Configuring Bgp Route Aggregation - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing

8.8 Configuring BGP Route Aggregation

Configuring BGP Route Aggregation on a device can reduce the sizes of routing tables on the
peers of the device.
Applicable Environment
The BGP routing table of a device on a medium or large BGP network contains a large number
of routing entries. Storing the routing table consumes a large number of memory resources, and
transmitting and processing routing information consume lots of network resources. Configuring
route aggregation can reduce the size of a routing table, prevent specific routes from being
advertised, and minimize the impact of route flapping on network performance. BGP route
aggregation and routing policies enable BGP to effectively transmit and control routes.
BGP supports automatic and manual aggregation. Manual aggregation takes precedence over
automatic aggregation. When using manual aggregation, you can apply various routing policies
and set route attributes.
Pre-configuration Tasks
Before configuring BGP route aggregation, complete the following task:
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Procedure
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Issue 02 (2014-09-30)
Configuring Basic BGP Functions
Configure automatic route aggregation.
1. Run:
system-view
The system view is displayed.
2. Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
3. Run:
ipv4-family unicast
The IPv4 unicast address family view is displayed.
4. Run:
summary automatic
Automatic aggregation is configured for imported routes.
The summary automatic command aggregates routes imported by BGP. The routes
can be direct routes, static routes, RIP routes, OSPF routes, or IS-IS routes. After this
command is run, BGP aggregates routes based on natural network segments. The
command, however, cannot aggregate routes imported using the network command.
Configure manual route aggregation.
1. Run:
system-view
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