Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches Chapter 7 Route Capacity Configuration
Huawei Technologies Proprietary
7-1
Chapter 7 Route Capacity Configuration
7.1 Route Capacity Configuration Overview
7.1.1 Introduction
In practical networking applications, there is 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 Ethernet switch. When the size of the routing table
increases, the total memory of the Ethernet switch will not change (unless the hardware
is upgraded but upgrading cannot be guaranteed to solve all problems).
In order to solve such problem, Quidway S3500 Series Ethernet Switches provide 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.
 Note:
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.
7.1.2 Route Capacity Limitation Implemented by S3500 Series Ethernet
Switches
Usually, the huge size of the routing table is caused by BGP routes and OSPF routes.
Therefore, the route capacity limitation of S3500 Series Ethernet Switches are 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 Ethernet switch 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.
7.2 Route Capacity Configuration
Route capacity configuration includes:
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