D-Link DES-6500 Router Manual PDF (Setup & Configuration Guide)

Page 141 / 216 Scroll up to view Page 136 - 140

D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch

123

The following fields can be set:

Parameter

Description

Interface

Name<

System

>

Displays the name of the IP interface for which DVMRP is to be configured.

This must be a previously defined IP interface.

IP Address

Displays the IP address corresponding to the IP Interface name entered

above.

Neighbor Timeout

Interval <

35

>

This field allows an entry between

1

and

65,535

seconds and defines the

time period for DVMRP will hold Neighbor Router reports before issuing

poison route messages. The default is

35

seconds

.

Probe Interval <

10

>

This field allows an entry between

0

and

65,535

seconds and defines the

interval between ‘probes’. The default is

10

.

Metric <

1

>

This field allows an entry between

1

and

31

and defines the route cost for

the IP interface.

The DVMRP route cost is a relative number that

represents the real cost of using this route in the construction of a multicast

delivery tree. It is similar to, but not defined as, the hop count in RIP. The

default cost is

1

.

State <

Disabled

>

This field can be toggled between

Enabled

and

Disabled

and enables or

disables DVMRP for the IP interface. The default is

Disabled

.

PIM_DM Interface Configuration

The Protocol Independent Multicast – Dense Mode (PIM-DM) protocol should be used in

networks with a low delay (low latency) and high bandwidth as PIM-DM is optimized to

guarantee delivery of multicast packets, not to reduce overhead.

The PIM-DM multicast routing protocol is assumes that all downstream routers want to

receive multicast messages and relies upon explicit prune messages from downstream routers

to remove branches from the multicast delivery tree that do not contain multicast group

members.

PIM-DM has no explicit ‘join’ messages. It relies upon periodic flooding of multicast

messages to all interfaces and then either waiting for a timer to expire (the

Join/Prune

Interval

) or for the downstream routers to transmit explicit ‘prune’ messages indicating that

there are no multicast members on their respective branches. PIM-DM then removes these

branches (‘prunes’ them) from the multicast delivery tree.

Because a member of a pruned branch of a multicast delivery tree may want to join a

multicast delivery group (at some point in the future), the protocol periodically removes the

‘prune’ information from its database and floods multicast messages to all interfaces on that

branch. The interval for removing ‘prune’ information is the

Join/Prune Interval

.

Page 142 / 216

D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch

124

Enabling PIM-DM

PIM-DM can be

Enabled

or

Disabled

, globally on the switch, using the

PIM-DM

Configuration

link to open the

PIM-DM Global Setting

page, as shown below.

Figure 4- 81. PIM-DM Global Setting Page

Select

Enabled

or

Disabled

, as appropriate.

To view the

PIM-DM Table

, open the

IP Multicasting

folder under

Configuration

and click

PIM-DM Interface Configuration

. This window allows the

PIM-DM

to be configured for

each IP interface defined on the switch. Each IP interface configured on the switch is

displayed in the below

DVMRP Interface Table

dialog box.

To configure PIM-DM for a

particular interface, click the corresponding hyperlink for that IP interface.

This will open the

PIM-DM Interface Configuration

window:

Figure 4- 82. PIM-DM Interface Table

Figure 4- 83. PIM-DM Interface Configuration window

The following fields can be set:

Parameter

Description

Interface Name

Allows the entry of the name of the IP interface for which PIM-DM is to be

configured

This must be a previously defined IP interface

Page 143 / 216

D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch

125

configured.

This must be a previously defined IP interface.

IP Address

Displays the IP address for the IP interface named above.

Hello Interval <

30

>

This field allows an entry of between

0

and

18724

seconds and determines

the interval between sending Hello packets to other routers on the network.

The default is

30

seconds.

Join/Prune Interval

<

60

>

This field allows an entry of between

0

and

18724

seconds.

This interval

also determines the time interval the router uses to automatically remove

prune information from a branch of a multicast delivery tree and begin to

flood multicast messages to all branches of that delivery tree. These two

actions are equivalent. The default is

60

seconds.

State <

Disabled

>

This field can be toggled between

Enabled

and

Disabled

using the pull-

down menu, and is used to enable or disable PIM-DM for the IP interface.

