Cisco ASR 900 Series User manual

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji
16.7.x (Cisco ASR 900 Series)
First Published: 2017-11-17
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CONTENTS
CHAPTER 1 Configuring Pseudowire 1
Pseudowire Overview 1
Limitations 2
Circuit Emulation Overview 3
Structure-Agnostic TDM over Packet 3
Circuit Emulation Service over Packet-Switched Network 4
Asynchronous Transfer Mode over MPLS 6
Transportation of Service Using Ethernet over MPLS 7
Limitations 7
Configuring CEM 8
Configuration Guidelines and Restrictions 8
Configuring a CEM Group 8
Using CEM Classes 10
Configuring a Clear-Channel ATM Interface 12
Configuring CEM Parameters 12
Configuring Payload Size (Optional) 12
Setting the Dejitter Buffer Size 13
Setting an Idle Pattern (Optional) 13
Enabling Dummy Mode 13
Setting a Dummy Pattern 13
Shutting Down a CEM Channel 13
Configuring CAS 14
Information About CAS 14
Configuring CAS 14
Verifying CAS Configuration 16
Configuration Examples for CAS 16
Configuring ATM 17
Configuring a Clear-Channel ATM Interface 17
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Configuring ATM IMA 18
BGP PIC with TDM Configuration 21
Configuring Structure-Agnostic TDM over Packet (SAToP) 21
Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN) 23
Configuring a Clear-Channel ATM Pseudowire 24
Configuring an ATM over MPLS Pseudowire 26
Configuring the Controller 26
Configuring an IMA Interface 27
Configuring the ATM over MPLS Pseudowire Interface 29
Configuring 1-to-1 VCC Cell Transport Pseudowire 30
Mapping a Single PVC to a Pseudowire 30
Configuring N-to-1 VCC Cell Transport Pseudowire 31
Configuring 1-to-1 VPC Cell Transport 31
Configuring ATM AAL5 SDU VCC Transport 33
Configuring a Port Mode Pseudowire 35
Optional Configurations 36
Configuring an Ethernet over MPLS Pseudowire 37
Configuring Pseudowire Redundancy 39
Pseudowire Redundancy with Uni-directional Active-Active 41
Restrictions 42
Configuring Pseudowire Redundancy Active-Active—Protocol Based 43
Configuring the Working Controller for MR-APS with Pseudowire Redundancy
Active-Active 43
Configuring the Protect Controller for MR-APS with Pseudowire Redundancy
Active-Active 44
Verifying the Interface Configuration 44
Configuration Examples 45
Example: CEM Configuration 45
Example: BGP PIC with TDM Configuration 45
Example: BGP PIC with TDM-PW Configuration 46
Example: ATM IMA Configuration 47
Example: ATM over MPLS 47
Cell Packing Configuration Examples 48
VC Mode 48
VP Mode 49
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Contents

Cell Relay Configuration Examples 51
VC Mode 51
VP Mode 52
Example: Ethernet over MPLS 53
CHAPTER 2 Automatic Protection Switching Configuration 57
Automatic Protection Switching 57
Inter Chassis Redundancy Manager 58
Limitations 58
Automatic Protection Switching Interfaces Configuration 59
Configuring a Working Interface 59
Configuring a Protect Interface 60
Configuring Other APS Options 61
Stateful MLPPP Configuration with MR-APS Inter-Chassis Redundancy 63
Monitoring and Maintaining APS 63
CHAPTER 3 Configuring Multi Router Automatic Protection Switching 65
Finding Feature Information 66
Restrictions for MR-APS 66
Information About MR-APS 66
Configuring MR-APS with HSPW-ICRM on a CEM interface 69
Verifying MR-APS 74
Configuration Examples for MR-APS 82
Configuring MR-APS on a POS interface 84
Configuring working node for POS MR-APS 84
Configuring protect node for POS MR-APS 87
Verifying MR-APS on POS interface 91
Configuration Examples for MR-APS on POS interface 93
CHAPTER 4 Hot Standby Pseudowire Support for ATM and TDM Access Circuits 95
Finding Feature Information 95
Prerequisites for Hot Standby Pseudowire Support for ATM and TDM Access Circuits 96
Restrictions for Hot Standby Pseudowire Support for ATM and TDM Access Circuits 96
Information About Hot Standby Pseudowire Support for ATM and TDM Access Circuits 97
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Contents

How the Hot Standby Pseudowire Support for ATM and TDM Access Circuits Feature
Works 97
Supported Transport Types 97
How to Configure Hot Standby Pseudowire Support for ATM and TDM Access Circuits 98
Configuring a Pseudowire for Static VPLS 98
Configuring Hot Standby Pseudowire Support for ATM and TDM Access Circuits 100
Verifying the Hot Standby Pseudowire Support for ATM and TDM Access Circuits
Configuration 102
Configuration Examples for Hot Standby Pseudowire Support for ATM and TDM Access
Circuits 104
Configuring Hot Standby Pseudowire Support for ATM and TDM Access Circuits on CEM
Circuits Example 104
Additional References 105
CHAPTER 5 PPP and Multilink PPP Configuration 107
Limitations 107
PPP and Multilink PPP 108
Point-to-Point Protocol 108
CHAP or PPP Authentication 108
IP Address Pooling 109
Peer Address Allocation 109
Precedence Rules 110
MLP on Synchronous Serial Interfaces 111
How to Configure PPP 111
Enabling PPP Encapsulation 111
Enabling CHAP or PAP Authentication 112
Configuring IP Address Pooling 114
Global Default Address Pooling Mechanism 114
Defining DHCP as the Global Default Mechanism 114
Defining Local Address Pooling as the Global Default Mechanism 116
Controlling DHCP Network Discovery 117
Configuring IP Address Assignment 118
Disabling or Reenabling Peer Neighbor Routes 119
Configuring Multilink PPP 120
Configuring MLP on Synchronous Interfaces 121
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Contents

