Huawei Quidway S3900 Series User Manual

Operation Manual – Routing Protocol
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 6 Route Capacity Configuration
Huawei Technologies Proprietary
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Chapter 6 Route Capacity Configuration
6.1 Route Capacity Configuration Overview
6.1.1 Introduction
In practical networking applications, there are a large number of routes, especially
OSPF routes, in the routing table. Normally, routing information is stored in the
memory of the switch. While the size of the routing table increases, the total memory
of the switch remains unchanged unless the hardware is upgraded. However,
upgrading may not always solve the problem.
To solve this problem, the S3900 series provide a mechanism to control the size of the
routing table; that is, monitoring the free memory in the system to determine whether
to add new routes to the routing table and whether to keep the connection of a routing
protocol.
Caution:
Note that, normally, the default system configuration meets the requirements. To
avoid decreasing system stability and availability due to improper configuration, it is
not recommended to modify the configuration yourself.
6.1.2 Route Capacity Limitation on the S3900 Series
Huge routing tables are usually caused by OSPF routes. Therefore, the route capacity
limitation implemented by a S3900 switch applies to OSPF routes only but not to static
and RIP routes.
When the free memory of the switch is less than the lower limit, the system tears down
the OSPF connection and removes the corresponding routes from the routing table so
that the memory occupied is released. The system checks the free memory
periodically. When the system finds that the free memory size restores to a safety
value, the system recovers the OSPF connection.
6.2 Route Capacity Configuration
Route capacity configuration includes:

Huawei Quidway S3900 Series Specifications

General

Brand	Huawei
Model	Quidway S3900 Series
Category	Switch
Language	English