es.tid.rsvp.objects.gmpls

Class GeneralizedLabelRequest

java.lang.Object

es.tid.rsvp.objects.RSVPObject

es.tid.rsvp.objects.LabelRequest

es.tid.rsvp.objects.gmpls.GeneralizedLabelRequest

All Implemented Interfaces:

RSVPElement

public class GeneralizedLabelRequest
extends LabelRequest

Author:

Fernando Munoz del Nuevo RFC 3473 2.1. Generalized Label Request Object A Path message SHOULD contain as specific an LSP (Label Switched Path) Encoding Type as possible to allow the maximum flexibility in switching by transit LSRs. A Generalized Label Request object is set by the ingress node, transparently passed by transit nodes, and used by the egress node. The Switching Type field may also be updated hop-by-hop. The format of a Generalized Label Request object is: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Length | Class-Num (19)| C-Type (4) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | LSP Enc. Type |Switching Type | G-PID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ See [RFC3471] for a description of parameters. RFC 3471 3. Label Related Formats To deal with the widening scope of MPLS into the optical and time domain, several new forms of "label" are required. These new forms of label are collectively referred to as a "generalized label". A generalized label contains enough information to allow the receiving node to program its cross connect, regardless of the type of this cross connect, such that the ingress segments of the path are properly joined. This section defines a generalized label request, a generalized label, support for waveband switching, suggested label and label sets. Note that since the nodes sending and receiving the new form of label know what kinds of link they are using, the generalized label does not contain a type field, instead the nodes are expected to know from context what type of label to expect. 3.1. Generalized Label Request The Generalized Label Request supports communication of characteristics required to support the LSP being requested. These characteristics include LSP encoding and LSP payload. Note that these characteristics may be used by transit nodes, e.g., to support penultimate hop popping. The Generalized Label Request carries an LSP encoding parameter, called LSP Encoding Type. This parameter indicates the encoding type, e.g., SONET/SDH/GigE etc., that will be used with the data associated with the LSP. The LSP Encoding Type represents the nature of the LSP, and not the nature of the links that the LSP traverses. A link may support a set of encoding formats, where support means that a link is able to carry and switch a signal of one or more of these encoding formats depending on the resource availability and capacity of the link. For example, consider an LSP signaled with "lambda" encoding. It is expected that such an LSP would be supported with no electrical conversion and no knowledge of the modulation and speed by the transit nodes. Other formats normally require framing knowledge, and field parameters are broken into the framing type and speed as shown below. The Generalized Label Request also indicates the type of switching that is being requested on a link. This field normally is consistent across all links of an LSP. 3.1.1. Required Information The information carried in a Generalized Label Request is: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | LSP Enc. Type |Switching Type | G-PID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ LSP Encoding Type: 8 bits Indicates the encoding of the LSP being requested. The following shows permitted values and their meaning: Value Type ----- ---- 1 Packet 2 Ethernet 3 ANSI/ETSI PDH 4 Reserved 5 SDH ITU-T G.707 / SONET ANSI T1.105 6 Reserved 7 Digital Wrapper 8 Lambda (photonic) 9 Fiber 10 Reserved 11 FiberChannel // 12 Spectrum The ANSI PDH and ETSI PDH types designate these respective networking technologies. DS1 and DS3 are examples of ANSI PDH LSPs. An E1 LSP would be ETSI PDH. The Lambda encoding type refers to an LSP that encompasses a whole wavelengths. The Fiber encoding type refers to an LSP that encompasses a whole fiber port. Switching Type: 8 bits Indicates the type of switching that should be performed on a particular link. This field is needed for links that advertise more than one type of switching capability. This field should map to one of the values advertised for the corresponding link in the routing Switching Capability Descriptor, see [GMPLS- RTG]. The following are currently defined values: Value Type ----- ---- 1 Packet-Switch Capable-1 (PSC-1) 2 Packet-Switch Capable-2 (PSC-2) 3 Packet-Switch Capable-3 (PSC-3) 4 Packet-Switch Capable-4 (PSC-4) 51 Layer-2 Switch Capable (L2SC) 100 Time-Division-Multiplex Capable (TDM) 150 Lambda-Switch Capable (LSC) 200 Fiber-Switch Capable (FSC) Generalized PID (G-PID): 16 bits An identifier of the payload carried by an LSP, i.e., an identifier of the client layer of that LSP. This is used by the nodes at the endpoints of the LSP, and in some cases by the penultimate hop. Standard Ethertype values are used for packet and Ethernet LSPs; other values are: Value Type Technology ----- ---- ---------- 0 Unknown All 1 Reserved 2 Reserved 3 Reserved 4 Reserved 5 Asynchronous mapping of E4 SDH 6 Asynchronous mapping of DS3/T3 SDH 7 Asynchronous mapping of E3 SDH 8 Bit synchronous mapping of E3 SDH 9 Byte synchronous mapping of E3 SDH 10 Asynchronous mapping of DS2/T2 SDH 11 Bit synchronous mapping of DS2/T2 SDH 12 Reserved 13 Asynchronous mapping of E1 SDH 14 Byte synchronous mapping of E1 SDH 15 Byte synchronous mapping of 31 * DS0 SDH 16 Asynchronous mapping of DS1/T1 SDH 17 Bit synchronous mapping of DS1/T1 SDH 18 Byte synchronous mapping of DS1/T1 SDH 19 VC-11 in VC-12 SDH 20 Reserved 21 Reserved 22 DS1 SF Asynchronous SONET 23 DS1 ESF Asynchronous SONET 24 DS3 M23 Asynchronous SONET 25 DS3 C-Bit Parity Asynchronous SONET 26 VT/LOVC SDH 27 STS SPE/HOVC SDH 28 POS - No Scrambling, 16 bit CRC SDH 29 POS - No Scrambling, 32 bit CRC SDH 30 POS - Scrambling, 16 bit CRC SDH 31 POS - Scrambling, 32 bit CRC SDH 32 ATM mapping SDH 33 Ethernet SDH, Lambda, Fiber 34 SONET/SDH Lambda, Fiber 35 Reserved (SONET deprecated) Lambda, Fiber 36 Digital Wrapper Lambda, Fiber 37 Lambda Fiber 38 ANSI/ETSI PDH SDH 39 Reserved SDH 40 Link Access Protocol SDH SDH (LAPS - X.85 and X.86) 41 FDDI SDH, Lambda, Fiber 42 DQDB (ETSI ETS 300 216) SDH 43 FiberChannel-3 (Services) FiberChannel 44 HDLC SDH 45 Ethernet V2/DIX (only) SDH, Lambda, Fiber 46 Ethernet 802.3 (only) SDH, Lambda, Fiber

