▀ Contents
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
viii
License Requirements ...................................................................................................................... 232
Enabling CoA and DM ...................................................................................................................... 232
Enabling CoA and DM .................................................................................................................. 233
CoA and DM Attributes ................................................................................................................ 233
CoA and DM Error-Cause Attribute ............................................................................................. 234
Viewing CoA and DM Statistics ................................................................................................... 235
Session Redirection (Hotlining) ............................................................................................................ 238
Overview ........................................................................................................................................... 238
License Requirements ................................................................................................................. 238
Operation .......................................................................................................................................... 238
ACL Rule ...................................................................................................................................... 238
Redirecting Subscriber Sessions ................................................................................................. 238
Session Limits On Redirection ..................................................................................................... 239
Stopping Redirection .................................................................................................................... 239
Handling IP Fragments ................................................................................................................ 239
Recovery ...................................................................................................................................... 239
AAA Accounting ........................................................................................................................... 239
Viewing the Redirected Session Entries for a Subscriber ................................................................ 239
Direct Tunnel ................................................................................................... 245
Direct Tunnel Feature Overview ........................................................................................................... 246
Direct Tunnel Configuration .................................................................................................................. 250
Configuring Direct Tunnel Support on the SGSN ............................................................................. 250
Enabling Setup of GTP-U Direct Tunnels .................................................................................... 251
Enabling Direct Tunnel per APN .................................................................................................. 251
Enabling Direct Tunnel per IMEI .................................................................................................. 252
Enabling Direct Tunnel to Specific RNCs .................................................................................... 252
Verifying the SGSN Direct Tunnel Configuration ......................................................................... 253
Configuring S12 Direct Tunnel Support on the S-GW ...................................................................... 255
GRE Protocol Interface ................................................................................... 257
Introduction ........................................................................................................................................... 258
Supported Standards ............................................................................................................................ 259
Supported Networks and Platforms ...................................................................................................... 260
Licenses ................................................................................................................................................ 261
Services and Application on GRE Interface ......................................................................................... 262
How GRE Interface Support Works ...................................................................................................... 263
Ingress Packet Processing on GRE Interface .................................................................................. 263
Egress Packet Processing on GRE Interface .................................................................................. 265
GRE Interface Configuration................................................................................................................. 266
Virtual Routing And Forwarding (VRF) Configuration ...................................................................... 266
GRE Tunnel Interface Configuration ................................................................................................ 267
Enabling OSPF for VRF ................................................................................................................... 268
Associating IP Pool and AAA Group with VRF ................................................................................ 268
Associating APN with VRF ............................................................................................................... 269
Static Route Configuration ............................................................................................................... 269
Verifying Your Configuration ................................................................................................................. 270
Gx Interface Support ...................................................................................... 273
Rel. 6 Gx Interface ................................................................................................................................ 274
Introduction ....................................................................................................................................... 274
Supported Networks and Platforms ............................................................................................. 274
License Requirements ................................................................................................................. 275
Supported Standards ................................................................................................................... 275
How it Works .................................................................................................................................... 275