
Click
Submit
to save the changes.
Port/LAG Info
The Port Information and LAG Information screens display the current status of ports and lags in the Spanning
Tree.
Figure 5-61: Spanning Tree - Port/LAG Info
Figure 5-60: Spanning Tree - Configuration
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74
Chapter 5: Configuring the Switch through the Web Utility
Spanning Tree
24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet
Port/LAG Conf
You can configure RSTP attributes for specific interfaces, including port priority, path cost, link type, and edge
port. You may use a different priority or path cost for ports of the same media type to indicate the preferred path,
link type to indicate a point-to-point connection or shared-media connection, and edge port to indicate if the
attached device can support fast forwarding. (References to “ports” in this section means “interfaces,” which
includes both ports and lags.)
Modify the required attributes.
Click
Submit
to save the changes.
Figure 5-62: Spanning Tree - Information
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75
Chapter 5: Configuring the Switch through the Web Utility
SNMP
24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet
SNMP
Simple Network Management Protocol (SNMP) is a communication protocol designed specifically for managing
devices on a network. Equipment commonly managed with SNMP includes switches, routers and host
computers. SNMP is typically used to configure these devices for proper operation in a network environment, as
well as to monitor them to evaluate performance or detect potential problems.
Traps indicating status changes are issued by the switch to specified trap managers. You must specify trap
managers so that key events are reported by this switch to your management station (using network
management platforms such as HP OpenView). You can specify up to five management stations that will receive
authentication failure messages and other notification messages from the switch.
The SNMP tab displays the SNMP Config screen.
SNMP Config
Add up to five new community strings, select the access rights from the Access Mode drop-down menu,. These
strings act as passwords. They are case-sensitive and can be up to 32 characters long. Some default strings are
"public", specifying read-only access, and "private", allowing read/write access. Once this is entered, click
Add
.
Enter the IP address and community string for each management station that will receive trap messages. Strings
are case-sensitive and can be up to 32 characters long. Specify the trap version and click
Add
. Enable SNMP and
select the trap types required using the check boxes for Authentication and Link-up/down traps.
Click
Submit
to save the changes.
Figure 5-63: SNMP - SNMP Config
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76
Chapter 5: Configuring the Switch through the Web Utility
IGMP
24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet
IGMP
The Internet Group Management Protocol (IGMP) runs between hosts and their immediately adjacent multicast
router/switch. IGMP is a multicast host registration protocol that allows any host to inform its local router that it
wants to receive transmissions addressed to a specific multicast group.
A router, or multicast-enabled switch, can periodically ask their hosts if they want to receive multicast traffic. If
there is more than one router/switch on the LAN performing IP multicasting, one of these devices is elected
“querier” and assumes the role of querying the LAN for group members. It then propagates the service requests
on to any adjacent multicast switch/router to ensure that it will continue to receive the multicast service.
Based on the group membership information learned from IGMP, a router/switch can determine which (if any)
multicast traffic needs to be forwarded to each of its ports. At Layer 3, multicast routers use this information,
along with a multicast routing protocol such as DVMRP or PIM, to support IP multicasting across the Internet.
Note that IGMP neither alters nor routes IP multicast packets. A multicast routing protocol must be used to deliver
IP multicast packets across different subnetworks.
The IGMP tab includes links to the following screens.
•
IGMP Conf
•
IGMP Router Info
•
IGMP Router Conf
•
IP Multicast Reg Table
•
IGMP Member Conf
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77
Chapter 5: Configuring the Switch through the Web Utility
IGMP
24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet
IGMP Conf
Adjust the IGMP settings as required.
IGMP Status
. When enabled, the switch will monitor network traffic to determine which hosts want to receive
multicast traffic. This is also referred to as IGMP Snooping. (Default: Enabled).
Act as IGMP Querier
. When enabled, the switch can serve as the Querier, which is responsible for asking hosts
if they want to receive multicast traffic. (Default: Enabled).
IGMP Query Count
. Sets the maximum number of queries issued for which there has been no response before
the switch takes action to drop a client from the multicast group. (Range: 2-10; Default: 2)
IGMP Query Interval.
Sets the frequency at which the switch sends IGMP host-query messages.
(Range: 60-125 seconds; Default: 125)
IGMP Report Delay
. Sets the time between receiving an IGMP Report for an IP multicast address on a port before
the switch sends an IGMP Query out of that port and removes the entry from its list.
(Range: 5-25 seconds; Default: 10)
IGMP Query Timeout
. The time the switch waits after the previous querier stops before it considers the router
port (i.e., the interface which had been receiving query packets) to have expired.
(Range: 300-500 seconds; Default: 300)
IGMP Version
. Sets the protocol version for compatibility with other devices on the network.
(Range: 1-2; Default: 2)
Click
Submit
to save the changes.
Figure 5-64: IGMP - IGMP Conf

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