Direct Tunnel
Direct Tunnel Configuration ▀
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
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Step 6
Save your configuration to flash memory, an external memory device, and/or a network location using the Exec mode
command
save configuration
. For additional information on how to verify and save configuration files, refer to the
System Administration Guide
and the
Command Line Interface Reference
.
Step 7
Check that your configuration changes have been saved by using the sample configuration found in the
Verifying the
SGSN Direct Tunnel Configuration
section in this chapter.
Enabling Setup of GTP-U Direct Tunnels
The SGSN determines whether a direct tunnel can be setup and by default the SGSN doesn’t support direct tunnel.
Example Configuration
Enabling direct tunnel setup on an SGSN is done by configuring direct tunnel support in a call-control profile.
config
call-control-profile
<policy_name>
direct-tunnel attempt-when-permitted
end
Notes:
A call-control profile must have been previously created, configured, and associated with a previously created,
configured, and valid operator policy. For information about operator policy creation/configuration, refer to the
Operator Policy
chapter in this guide.
Direct tunnel is now allowed on the SGSN but will only setup if allowed on both the destination node and the
RNC.
Enabling Direct Tunnel per APN
In each operator policy, APN profiles are configured to connect to one or more GGSNs and to control the direct tunnel
access to that GGSN based on call filtering by APN. Multiple APN profiles can be configured per operator policy.
By default, APN-based direct tunnel functionality is
allowed
so any existing direct tunnel configuration must be
removed to return to default and to ensure that the setup has not been restricted.
Example Configuration
The following is an example of the commands used to ensure that direct tunneling, to a GGSN(s) identified in the APN
profile, is enabled:
config
apn-profile
<profile_name>
remove direct tunnel
end
Notes:
