Bgp4+ Configuration; Bgp4+ Overview - Zte ZXR10 5900E Series User Manual

All gigabit-port intelligent routing switch

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BGP4+ Configuration

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Configuring BGP4+ ............................................................52

BGP4+ Configuration Example.............................................59

BGP4+ Maintenance and Diagnosis ......................................60

BGP4+ Overview

BGP4 multi-protocol extension, namely BGP4+, is specified to en-

able the BGP4 to support multiple network layer protocols such as

IPv6 and IPX.

To make BGP4 protocol support multiple network layer protocols

to select routes, the following functions must be added to it:

�

The information newly added to BGP4 must make a specific

network layer protocol associated with the next hop informa-

tion. That is, the address of the next hop should be indicated

by a designated network layer protocol address.

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BGP4 protocol should be able to enable a specific protocol asso-

ciated with the NLRI, and employ address family to distinguish

various network layer protocols.

BGP4+ defined two attributes MP_REACH_NLRI and MP_UN-

REACH_NLRI BGP. They are used to transmit IPv6 routing

information. Similar to common distance vector routing protocols,

BGP4 protocol is usually independent of specific address family

used by the protocol.

IPv6 protocol is supported by BGP4. IPv6 introduces area-based

unicast addresses and defines the specific situations where specific

address ranges must be applied. That is the fundamental differ-

ence between IPv6 and IPv4 protocols in route information.

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