3Com 10014298 manual Configuring Route Capacity, Setting the Lower Limit for Switch Memory

Route Capacity 105

routing information not satisfying the requirement, but if all the items are in the deny mode, no routes will pass the ip-prefix filtering. You can define an item of permit 0.0.0.0/0 less-equal 32 after the multiple list items in the deny mode, so as to let all the other routes pass the filtering (If less-equal 32 is not specified, only the default route will be matched).

Route Capacity

Configuring Route

Capacity

In practical networking applications, there is always a large number of routes in the routing table. The routing information is usually stored in the memory of the Ethernet switch. When the size of the routing table increases, it can consume a significant amount of switch’s memory.

The Switch 7750 provides a mechanism to control the size of the routing table. It monitors the free memory in the system to determine whether to add new routes to the routing table, and whether or not to keep connection with a routing protocol.

The default value normally meets the network requirements. You should be careful when modifying the configuration to avoid reducing the stability of the network.

Route capacity configuration includes tasks described in the following sections:

■Setting the Lower Limit for Switch Memory

■Setting the Safety Value for Switch Memory

■Setting the Lower Limit and the Safety Value Simultaneously

■Preventing Automatic Recovery of Disconnected Routing Protocols

■Enabling Automatic Recovery of Disconnected Routing Protocols

■Displaying and Debugging Route Capacity

Setting the Lower Limit for Switch Memory

When the Ethernet switch memory is equal to or lower than the lower limit, routes will be disconnected.

Perform the following configurations in system view.

Table 108 Setting the Lower Limit of the Ethernet Switch Memory

Operation	Command
Set the lower limit of the Ethernet switch	memory limit value
memory

By default, the lower limit of the Ethernet switch memory is 2Mbytes.

The lower limit value set for the memory must be smaller than the safety value.

Setting the Safety Value for Switch Memory

When the amount of free memory is reduced to the safety value but has not reached the lower limit, you can use the display memory limit command to see how much free memory remains.