Loading ...
Loading ...
Loading ...
DGS-1520 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide
256
Parameter Description
become the DR, the router with the higher router priority will be elected the DR. If
the routers have the same priority, the router with the higher router ID takes
precedence. Only routers with non-zero router priority values are eligible to
become the DR or Backup Designated Router (BDR). By default, this value is 1.
Select the Default option to use the default value.
Network Type
Select the OSPF network type here. Options to choose from are:
• Broadcast - Specifies the network type as broadcast. On a broadcast
network, only the designated router and backup designated router become
adjacent neighbors of all other routers attached.
• Point-to-Point - Specifies the network type as point-to-point. On point-to-
point network, only two routers become adjacent if they can communicate.
Authentication
Select the authentication type that will be used here. Options to choose from are
None, Simple Password, and MD5.
Password After selecting the Simple Password option, enter the simple password here. This
password can be up to 8 characters long. The syntax is general string that does
not allow spaces.
This creates a password (key) that is inserted into the OSPF header when the
router originates routing protocol packets. Assign a separate password to each
network for different interfaces. Routers on the same network must use the same
password to be able to exchange OSPF routing data. Configure the routers in the
same routing domain with the same password.
MD5 Key ID After selecting the MD5 option, enter the MD5 key ID for the password here. The
range is from 1 to 255.
MD5 After selecting the MD5 option, enter the MD5 key here. This key must be 16
characters long. The syntax is an alphanumeric string that does not allow spaces.
In the MD5 mode, the OSPF message sender will compute a message digest
based on the message digest key for the TX message. The message digest and
the key ID will be encoded in the packet. The receiver of the packet will verify the
digest in the message against the digest computed based on the locally defined
message digest key corresponding to the same key ID.
The same key ID on the neighboring router should be defined with the same key
string.
All the neighboring routers on the same interface must use the same key to
exchange the OSPF packet with each other. Normally, all neighboring routers on
the interface use the same key.
With the MD5 digest mode, the user can roll over to a new key without disrupting
the current message exchange using the new key. Supposing that a router is
currently using an old key to exchange OSPF packets with the neighbor router, as
the user configures a new key, the router will start the roll over process by sending
duplicated packets for both of the old and the new key. The router will stop sending
duplicated packets until it finds that all routers on the network have learned the
new key. After the rollover process completed, the user should delete the old key
to prevent the router from communicating with the router using the old key.
Click the Apply button to accept the changes made.
OSPFv2 Redistribute Settings
This window is used to display and configure the OSPFv2 redistribution settings. External routes can be redistributed
to normal areas as Type-5 external routes and redistributed to NSSA stub areas as Type-7 external routes by the
ASBR. If the redistributed external route is of Type-1, the metric represents the internal metric. If the redistributed
external route is of Type-2, the metric represents the external metric. An internal metric will consider the cost of the
route from itself to the redistributing router plus the advertised cost to reach the destination. An external metric only
considers the advertised metric to reach the destination. If no metric value is specified by the default metric, routes
redistributed from other protocols will get a metric value of 20.
Loading ...
Loading ...
Loading ...