Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring Advanced Routing Information (Rev. 03)
Open Shortest Path First (OSPF)
© 2008 Foundry Networks, Inc
Page 18 of 68
standard
Standard behavior (RFC 2328
OSPF Version 2
). This is the default ABR
behavior.
Setting a Limit to the Number of LSAs
The
overflow number lsa external
command, in Router OSPF Configuration mode, sets the upper
limit to the number of LSAs allowed in the router Link-State Database (LSDB). The
no
form of
this command resets the default (up to 10000 LSAs).
If the limit is exceeded, the router stops transmitting LSAs, until conditions allow transmission to
be resumed.
Command Syntax
device-name
(config-router)#
overflow number lsa external
<
max-number
>
device-name
(config-router)#
no overflow number lsa external
Argument Description
max-number
Maximum number of non-default AS-external LSAs in the database, in the
range <1-10000>.
Suppressing the Routing Updates on a Specified IP Interface
The
passive-interface
command, in Router OSPF Configuration mode, suppresses routing updates
on the specified IP interface. The
no
form of this command re-enables sending routing updates.
To prevent other routers on a local network from learning about routes dynamically, the user can
keep routing update messages from being sent through a router IP interface. This feature is also
applies to RIP routing protocol.
In OSPF, the IP interface address the user specifies as passive appears as a stub network in the
OSPF domain. OSPF routing information is neither sent nor received through the specified router
IP interface.
Command Syntax
device-name
(config-router)#
passive-interface IFNAME
device-name
(config-router)#
no passive-interface IFNAME
Argument Description
IFNAME
Name of suppressed IP interface (
swN
).
Example
The following example sends OSPF updates to all IP interfaces on network 131.128.0.0 except for
IP interface sw5:
device-name
(config)#
router ospf
device-name
(config-router)#
network 131.128.0.0/16 area 0
device-name
(config-router)#
passive-interface sw5