Field Summary

Fields inherited from class es.tid.rsvp.objects.LabelRequest

l3PID, reserved

Fields inherited from class es.tid.rsvp.objects.RSVPObject

bytes, classNum, cType, length

Constructor Summary

Constructors

Constructor and Description
GeneralizedLabelRequest(byte[] bytes, int offset) Constructor to be used when a new Label Request With ATM Label Range Object wanted to be decoded from a received message.
GeneralizedLabelRequest(int lspEncodingType, int switchingType, int gpid)

Method Summary

Modifier and Type	Method and Description
void	decode(byte[] bytes, int offset)
void	encode() Generic method to encode an RSVP element

Methods inherited from class es.tid.rsvp.objects.LabelRequest

getL3PID, getReserved, setL3PID, setReserved

Methods inherited from class es.tid.rsvp.objects.RSVPObject

decodeHeader, encodeHeader, getBytes, getClassNum, getClassNum, getcType, getcType, getLength, getLength, setBytes, setClassNum, setcType, setLength

Methods inherited from class java.lang.Object

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

Constructor Detail

GeneralizedLabelRequest

public GeneralizedLabelRequest(int lspEncodingType,
                               int switchingType,
                               int gpid)

GeneralizedLabelRequest

public GeneralizedLabelRequest(byte[] bytes,
                               int offset)

Constructor to be used when a new Label Request With ATM Label Range Object wanted to be decoded from a received message.

Parameters:

bytes -

offset -

Method Detail

encode

public void encode()
            throws RSVPProtocolViolationException

Description copied from interface: RSVPElement

Generic method to encode an RSVP element

Specified by:

encode in interface RSVPElement

Overrides:

encode in class LabelRequest

Throws:

RSVPProtocolViolationException

decode

public void decode(byte[] bytes,
                   int offset)
            throws RSVPProtocolViolationException

Overrides:

decode in class LabelRequest

Throws:

RSVPProtocolViolationException