BGP4+ Configuration

Overview of BGP4+

BGP4+ controls route advertisement and selects optimal routes.

Configuration Precautions for BGP4+

Configuring Basic BGP4+ Functions

Basic BGP4+ functions must be configured before you configure subsequent BGP4 functions on a BGP4+ network.

Configuring a BGP4+ Peer Group

Configuring a BGP4+ peer group simplifies the management of routing policies and improves route advertisement efficiency.

Controlling Route Import

BGP4+ can import the routes discovered by other protocols into the BGP4+ routing table. When importing IGP routes, BGP can filter routes by routing protocol.

Controlling Route Advertisement

BGP4+ can filter or apply routing policies to the routes to be advertised to a peer or peer group.

Controlling BGP4+ Route Selection

The policy on BGP4+ route selection can be changed by configuring BGP4+ route attributes.

Configuring BGP4+ Routing Policies

BGP4+ routing policies can be configured to flexibly control the sending and receiving of routes.

Configuring BGP4+ XPL

BGP4+ extended routing-policy language (XPL) route-filters can be used to flexibly control BGP4+ acceptance and advertisement.

Configuring BGP4+ Route Recursion to the Default Route

In case the next hops of BGP4+ routes are not directly reachable, you can configure BGP4+ route recursion to the default route.

Configuring BGP to Generate Locator Routes

Configuring BGP to generate locator routes allows different services distinguished through locators to be forwarded over different networks.

Configuring BGP4+ Load Balancing

Configuring BGP4+ load balancing better utilizes network resources.

Configuring BGP4+ to Generate a Summary Default Route

You can configure BGP4+ to generate a summary default route and then determine whether to advertise the default route to a peer by using a route-policy.

Configuring BGP4+ Connection Parameters

By configuring BGP4+ connection parameters, you can optimize BGP4+ network performance.

Configuring BGP4+ RRs

BGP4+ RRs avoid fully meshed connections between multiple IBGP peers, which reduces network costs.

Configuring a BGP4+ Confederation

On a large BGP4+ network, configuring a BGP4+ confederation reduces the number of IBGP connections and simplifies routing policy management, which increases the route advertisement efficiency.

Configuring BGP4+ Community Attributes

The community attribute is used to simplify route-policy management.

Configuring BFD for BGP4+

BFD for BGP4+ provides BGP4+ with a fast fault detection mechanism, which speeds up network convergence.

Configuring BGP4+ Auto FRR

As a protection measure against link faults, BGP4+ Auto Fast Reroute (FRR) is applicable to the network topology with primary and backup links. BGP4+ Auto FRR is applicable to services that are very sensitive to packet loss and delays.

Setting a Specified Peer or Each Peer in a Peer Group as an Independent Update Peer-Group

Setting a specified peer or each peer in a peer group as an independent update peer-group prevents routes learned from the peer from being sent back to the peer.

Configuring the Route Server Function

This section describes how to configure the route server function. The function reduces network resource consumption on ASBRs.

Configuring BGP-LS (IPv6)

BGP-LS (IPv6) provides a simple and efficient method of collecting topology information.

Configuring the BGP4+ GR Helper

A BGP4+ GR helper helps its neighbor complete BGP4+ GR.

Enabling GR for BGP4+ Peers

After graceful restart (GR) is enabled for BGP4+ peers specified on a BGP4+ speaker, the BGP4+ speaker can negotiate the GR capability with these peers and establish BGP4+ connections with them if negotiation succeeds.

Configuring BGP4+ Route Dampening

Configuring BGP4+ route dampening suppresses instable BGP4+ routes.

Configuring Suppression on BGP4+ Peer Flapping

Suppression on BGP4+ peer flapping allows a device to delay the establishment of a BGP4+ peer relationship that flaps continuously.

Configuring BGP4+ Recursion Suppression in Case of Next Hop Flapping

BGP4+ recursion suppression in case of next hop flapping prevents the system from frequently processing changes of a large number of routes that recurse to a flapping next hop, which reduces system resource consumption and CPU usage.

Configuring BMP

The BGP Monitoring Protocol (BMP) monitors BGP4+ running status of devices in real time, such as the establishment and termination status of BGP4+ peer relationships and route update status.

Configuring BGP4+ Security

To improve BGP4+ network security, you can configure BGP4+ authentication and GTSM on the BGP network.

Configuring BGP4+ 6PE

BGP4+ 6PE enables separated IPv6 networks to communicate using the MPLS tunneling technology.

Enabling the Device to Recurse BGP IPv6 Unicast Routes to Tunnels

By default, BGP IPv6 unicast routes can recurse to outbound interfaces and next hops, but not to tunnels. A device can be enabled to recurse BGP IPv6 unicast routes to tunnels.

Maintaining BGP4+

Maintaining BGP4+ involves resetting BGP4+ connections, clearing BGP4+ statistics, and debugging BGP4+.

Configuration Examples for BGP4+

This chapter provides several BGP4+ configuration examples.