Cisco Cisco ASR 5500

Cisco

NAT Administration Guide, StarOS Release 16 ▄

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CONTENTS

About this Guide ............................................................................................... vii

Conventions Used .................................................................................................................................. viii

Supported Documents and Resources ....................................................................................................ix

Related Common Documentation ....................................................................................................... ix

Related Product Documentation ..................................................................................................... ix

Obtaining Documentation ............................................................................................................... ix

Contacting Customer Support .................................................................................................................. x

Network Address Translation Overview ......................................................... 11

NAT Overview ........................................................................................................................................ 12

Qualified Platforms ............................................................................................................................. 13

License Requirements........................................................................................................................ 13

NAT Realms ....................................................................................................................................... 13

NAT IP Pool Groups ........................................................................................................................... 15

NAT IP Address Allocation and Deallocation ..................................................................................... 15

NAT IP Address Allocation............................................................................................................. 16

NAT IP Address Deallocation ........................................................................................................ 16

NAT Port-chunk Allocation and Deallocation ..................................................................................... 16

NAT Port-chunk Allocation ............................................................................................................. 16

NAT Port-chunk Deallocation ........................................................................................................ 17

NAT IP Address/Port Allocation Failure ......................................................................................... 17

TCP 2MSL Timer ................................................................................................................................ 17

Flow Mapping Timer ........................................................................................................................... 18

NAT Binding Records ......................................................................................................................... 18

NAT Binding Updates ......................................................................................................................... 19

CoA NAT Query ............................................................................................................................. 20

Firewall-and-NAT Policy ..................................................................................................................... 20

Disabling NAT Policy ..................................................................................................................... 21

Updating Firewall-and-NAT Policy in Mid-session ......................................................................... 22

Target-based NAT Configuration ................................................................................................... 22

NAT Application Level Gateway ......................................................................................................... 23

Supported NAT ALGs .................................................................................................................... 23

H323 ALG Support ......................................................................................................................... 23

NAT Aware H323 Clients ................................................................................................................... 24

EDRs and UDRs ................................................................................................................................ 24

EDRs .............................................................................................................................................. 24

UDRs .............................................................................................................................................. 25

Bulk Statistics ..................................................................................................................................... 25

Alarms ................................................................................................................................................ 26

Session Recovery and ICSR .............................................................................................................. 26

NAT64 Overview ................................................................................................................................ 28

NAT64 Translation ......................................................................................................................... 29

NAT64 ALGs Support .................................................................................................................... 30

ICMP Host Unreachable .................................................................................................................... 30

Port Control Protocol Support ............................................................................................................ 30

Bulk Statistics Support ................................................................................................................... 31