Configuring a Multilink Group 122
Configuring PFC and ACFC 124
Configuring ACFC 124
Configuring PFC 125
Changing the Default Endpoint Discriminator 126
Creating a Multilink Bundle 128
Assigning an Interface to a Multilink Bundle 129
Configuring PPP/MLP MRRU Negotiation Configuration on Multilink Groups 130
Disabling PPP Multilink Fragmentation 133
Troubleshooting Tips 134
Troubleshooting PPP 134
Monitoring and Maintaining PPP and MLP Interfaces 134
CHAPTER 6 Transparent SONET or SDH over Packet (TSoP) Protocol 135
Prerequisites for TSoP 135
Restrictions for TSoP 135
Information About TSoP Smart SFP 136
Guidelines for TSoP Smart SFP 136
Configuring the Reference Clock 137
Configuration Examples for TSoP 139
Verification Examples 140
Verifying TSoP Smart SFP 140
Verifying Clock Source 141
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CHAPTER 1
Configuring Pseudowire
This chapter provides information about configuring pseudowire (PW) features on the router.
•Pseudowire Overview, page 1
•Limitations, page 7
•Configuring CEM, page 8
•Configuring CAS, page 14
•Configuring ATM, page 17
•Configuring Structure-Agnostic TDM over Packet (SAToP), page 21
•Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN), page 23
•Configuring a Clear-Channel ATM Pseudowire, page 24
•Configuring an ATM over MPLS Pseudowire, page 26
•Configuring an Ethernet over MPLS Pseudowire, page 37
•Configuring Pseudowire Redundancy, page 39
•Pseudowire Redundancy with Uni-directional Active-Active , page 41
•Restrictions , page 42
•Configuring Pseudowire Redundancy Active-Active—Protocol Based, page 43
•Configuring the Working Controller for MR-APS with Pseudowire Redundancy Active-Active, page
43
•Configuring the Protect Controller for MR-APS with Pseudowire Redundancy Active-Active, page 44
•Verifying the Interface Configuration, page 44
•Configuration Examples, page 45
Pseudowire Overview
The following sections provide an overview of pseudowire support on the router.
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Effective Cisco IOS XE Release 3.18S:
•BGP PIC with TDM Pseudowire is supported on the ASR 900 router with RSP2 module.
•BGP PIC for Pseudowires, with MPLS Traffic Engineering is supported on the ASR 900 router with
RSP1 and RSP2 modules.
Starting Cisco IOS XE Release 3.18.1SP, Pseudowire Uni-directional Active-Active is supported on the RSP1
and RSP3 modules.
Limitations
If you are running Cisco IOS XE Release 3.17S, the following limitation applies:
•BGP PIC with TDM Pseudowire is supported only on the ASR 900 router with RSP1 module.
If you are running Cisco IOS XE Release 3.17S and later releases, the following limitations apply:
•Channel associated signaling (CAS) is not supported on the T1/E1 and OC-3 interface modules on the
router.
•BGP PIC is not supported for MPLS/LDP over MLPPP and POS in the core.
•BGP PIC is not supported for Multi-segment Pseudowire or Pseudowire switching.
•BGP PIC is not supported for VPLS and H-VPLS
.
•BGP PIC is not supported for IPv6.
•If BGP PIC is enabled, Multi-hop BFD should not be configured using the bfd neighbor fall-overrbfd
command.
•If BGP PIC is enabled, neighbor ip-address weight weight command should not be configured.
•If BGP PIC is enabled, bgp nexthop trigger delay 6 under the address-family ipv4 command and bgp
nexthop trigger delay 7 under the address-family vpnv4 command should be configured. For
information on the configuration examples for BGP PIC–TDM, see Example: BGP PIC with TDM-PW
Configuration, on page 46.
•If BGP PIC is enabled and the targeted LDP for VPWS cross-connect services are established over BGP,
perform the following tasks:
◦configure Pseudowire-class (pw-class) with encapsulation "mpls"
◦configure no status control-plane route-watch under the pw-class
◦associate the pw-class with the VPWS cross-connect configurations
If you are running Cisco IOS-XE 3.18S, the following restrictions apply for BGP PIC with MPLS TE for
TDM Pseudowire:
•MPLS TE over MLPPP and POS in the core is not supported.
•Co-existence of BGP PIC with MPLS Traffic Engineering Fast Reroute (MPLS TE FRR) is not supported.
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Configuring Pseudowire
Limitations