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Chapter 5
Advanced Configuration
45
8-Port 10/100 Ethernet Switch with Webview
Spanning Tree > MSTP Instance Settings
Spanning Tree > MSTP Instance Settings
MSTP operation maps VLANs into STP instances. Packets
assigned to various VLANs are transmitted along different
paths within Multiple Spanning Trees Regions (MST
Regions). Regions are one or more Multiple Spanning
Tree bridges by which frames can be transmitted. In
configuring MST, the MST region to which the device
belongs is defined. A configuration consists of the name,
revision, and region to which the device belongs.
Network Administrators can define MSTP Instances
settings using the MSTP Instance Settings screen.
Instance ID
Defines the VLAN group to which the
interface is assigned.
Included VLAN
Maps the selected VLAN to the selected
instance. Each VLAN belongs to one instance.
Bridge Priority
Specifies the selected spanning tree
instance device priority. The field range is 0-61440.
Designated Root Bridge ID
Indicates the ID of the bridge
with the lowest path cost to the instance ID.
Root Port
Indicates the selected instance’s root port.
Root Path Cost
Indicates the selected instance’s path
cost.
Bridge ID
Indicates the bridge ID of the selected
instance.
Remaining Hops
Indicates the number of hops remaining
to the next destination.
Spanning Tree > MSTP Interface Settings
Spanning Tree > MSTP Interface Settings
Network Administrators can assign MSTP Interface settings
using the MSTP Interface Settings screen.
The MSTP Interface Settings screen contains the following
fields:
Instance ID
Lists the MSTP instances configured on the
device. Possible field range is 0-15.
Interface
Displays the interface for which the MSTP
settings are displayed. The possible field values are:
Port
Specifies the port for which the MSTP settings
are displayed.
LAG
Specifies the LAG for which the MSTP settings
are displayed.
Port State
Indicates whether the port is enabled for the
specific instance.
Type
Indicates if the port is a point-to-point port, or a
port connected to a hub. The possible field values are:
Boundary Port
Indicates the port is a boundary port.
A Boundary port attaches MST bridges to LAN in an
outlying region. If the port is a boundary port, it also
indicates whether the device on the other side of the
link is working in RSTP or STP mode.
Master Port
Indicates the port is a master port. A
Master port provides connectivity from a MSTP region
to the outlying CIST root.
Internal
Indicates the port is an internal port.
Role
Indicates the port role assigned by the STP algorithm
in order to provide to STP paths. The possible field values are:
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Root
Provides the lowest cost path to forward packets
to root device.
Designated
Indicates the port or LAG via which the
designated device is attached to the LAN.
Alternate
Provides an alternate path to the root
device from the root interface.
Backup
Provides a backup path to the designated
port path toward the Spanning Tree leaves. Backup
ports occur only when two ports are connected in a
loop by a point-to-point link. Backup ports also occur
when a LAN has two or more connections connected
to a shared segment.
Disabled
Indicates the port is not participating in the
Spanning Tree.
Mode
Indicates the current Spanning Tree mode. The
Spanning Tree mode is selected in the Global STP screen.
The possible field values are:
Classic STP
Indicates that Classic STP is enabled on
the device.
Rapid STP
Indicates that Rapid STP is enabled on the
device.
Multiple STP
Indicates that Multiple STP is enabled
on the device.
Interface Priority
Defines the interface priority for
specified instance. The default value is
128
.
Path Cost
Indicates the port contribution to the Spanning
Tree instance. The range should always be 1-200,000,000.
Designated Bridge ID
Indicates that the bridge ID
number that connects the link or shared LAN to the root.
Designated Port ID
Indicates that the Port ID number on
the designated bridge that connects the link or the shared
LAN to the root.
Designated Cost
Indicates that the default path cost
is assigned according to the method selected on the
Spanning Tree Global Settings screen.
Forward Transitions
Indicates the number of times
the port has changed from Forwarding state to Blocking
state.
Remaining Hops
Indicates the hops remaining to the
next destination.
