Supported X-Headers - Cisco ASR 5000 Series Administration Manual

▀ Enhanced Features and Functionality
 Packet size limit is 2400 bytes, if due to header insertion packet size exceeds this limit, behavior is
unpredictable.
 Only those x-header fields in header portion of application protocol that begin with "x-" are parsed at HTTP
analyzer. In URL and data portion of HTTP any field can be parsed.
The following are limitations to insertion and encryption of x-header fields in WSP headers:
 x-header fields are not inserted in IP fragmented packets.
 In case of concatenated request, x-header fields are only inserted in first GET or POST request (if rule matches
for the same). X-header fields are not inserted in the second or later GET/POST requests in the concatenated
requests. For example, if there is ACK+GET in packet, x-header is inserted in the GET packet. However, if
GET1+GET2 is present in the packet and rule matches for GET2 and not GET1 x-header is still inserted in
GET2. In case of GET+POST also, x-header is not inserted in POST.
 In case of CO, x-header fields are not inserted if the WTP packets are received out of order (even after proper re-
ordering).
 If route to MMS is present, x-headers are not inserted.
 x-headers are not inserted in WSP POST packet when header is segmented. This is because POST contains
header length field which needs to be modified after addition of x-headers. In segmented WSP headers, header
length field may be present in one packet and header may complete in another packet.
 x-headers are not inserted in case of packets buffered at DCCA.

Supported X-Headers

This section provides information on the different x-headers supported by ECS.
ECS supports insertion of various x-header fields in the HTTP/WSP GET and POST request packets. The x-headers are
inserted at the end of the HTTP/WSP header.
The following bearer-related x-headers are supported:
 3gpp
The following 3GPP associated fields are supported:
 apn
 charging-characteristics
 charging-id
 imei
 imsi
 qos
 rat-type
 s-mcc-mnc
 sgsn-address
 acr
 customer-id
 ggsn-address
 mdn
▄ Cisco ASR 5x00 Enhanced Charging Services Administration Guide
62
Enhanced Charging Service Overview