The default is

Disabled

.

Page 144 / 216

D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch

126

Section 5

Managing SNMP

SNMP Settings

SNMP User Table

SNMP View Table

SNMP Group Table

SNMP Community Table

SNMP Host Table

SNMP Engine ID

SNMP Settings

Simple Network Management Protocol (SNMP) is an OSI Layer 7 (Application Layer)

designed specifically for managing and monitoring network devices. SNMP enables network

management stations to read and modify the settings of gateways, routers, switches, and other

network devices.

Use SNMP to configure system features for proper operation, monitor

performance and detect potential problems in the switch, switch group or network.

Managed devices that support SNMP include software (referred to as an agent), which runs

locally on the device. A defined set of variables (managed objects) is maintained by the

SNMP agent and used to manage the device. These objects are defined in a Management

Information Base (MIB), which provides a standard presentation of the information controlled

by the on-board SNMP agent. SNMP defines both the format of the MIB specifications and

the protocol used to access this information over the network.

The DES-6500 supports the SNMP versions 1, 2c, and 3.

You can specify which version of

the SNMP you want to use to monitor and control the switch.

The three versions of SNMP

vary in the level of security provided between the management station and the network

device.

In SNMP v.1 and v.2, user authentication is accomplished using ‘community strings’, which

function like passwords.

The remote user SNMP application and the switch SNMP must use

the same community string. SNMP packets from any station that has not been authenticated

are ignored (dropped).

The default community strings for the switch used for SNMP v.1 and v.2 management access

are:

public

- Allows authorized management stations to retrieve MIB objects.

private

- Allows authorized management stations to retrieve and modify MIB objects.

Page 145 / 216

D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch

127

SNMP v.3 uses a more sophisticated authentication process that is separated into two parts.

The first part is to maintain a list of users and their attributes that are allowed to act as SNMP

managers. The second part describes what each user on that list can do as an SNMP manager.

The switch allows groups of users to be listed and configured with a shared set of privileges.

The SNMP version may also be set for a listed group of SNMP managers. Thus, you may

create a group of SNMP managers that are allowed to view read-only information or receive

traps using SNMP v.1 while assigning a higher level of security to another group, granting

read/write privileges using SNMP v.3.

Using SNMP v.3 individual users or groups of SNMP managers can be allowed to perform or

be restricted from performing specific SNMP management functions. The functions allowed

or restricted are defined using the Object Identifier (OID) associated with a specific MIB. An

additional layer of security is available for SNMP v.3 in that SNMP messages may be

encrypted. To read more about how to configure SNMP v.3 settings for the switch read the

next section, Management.

Traps

Traps are messages that alert network personnel of events that occur on the Switch. The

events can be as serious as a reboot (someone accidentally turned OFF the Switch), or less

serious like a port status change. The Switch generates traps and sends them to the trap

recipient (or network manager). Typical traps include trap messages for Authentication

Failure, and Topology Change.

MIBs

Management and counter information are stored by the switch in the Management

Information Base (MIB). The Switch uses the standard MIB-II Management Information Base

module. Consequently, values for MIB objects can be retrieved from any SNMP-based

network management software. In addition to the standard MIB-II, the Switch also supports

its own proprietary enterprise MIB as an extended Management Information Base. The

proprietary MIB may also be retrieved by specifying the MIB Object Identifier. MIB values

can be either read-only or read-write.

The DES-6500 incorporates a flexible SNMP management for the switching environment.

SNMP management can be customized to suit the needs of the networks and the preferences

of the network administrator. Use the SNMP V3 menus to select the SNMP version used for

specific tasks.

The DES-6500 supports the Simple Network Management Protocol (SNMP) versions 1, 2c,

and 3.

The administrator can specify the SNMP version used to monitor and control the

switch.

The three versions of SNMP vary in the level of security provided between the

management station and the network device.

SNMP settings are configured using the menus located on the SNMP V3 folder of the web

manager. Workstations on the network that are allowed SNMP privileged access to the switch

can be restricted with the Management Station IP Address menu.

Rate

Popular D-Link Models

Famous Router IPs

Famous Router Companies

Bookmark Our Site

Share