Kamailio I-CSCF – SRV Lookup Behaviour

Recently I had a strange issue I thought I’d share. Using Kamailio as an Interrogating-CSCF, Kamailio was getting the S-CSCF details from the User-Authorization-Answer’s “Server-Name” (602) AVP. The value was set to: But the I-CSCF was only looking up A-Records for, not using DNS-SRV. The problem? The Server-Name I had configured as a […]

Notes Software Uncategorized

Ubuntu Cloned VMs getting Duplicate IPs (and yes – the MAC Addresses are unique)

Short mystery regarding cloned Ubuntu VMs with different MAC Addresses being allocated the same IP Addresses by DHCP.

EPC GSM LTE Mobile Networks Uncategorized

Getting TEID up with GTP Tunnels

What’s the deal with Tunnel Endpoint Identifiers and what do they do?