Enterasys X-Pedition XSR CLI Cli Reference Manual page 166

OSPF Commands
auto-virtual-link
This command automatically creates virtual links. Refer to the
more related information.
Syntax
auto-virtual-link
Syntax
This command's no form negates the automatic creation of a virtual link:
no auto-virtual-link
Mode
OSPF Router configuration:
Example
XSR(config-router)#auto-virtual-link
database-overflow
This command dynamically limits the size of OSPF Link‐State database overflow, a condition
where the XSR is unable to maintain the database in its entirety. Typically, database overflow
occurs when a router imports a large number of external, Type 5 LSA routes into OSPF. This
command lets you control other LSA types as well: 1‐4, 7, and 10.
Usually, this problem can be averted by proper configuration of OSPF routers into stub areas or
NSSAs, since AS‐external LSAs are omitted from this type of Link‐State databases. But, in the
event of an unexpected database overflow, there is insufficient time to perform this type of
isolation.
Syntax
database-overflow [LSA type][option]
LSA Type:
asbr-summary
external
5-90 Configuring the Internet Protocol
Figure 5-1
Area 0.0.0.0
ABR1
Eth 1
172.16.150.1
XSR(config-router)#
AS Border Router Summary LSA (Type 4).
AS External Area LSA (Type 5).
Area Virtual Link Example
Area 2
virtual link
Serial 1/1
Serial 1/0
192.16.33.1 192.16.33.2
Area 3
ABR2
Eth 1
172.15.0.1
area-virtual-link command for