Cisco Cisco Packet Data Gateway (PDG) 故障排查指南

Cisco

Cisco ASR 5000 Series Network Address Translation Administration Guide ▄

OL-22992-01

C

ONTENTS

About this Guide ................................................................................................. v

Conventions Used .................................................................................................................................................... vi

Contacting Customer Support ............................................................................................................................... viii

Network Address Translation Overview ........................................................... 9

Supported Platforms and Products ......................................................................................................................... 10

Licenses .................................................................................................................................................................. 11

Supported Standards ............................................................................................................................................... 12

NAT Feature Overview .......................................................................................................................................... 13

NAT Realms ...................................................................................................................................................... 14

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

NAT IP Address Allocation and Deallocation ................................................................................................... 16

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

NAT IP Address Deallocation ...................................................................................................................... 17

NAT Port-chunk Allocation and Deallocation .................................................................................................. 17

NAT Port-chunk Allocation .......................................................................................................................... 17

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

NAT IP Address/Port Allocation Failure ...................................................................................................... 18

TCP 2MSL Timer .............................................................................................................................................. 18

NAT Binding Records ....................................................................................................................................... 19

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

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

Firewall-and-NAT Policy .................................................................................................................................. 21

Disabling NAT Policy................................................................................................................................... 22

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

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

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

Supported NAT ALGs .................................................................................................................................. 24

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

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

UDRs ............................................................................................................................................................ 24

Bulk Statistics .................................................................................................................................................... 24

Alarms ............................................................................................................................................................... 25

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

How NAT Works ................................................................................................................................................... 28

NAT Configuration ............................................................................................ 33

Before You Begin ................................................................................................................................................... 34

Configuring the System .......................................................................................................................................... 35

Configuring NAT ................................................................................................................................................... 36

Enabling the ECS Subsystem and Creating the ECS Service ............................................................................ 37

Configuring Port Maps ...................................................................................................................................... 37

Configuring Host Pools ..................................................................................................................................... 38

Configuring IMSI Pools .................................................................................................................................... 38

Configuring Access Ruledefs ............................................................................................................................ 39

Configuring NAT IP pools/NAT IP Pool Groups .............................................................................................. 40

Configuring One-to-One NAT IP Pools /NAT IP Pool Groups .................................................................... 40