User guide

Configuring OSPF
Summit24e3 Switch Installation and User Guide 197
Configuring OSPF
Each switch that is configured to run OSPF must have a unique router ID. It is recommended that you
manually set the router ID of the switches participating in OSPF, instead of having the switch
automatically choose its router ID based on the highest interface IP address. Not performing this
configuration in larger, dynamic environments could result in an older link state database remaining in
use.
Table 59 describes the commands used to configure OSPF.
Table 59: OSPF Configuration Commands
Command Description
config ospf add vlan <name> area <areaid>
link-type [auto | broadcast | point-to-point]
{passive}
Configures the OSPF link type. Specify one of
the following:
• auto—ExtremeWare automatically
determins the OSPF link type based on the
interface type.
• broadcast—Broadcast link, such as
Ethernet. Routers must elect a DR and a
BDR during synchronization.
• point-to-point—Point-to-point link type,
such as PPP.
The default setting is auto.
The passive parameter indicates that the
interface does not send or receive OSPF
packets.
config ospf vlan <name> neighbor add
<ipaddress>
Configures the IP address of a point-to-point
neighbor.
config ospf vlan <name> neighbor delete
<ipaddress>
Deletes the IP address of a point-to-point
neighbor.
config ospf [area <areaid> | vlan [<name> | all]]
cost [automatic | <number>]
Configures the cost metric of one or all
VLAN(s). If an area is specified, the cost metric
is applied to all VLANs currently within that
area. When automatic is specified, the
advertised cost is determined from the OSPF
metric table and corresponds to the active
highest bandwidth port in the VLAN.
config ospf [vlan <name> | area <areaid> |
virtual-link <routerid> <areaid>] authentication
[simple-password <password> | md5
<md5_key_id> <md5_key>| none | encrypted
[simple-password <password> | md5
<md5_key_id> <md5_key>]
Specifies the authentication password (up to
eight characters) or Message Digest 5 (MD5)
key for one or all interfaces (VLANs) in an
area. The md5_key is a numeric value with the
range 0 to 65,536. When the OSPF area is
specified, authentication information is applied
to all OSPF interfaces within the area.