Avaya Configuring ATM and MPLS Services Instrukcja Użytkownika Strona 508
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Configuring ATM and MPLS Services
C-2
117374-C Rev 00
NHRP Overview
NHRP is a second-generation address resolution protocol that is described in
IETF <draft-ietf-rolc-nhrp-15.txt>. As defined by the IETF draft, NHRP provides
address resolution services by mapping “internetworking layer addresses and
NBMA subnetwork addresses.” As implemented by Bay Networks, NHRP
resolves IP and ATM addresses.
The IETF draft specifies behavior for NHRP clients and NHRP servers.
• The NHRP client (NHC) generates NHRP address resolution requests for the
local MPS.
• The NHRP server (NHS) responds to NHRP address resolution requests by
generating NHRP address resolution replies. For this purpose, the NHS
maintains an address translation cache and a next-hop cache.
NHRP Message Exchange
NHRP address resolution is supported by seven formatted NHRP messages.
• NHRP resolution request
An NHRP resolution request is generated by an NHC and routed through the
ATM topology. It is functionally equivalent to a standard ARP request in that
it contains the layer 3 and layer 2 address of the originator, the layer 3 address
of the target destination, and a blank field reserved for the layer 2 address of
the target. As implemented by Bay Networks, the NHRP resolution request
contains the IP and ATM addresses of the originator and the IP address of the
target.
• NHRP resolution reply
An NHRP resolution reply is generated by an NHS in response to an NHRP
resolution request. Like an NHRP resolution request, it is routed through the
ATM topology. It is functionally equivalent to a standard ARP response in that
it replicates the information in the NHRP resolution request and supplies the
requested layer 2 (ATM) address.
• NHRP registration request
An NHRP registration request is generated by an NHC and directed toward
the local NHS. The NHRP registration request is used to register address
mapping data gathered by the NHC with the NHS. The NHS places mapping
data in its address translation cache.
- Configuring ATM 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117374-C Rev 00 10
- Before You Begin 23
- Text Conventions 24
- Acronyms 26
- How to Get Help 30
- Chapter 1 31
- Understanding ATM, MPOA 31
- ATM General Information 32
- Figure 1-2. ATM Cell Header 33
- Data Transmission 34
- VP = Virtual path 35
- VC = Virtual channel 35
- ATM Layers 36
- ATM0005A 39
- Data Encapsulation Methods 42
- Encapsulation Rules for PVCs 46
- PVC Access Methods 47
- SVC Access Methods 52
- Assigning ATM Addresses 52
- ATM Traffic Parameters 53
- ARP and Inverse ARP Support 57
- ATM Error Checking 57
- Converting Mb/s to Cells/s 57
- ATM Address Resolution 61
- ATM LAN Emulation Concepts 63
- LAN Emulation Components 64
- Redundant LES/BUS 65
- LAN Emulation States 66
- MPOA Logical Components 69
- MPOA Basic Elements 70
- Figure 1-15 73
- OAM Loopback 75
- OAM Alarms 75
- For More Information 76
- Chapter 2 79
- Understanding MPLS 79
- MPLS General Information 80
- MPLS System Overview 81
- Label Distribution Entity 82
- MPLS Label Management 82
- Forwarding 82
- The MPLS Network 83
- Label Switching Router 84
- Label Edge Router 84
- Supported Protocols 85
- Chapter 3 87
- Using the Bay Command Console 88
- Site Manager 88
- Defining PVC Service 90
- Defining Classical IP Service 90
- Defining LEC Service 91
- <vpi_number> 92
- <vci_number> 92
- Adding IP 93
- Adding IPX 93
- Adding PVCs 100
- Starting the MPOA Server 101
- Configuring IP 102
- Services 102
- Mapping an MPS to a LEC 105
- (continued) 106
- (continued) 107
- Configuring the MPS 108
- Redundancy 110
- Configuring 111
- Deleting ATM from the Router 115
- Starting MPLS 116
- Configuring IP Services 125
- Where to Go Next 126
- Chapter 4 127
- Customizing an ATM Interface 127
- Using the BCC 128
- Using Site Manager 129
- <integer> 147
- Chapter 5 149
- Customizing Signaling 149
- Defining Signaling 150
- Pacing Calls 173
- Table 5-2. Valid PCR Ranges 189
- Defining SSCOP/Signaling AAL 205
- Chapter 6 217
- Customizing PVC Service 217
- Records and PVCs 217
- Chapter 7 243
- Specifying an Owner 270
- Chapter 9 307
- Setting the Give Up Time 321
- Deleting an Individual MPS 325
- Chapter 10 329
- Chapter 11 333
- Customizing LDP Parameters 334
- Changing the Local IP Address 335
- Specifying a Local TCP Port 336
- Specifying a Remote TCP Port 338
- Specifying a Hold Time 340
- Setting the Receive SDU Size 358
- Accessing ATM Parameters 368
- Using the Menu Path 370
- ATM Line Parameters 372
- Site Manager Parameters 373
- ATM Interface Parameters 378
- ATM Service Record Parameters 381
- LAN Emulation Parameters 393
- LES Parameters 403
- ATM Signaling Parameters 405
- Caution: 409
- ATM ILMI Signaling Parameters 421
- ATM Signaling AAL Parameters 429
- MPOA Parameters 433
- OAM Parameters 442
- MPLS Parameters 445
- MLM Parameter 449
- Static Route Parameters 449
- Default VC Parameters 450
- NHRP Parameters 460
- ATMARP Parameters 468
- Adjacent Host Parameters 470
- <slot> 474
- <connector> 474
- <servicename> 479
- <ip_address> 481
- show dsx3 circuits 483
- show dsx3 current 484
- show dsx3 history 487
- show sonet circuits 498
- show sonet current 499
- show sonet history 502
- Appendix C 507
- NHRP Overview 508
- Editing an NHRP Record 514
- Disabling an NHRP Record 515
- Deleting NHRP 515
- Index-10 526
- Index-11 527
- Index-12 528
- Index-13 529
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