Multi-homing APNs in GPRS/UMTS

wcbasquin wcbasquin at yahoo.com
Sun Jun 6 23:43:38 UTC 2004


Regarding APNs that exist on many GGSNs: When a SGSN resolves an APN
name into a GGSN IP address is it normal for the DNS server to return
multiple IP addresses?  Can SGSNs maintain a list of several IP
addresses for a specific APN?

Or does the DNS server maintain the list of IP addresses for the APN
and just return a single IP address using round-robin selection?

If APNs are mulithomed then some sort of redundancy or load balancing
can be implemented.  Should the TTL for the APN be set to 0?


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