3com 3031 Instruccion De Instalación
44
R
OUTE
C
APACITY
C
ONFIGURATION
Route Capacity
Configuration
Overview
Configuration
Overview
In practical networking applications, there are always a large number of routes in
the routing table especially OSPF routes and BGP routes. The routing information
is usually stored in the memory of the router. When the size of the routing table
increases, the memory used also increases, but the total memory of the router will
not change (unless the hardware is upgraded but upgrade cannot be guaranteed
to solve all problems). When the memory is exhausted, the router will not work.
the routing table especially OSPF routes and BGP routes. The routing information
is usually stored in the memory of the router. When the size of the routing table
increases, the memory used also increases, but the total memory of the router will
not change (unless the hardware is upgraded but upgrade cannot be guaranteed
to solve all problems). When the memory is exhausted, the router will not work.
In order to solve such problem, the router provides a mechanism to control the
size of the routing table: Monitor the free memory in the system to determine
whether to add new routes to the routing table and whether to keep connection
with a routing protocol.
size of the routing table: Monitor the free memory in the system to determine
whether to add new routes to the routing table and whether to keep connection
with a routing protocol.
It should be noted that the default value meets the requirements normally. The
user is not recommended to modify the configuration to avoid improper
configuration to avoid reducing of stability and availability of the system.
user is not recommended to modify the configuration to avoid improper
configuration to avoid reducing of stability and availability of the system.
Route Capacity
Limitation
Usually, the huge size of the routing table is caused by BGP routes and OSPF
routes. Therefore, the route capacity limitation is only effective to these two types
of routes and has no impact on static routes and other dynamic routing protocols.
routes. Therefore, the route capacity limitation is only effective to these two types
of routes and has no impact on static routes and other dynamic routing protocols.
When the free memory of a router reduces to the lower limit value, the system will
disconnect BGP and OSPF and remove corresponding routes from the routing
table so that the memory occupied is released. The system checks the free memory
periodically. When the free memory is detected to restore to the safety value, BGP
and OSPF connection will be restored.
disconnect BGP and OSPF and remove corresponding routes from the routing
table so that the memory occupied is released. The system checks the free memory
periodically. When the free memory is detected to restore to the safety value, BGP
and OSPF connection will be restored.
Route Capacity
Configuration
Configuration
Route capacity configuration includes:
■
Configure the lower limit of the router memory
■
Configure the safety value of the router memory
■
Configure the lower limit and the safety value simultaneously
■
Restore the lower limit and the safety value of the router memory to the
default value
default value
■
Disable automatic recovery of the disconnected routing protocol
■
Enable automatic recovery of the disconnected routing protocol
Configuring the Lower
Limit of the Router
Memory
When the router memory is equal to or lower than the lower limit, BGP and OSPF
will be disconnected.
will be disconnected.
Perform the following configuration in System View.