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D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch
173
Figure 6- 28. Browse IP Multicast Forwarding Table
Browse IGMP Group Table
The
Browse IGMP Group Table
window may be found in the
Monitoring
menu in the
Layer 3 Feature
folder. This window will show current IGMP group entries on the Switch.
To search a specific IGMP group entry, enter an interface name into the
Interface Name
field
or a
Multicast Group
IP address and click
Find
.
Figure 6- 29. Browse IGMP Group Table
OSPF Monitoring
This section offers windows regarding OSPF (Open Shortest Path First) information on the
Switch, including the
OSPF LSDB Table
,
OSPF Neighbor Table
and the
OSPF Virtual
Neighbor Table
. To view these Tables, open the
Monitoring
folder and click
OSPF
Monitoring
.
Browse OSPF LSDB Table
This table can be found in the
OSPF Monitoring
folder by clicking on the
OSPF LSDB
Table
link. The Link-State Database table displays the current link-state database in use by
the OSPF routing protocol on a per-OSPF area basis.
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D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch
174
Figure 6- 30. OSPF LSDB Table
The user may search for a specific entry by entering the following information into the fields
at the top of the screen:
To browse the OSPF LSDB Table, you first must select which browse method you want to
use. The choices are
All
,
Area ID
,
Advertise Router ID
,
LSDB, Area ID and Advertise Router
ID, Area ID and LSDB,
and
Advertise Router ID and LSDB
.
If
All
is selected, the entire OSPF LSDB table will be displayed.
If
Area ID
is selected as the browse method, you must enter the IP address in the
Area ID
field, and then click
Find
.
If
Adv. Router ID
is selected, you must enter the IP address in the
Advertise Router ID
field,
and then click
Find
.
If
LSDB Type
is selected, you must select the type of link state (
RTRLink
,
NETLink,
Summary
,
ASSummary
, and
ASExtLink
) in the
LSDB Type
field, and then click
Find
.
The following fields are displayed:
Parameter
Description
Area ID
Allows the entry of an OSPF Area ID.
This Area ID will then be used to search
the table, and display an entry
if there is one.
LSDB Type
Displays which one of eight types of link advertisements by which the current
link was discovered by the switch:
All
, Router link (
RTRLink
), Network link
(
NETLink
), Summary link (
Summary
), Autonomous System link (
ASSummary
),
Autonomous System external link (
ASExternal)
, MCGLink (
Multicast Group
),
and NSSA (
Not So Stubby Area
)
Adv. Router ID
Displays the Advertising Router’s ID.
Link State ID
This field identifies the portion of the Internet environment that is being
described by the advertisement. The contents of this field depend on the
advertisement's LS type.
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D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch
175
LS Type
Link State ID
____________________________________________
1
The originating router's Router ID.
2
The IP interface address of the network's Designated Router.
3
The destination network's IP address.
4
The Router ID of the described AS boundary router.
Cost
Displays the cost of the table entry.
Sequence
Displays a sequence number corresponding to number of times the current link
has been advertised as changed.
OSPF Neighbor Table
This table can be found in the
OSPF Monitoring
folder by clicking on the
OSPF Neighbor
Table
link. Routers that are connected to the same area or segment become neighbors in that
area.
Neighbors are elected via the Hello protocol.
IP multicast is used to send out Hello
packets to other routers on the segment.
Routers become neighbors when they see themselves
listed in a Hello packet sent by another router on the same segment.
In this way, two-way
communication is guaranteed to be possible between any two neighbor routers. This table
displays OSPF neighbors of the Switch.
The table can be searched by the IP address of the
Neighbor Router.
Enter the Neighbor Router’s IP address and click the
Find
button.
Figure 6- 31. OSPF Neighbor Table
The following fields are displayed:
Parameter
Description
IP Address
This is the IP address of the OSPF neighbor router.
Neighbor Router
ID
The OSPF router ID for the remote router.
This IP address uniquely identifies
the remote area’s Area Border Router.
Option
This displays which operating option this router is using.
Priority
This is a measure of the relative priority of this route.q
State
This indicates the current state of this route.
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D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch
176
Events
This logs changes in the state of this route.
OSPF Virtual Neighbor
This table can be found in the
OSPF Monitoring
folder by clicking on the
OSPF Virtual
Neighbor
link. This table displays a list of Virtual OSPF neighbors of the switch. The user
may choose specifically search a virtual neighbor by using one of the two search options at
the top of the screen, which are:
Figure 6- 32. OSPF Virtual Neighbor window
The following fields are displayed:
Parameter
Description
Transit Area ID
Allows the entry of an OSPF Area ID
previously defined on the switch
that
allows a remote area to communicate with the backbone (area 0).
A Transit
Area cannot be a Stub Area or a Backbone Area.
Virtual Neighbor
ID
The OSPF router ID for the remote router.
This IP address uniquely identifies
the remote area’s Area Border Router.
IP Address
This is the IP address of the router.
Virtual Neighbor
Option
This displays which operating option this router is using.
Virtual Neighbor
State
This displays the current state of the route.
State Changes
This logs changes in the state of this route.
DVMRP Monitoring
This menu allows the
DVMRP
(Distance-Vector Multicast Routing Protocol) to be monitored
for each IP interface defined on the switch. This folder, found in the
Monitoring
folder, offers
3 screens for monitoring;
DVMRP Routing Table
,
DVMRP Neighbor Address Table
and
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D-Link DES-6500 Layer 3 Stackable Gigabit Ethernet Switch
177
DVMRP Routing Next Hop Table.
Information on DVMRP and its features in relation to
the DES-6500 can be found in Section 4, under
IP Multicasting
.
DVMRP Routing Table
Multicast routing information is gathered and stored by DVMRP in the DVMRP Routing
Table, which may be found in the Monitoring folder under DVMRP Monitoring, contains one
row for each route (source subnet) entry. Each routing entry contains multicast routing
information used by DVMRP in place of the unicast routing information. You may define
your search by entering a
Source IP Address
and its subnet mask into the fields at the top of
the page.
Figure 6- 33. DVMRP Routing Table
The following fields are displayed:
Parameter
Description
Source IP Address
This is the IP address of the multicast packets.
Source Mask
This is the subnet mask corresponding to the IP address above.
Upstream
Neighbor
This is the IP address of any router that is between the currently displayed
router and the source of the multicast packets.
Metric
This is a measure of the relative “cost” of this route.
Learned
This indicates how the switch discovered this route.
Interface Name
This is the name of the IP interface on which the DVMRP router resides.
Expire
This is the amount of time the route will be considered valid without being
renewed.
DVMRP Neighbor Address Table
This table, found in the
Monitoring
menu under
DVMRP Monitoring
contains information
about DVMRP neighbors of the Switch and is a read only screen.

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