Multicast > IGMP Snooping
Multicast > IGMP Snooping
When IGMP Snooping is enabled globally, all IGMP packets
are forwarded to the CPU. The CPU analyzes the incoming
packets and determines:
Which ports want to join which Multicast groups?
Which ports have Multicast routers generating IGMP
queries?
Which routing protocols are forwarding packets and
Multicast traffic?
Ports requesting to join a specific Multicast group issue an
IGMP report, specifying that Multicast group is accepting
members. This results in the creation of the Multicast
filtering database.
Enable IGMP Snooping
Indicates if IGMP Snooping is
enabled on the device. IGMP Snooping can be enabled
only if Bridge Multicast Filtering is enabled.
VLAN ID
Specifies the VLAN ID.
IGMP Status
Indicates if IGMP snooping is enabled on
the VLAN.
Auto Learn
Indicates if Auto Learn is enabled on the
device. If Auto Learn is enabled, the device automatically
learns where other Multicast groups are located. Enables
or disables Auto Learn on the Ethernet device.
Host Timeout
Indicates the amount of time host waits to
receive a message before timing out. The default time is
260
seconds.
MRouter Timeout
Indicates the amount of the time the
Multicast router waits to receive a message before it times
out. The default value is
300
seconds.
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Leave Timeout
Indicates the amount of time the host
waits, after requesting to leave the IGMP group and not
receiving a Join message from another station, before
timing out. If a Leave Timeout occurs, the switch notifies
the Multicast device to stop sending traffic The Leave
Timeout value is either user-defined, or an immediate
leave value. The default timeout is
10
seconds.
Multicast > Bridge Multicast
Multicast > Global Settings
The
Bridge Multicast
screen displays the ports and LAGs
attached to the Multicast service group in the Ports and
LAGs tables. The Port and LAG tables also reflect the
manner in which the port or LAGs joined the Multicast
group. Ports can be added either to existing groups or to
new Multicast service groups. The Bridge Multicast screen
permits new Multicast service groups to be created. The
Bridge Multicast screen also assigns ports to a specific
Multicast service address group.
The
Bridge Multicast
screen is divided into two areas,
Configuring Multicast and Multicast Table. The fields are
the same for both areas.
VLAN ID
Identifies a VLAN to be configured to a Multicast
service.
Bridge Multicast Address
Identifies the Multicast group
MAC address/IP address.
Bridge IP Multicast
DIsplays the port that can be added
to a Multicast service.
LAG
Displays LAG that can be added to a Multicast
service.
The configuration options are as follows:
Static
Indicates
the
port
is
user-defined.
Dynamic
Indicates
the
port
is
configured
dynamically.
Forbidden
Forbidden ports are not included the
Multicast group, even if IGMP snooping designated
the port to join a Multicast group.
None
The port is not configured for Multicast service.
The
Add to List
button adds the configured RMON event
to the Event Table at the bottom of the screen.
Multicast > Bridge Multicast Forward All
Multicast > Multicast Forward All
The
Bridge Multicast Forward All
screen contains fields
for attaching ports or LAGs to a device that is attached
to a neighboring Multicast router/switch. Once IGMP
Snooping is enabled, Multicast packets are forwarded to
the appropriate port or VLAN.
The
Bridge Multicast Forward All
screen contains the
following fields:
VLAN
ID
DIsplays
the
VLAN
for
which
Multicast
parameters are displayed.
The configuration options are as follows:
None
The port is not configured for Multicast service.
Forbidden
Forbidden ports are not included the
Multicast group, even if IGMP snooping designated
the port to join a Multicast group.
Static
Indicates the port is user-defined.
Dynamic
Indicates
the
port
is
configured
dynamically.
SNMP > Global Parameters
The
Global Parameters
screen contains parameters for
defining SNMP notification parameters.
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SNMP > Global Parameters
Local Engine ID
Indicates the local device engine ID. The
field value is a hexadecimal string. Each byte in hexadecimal
character strings consists of two hexadecimal digits. Each
byte can be separated by a period or a colon. The Engine
ID must be defined before SNMPv3 is enabled. For stand-
alone devices, select a default Engine ID that is comprised
of Enterprise number and the default MAC address. For a
stackable system configure the Engine ID, and verify that
the Engine ID is unique for the administrative domain.
