es.tid.bgp.bgp4.update.fields

Class NLRI

java.lang.Object

es.tid.bgp.bgp4.objects.BGP4Object

es.tid.bgp.bgp4.update.fields.NLRI

All Implemented Interfaces:

BGP4Element

Direct Known Subclasses:

LinkStateNLRI

public abstract class NLRI
extends BGP4Object

Network Layer Reachability Information: This variable length field contains a list of IP address prefixes. The length, in octets, of the Network Layer Reachability Information is not encoded explicitly, but can be calculated as: UPDATE message Length - 23 - Total Path Attributes Length - Withdrawn Routes Length where UPDATE message Length is the value encoded in the fixed- size BGP header, Total Path Attribute Length, and Withdrawn Routes Length are the values encoded in the variable part of the UPDATE message, and 23 is a combined length of the fixed- size BGP header, the Total Path Attribute Length field, and the Withdrawn Routes Length field. Reachability information is encoded as one or more 2-tuples of the form , whose fields are described below:

                  +---------------------------+
                  |   Length (1 octet)        |
                  +---------------------------+
                  |   Prefix (variable)       |
                  +---------------------------+
 

The use and the meaning of these fields are as follows: a) Length: The Length field indicates the length in bits of the IP address prefix. A length of zero indicates a prefix that matches all IP addresses (with prefix, itself, of zero octets). b) Prefix: The Prefix field contains an IP address prefix, followed by enough trailing bits to make the end of the field fall on an octet boundary. Note that the value of the trailing bits is irrelevant.

Author:

mcs

Field Summary

Fields inherited from class es.tid.bgp.bgp4.objects.BGP4Object

bytes, length, log

Constructor Summary

Constructors

Constructor and Description
NLRI()

Method Summary

Methods inherited from class es.tid.bgp.bgp4.objects.BGP4Object

equals, getBytes, getLength, hashCode, setBytes, setLength

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface es.tid.bgp.bgp4.BGP4Element

encode

Constructor Detail

NLRI

public NLRI()