Ue Location Information Support; Lawful Intercept Support; Bulk Statistics Support - Cisco ASR 5000 Administration Manual

▀ Feature Description
address in the "Calling-Station-Id" AVP's format as per RFC 3580, that is the MAC address in ASCII format (upper
case only), with octet values separated by hyphens. For example, "00-10-A4-23-19-C0".
Important:
because the IMEIsV definition only allows values in the range of 0–9. While the MAC address hex values range from
0–F. TBCD encoding used for encoding IMEIsV on GTP allows the range 0–F. Also, when the UE MAC address is
encoded into IMEIsV in TBCD format, MAC address is encoded in the initial six bytes of IMEIsV IE. The last two
bytes get padded with FFFE in TBCD encoding. The last nibble is encoded as 0xE since if the ASR5000 GGSN
encounters F in the last nibble it drops the last byte considering it a filler. As all the 16 ASCII -hex characters have to be
sent to Gx, Gy, and CDR interfaces, the R-eWAG instead encodes the last two bytes as FFFE.
The SN-WLAN-UE-Identifier UE MAC to IMEIsV encoding is CLI controlled. Only if the
CLI command is enabled in the R-eWAG service, mapping will take place and IMEIsV will be sent to the GGSN.
Important:
Therefore, UE Identity Information support is available only if R-eWAG uses the "starent" RADIUS dictionary, if not
R-eWAG will ignore the AVP.

UE Location Information Support

The R-eWAG receives the access point identity information from the Wi-Fi AAA in the optional "SN-WLAN-AP-
Identifier" AVP included in Accounting-Start message from the WLC. The R-eWAG encodes this access point identity
information into ULI IE of Create PDP Context. In Accounting-Interim, if a new AP identifier is provided it is sent to
the GGSN in ULI IE of Update PDP Context. The access point identity is composed of the Location Area Code Cell
Identity (LAC_CI) — that is, Location Area Code (LAC) and Cell Id (CI) separated by an underscore. For example, if
the access point is assigned LAC = 123 and CI = 56789, then SN-WLAN-AP-Identifier AVP will contain 123_56789.
Important:
Therefore, UE Location Information support is available only if R-eWAG uses the "starent" RADIUS dictionary, if not
R-eWAG will ignore the AVP.

Lawful Intercept Support

The Lawful Intercept (LI) functionality provides network operators the ability to intercept control and data messages of
suspicious subscribers. The ASR5000 chassis provides a proprietary interface to third-party Mediation Function (MF) or
Delivery Function (DF), and supports LI for R-eWAG.
For more information on LI support, contact your accounts representative.

Bulk Statistics Support

The system's support for bulk statistics allows operators to choose to view not only statistics that are of importance to
them, but also to configure the format in which it is presented. This simplifies the post-processing of statistical data
since it can be formatted to be parsed by external, back-end processors.
When used in conjunction with the Web Element Manager, the data can be parsed, archived, and graphed.
▄ Cisco ASR 5000 Enhanced Wireless Access Gateway Administration Guide
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Note that R-eWAG's encoding of the UE MAC address into IMEIsV is not standards based. This is
Note that the "SN-WLAN-UE-Identifier" AVP is available only in the "starent" RADIUS dictionary.
Note that the "SN-WLAN-AP-Identifier" AVP is available only in the "starent" RADIUS dictionary.
RADIUS-based Enhanced Wireless Access Gateway Overview
map ue-mac-to-imei