This prevents two devices in a network from having the
same Engine ID.
Use Default
Uses the device generated Engine ID. The
default Engine ID is based on the device MAC address and
is defined per standard as:
First 4 octets — first bit = 1, the rest is IANA Enterprise
number.
Fifth octet — Set to 3 to indicate the MAC address that
follows.
Last 6 octets — MAC address of the device.
SNMP Notifications
Indicates if the device can send
SNMP notifications.
Authentication
Notifications
Indicates
if
SNMP
Authentication failure notification is enabled on the
device.
SNMP > Views
SNMP > Views
SNMP Views provide access or block access to device
features or feature aspects. For example, a view can be
defined that states that SNMP Group A has Read Only
(R/O) access to Multicast groups, while SNMP Group B
has Read-Write (R/W) access to Multicast groups. Feature
access is granted via the MIB name, or MIB Object ID.\
View Name
Displays the user-defined views. The options
are as follows:
Default
Displays the default SNMP view for read and
read/write views.
DefaultSuper
Displays the default SNMP view for
administrator views.
Subtree ID Tree
Indicates the device feature OID included
or excluded in the selected SNMP view. The options to
select the Subtree are as follows:
Select from List
Select the Subtree from the list
provided.
Insert
Enables a Subtree not included in the Select
from List field to be entered.
View Type
Indicates if the defined OID branch will be
included or excluded in the selected SNMP view.
The
Add to List
button adds the Views configuration to
the Views Table at the bottom of the screen.
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SNMP > Group Profile
SNMP > Group Profile
The
Group Profile
screen provides information for creating
SNMP groups and assigning SNMP access control privileges
to SNMP groups. Groups allow network managers to
assign access rights to specific device features, or features
aspects.
Group Name
Displays the user-defined group to which
access control rules are applied. The field range is up to
30 characters.
Security Model
Defines the SNMP version attached to
the group. The possible field values are:
SNMPv1
SNMPv1 is defined for the group.
SNMPv2
SNMPv2 is defined for the group.
SNMPv3
SNMPv3 is defined for the group.
Security Level
Defines the security level attached to the
group. Security levels apply to SNMPv3 only. The possible
field values are:
No
Authentication
Indicates
that
neither
the
Authentication nor the Privacy security levels are
assigned to the group.
Authentication
Authenticates SNMP messages, and
ensures the SNMP messages origin is authenticated.
Privacy
Encrypts SNMP messages.
Operation
Defines the group access rights. The possible
field values are:
Read
The management access is restricted to read-
only, and changes cannot be made to the assigned
SNMP view.
Write
The management access is read-write and
changes can be made to the assigned SNMP view.
Notify
Sends traps for the assigned SNMP view.
SNMP > Group Membership
SNMP > Group Membership
The
Group Membership
screen provides information
for assigning SNMP access control privileges to SNMP
groups.
User name
Provides a user-defined local user list.
Engine ID
Indicates either the local or remote SNMP entity
to which the user is connected. Changing or removing the
local SNMP Engine ID deletes the SNMPv3 User Database.
Local
Indicates that the user is connected to a local
SNMP entity.
Remote
Indicates that the user is connected to a
remote SNMP entity. If the Engine ID is defined, remote
devices receive inform messages.
Group Name
Contains a list of user-defined SNMP
groups. SNMP groups are defined in the SNMP Group
Profile page.
Authentication Method
Indicates the Authentication
method used. The possible field values are:
None
Indicates that no authentication method is
used to authenticate the port.
MD5 Password
Indicates that port authentication
is
performed
via
HMAC-MD5-96
password
authentication.
SHA Password
Indicates that port authentication
is
performed
via
HMAC-SHA-96
password
authentication.
MD5
Key
Indicates
that
port
authentication
is
performed via the HMAC-MD5 algorithm.
SHA
Key
Indicates
that
port
authentication
is

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