3Com SuperStack 4 Configuration Manual page 151

Limiting Route Capacity
Route Capacity
Configuration
The size of the routing table is determined by OSPF routes. Therefore, the route
capacity limitation of the Switch 5500G-EI is only effective for these two types of
routes and has no impact on static routes and other dynamic routing protocols.
When the free memory of the Switch 5500G-EI reduces to the lower limit value,
the system will disconnect OSPF and remove the routes from the routing table to
release memory. The system checks the free memory periodically. When enough
free memory is detected the OSPF connection is restored.
Route capacity configuration includes tasks described in the following sections:
Setting the Lower Limit and the Safety Value of the Switch Memory
■
Enabling and Disabling Automatic Recovery of Disconnected Routing Protocols
■
Setting the Lower Limit and the Safety Value of the Switch Memory
When the Switch memory is equal to or lower than the lower limit, OSPF is
disconnected and OSPF routes are removed from the routing table.
Perform the following configuration in the System View.
Table 171 Setting the Lower Limit and the Safety Value of the Switch Memory
Operation
Set the lower limit and the safety value of the
Switch
Restore the lower limit and the safety value
of the Switch to the default value
The lower limit value set for the memory must be smaller than the safety value.
Enabling and Disabling Automatic Recovery of Disconnected Routing
Protocols
If the Automatic Recovery function of the Switch 5500G-EI is disabled, connection
to routing protocols is not restored even if the free memory returns to the safety
value. Therefore, disabling automatic recovery must be performed cautiously.
Perform the following configurations in System View.
Table 172 Enabling/Disablingthe Switch to Recover the Disconnected Routing Protocol
Automatically
Operation
Enable memory automatic restoration function
Disable memory automatic restoration function of
a Ethernet switch
By default, automatic recovery of disconnected routing protocols is enabled.
Route Capacity Configuration
Command
memory { safety safety_value |
limit limit_value }*
undo memory [ safety | limit ]
Command
memory auto-establish enable
memory auto-establish disable
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