Cellular Network Infrastructure » Core Network (CN) » OsmoGGSN (former OpenGGSN)

In a scenario where the UE configuration is unknown, we therefore do not know the APN configuration yet would like to support PS service regardless for all phones on the network.

Currently we can set a default-apn in the vty config, but that has to be a certain type;

Assuming a default config like in the example distributed with osmo-ggsn, we'll have three APNS, "internet", "inet6" and "inet46"
and the default is "internet" which has

type-support v4

If in the device config, the APN name is gprs.provider.name we will not match and we will use the default

The UE may request End User Address Type IPv4/IPv6 (according to the APN protocol field in the APN setup in the device).

Then we fail with:

DGGSN DEBUG PDP(262420000000222:5): Processing create PDP context request for APN 'gprs.provider.name' (ggsn.c:447)                                             
DGGSN ERROR PDP(262420000000222:5): APN doesn't support requested EUA / AF type (ggsn.c:591)                                                          
DGGSN INFO PDP(262420000000222:5): Deleting PDP context (ggsn.c:354)