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Cisco Security Appliance Command Line Configuration Guide
OL-10088-01
Chapter 25 Configuring Application Layer Protocol Inspection
GTP Inspection
Verifying and Monitoring GTP Inspection
To display GTP configuration, enter the show service-policy inspect gtp command in privileged EXEC
mode. For the detailed syntax for this command, see the command page in the Cisco Security Appliance
Command Reference.
Use the show service-policy inspect gtp statistics command to show the statistics for GTP inspection.
The following is sample output from the show service-policy inspect gtp statistics command:
hostname# show service-policy inspect gtp statistics
GPRS GTP Statistics:
version_not_support 0 msg_too_short 0
unknown_msg 0 unexpected_sig_msg 0
unexpected_data_msg 0 ie_duplicated 0
mandatory_ie_missing 0 mandatory_ie_incorrect 0
optional_ie_incorrect 0 ie_unknown 0
ie_out_of_order 0 ie_unexpected 0
total_forwarded 0 total_dropped 0
signalling_msg_dropped 0 data_msg_dropped 0
signalling_msg_forwarded 0 data_msg_forwarded 0
total created_pdp 0 total deleted_pdp 0
total created_pdpmcb 0 total deleted_pdpmcb 0
pdp_non_existent 0
You can use the vertical bar (|) to filter the display. Type ?| for more display filtering options.
Use the show service-policy inspect gtp pdp-context command to display PDP context-related
information. The following is sample output from the show service-policy inspect gtp pdp-context
command:
hostname# show service-policy inspect gtp pdp-context detail
1 in use, 1 most used, timeout 0:00:00
Version TID MS Addr SGSN Addr Idle APN
v1 1234567890123425 10.0.1.1 10.0.0.2 0:00:13 gprs.cisco.com
user_name (IMSI): 214365870921435 MS address: 1.1.1.1
primary pdp: Y nsapi: 2
sgsn_addr_signal: 10.0.0.2 sgsn_addr_data: 10.0.0.2
ggsn_addr_signal: 10.1.1.1 ggsn_addr_data: 10.1.1.1
sgsn control teid: 0x000001d1 sgsn data teid: 0x000001d3
ggsn control teid: 0x6306ffa0 ggsn data teid: 0x6305f9fc
seq_tpdu_up: 0 seq_tpdu_down: 0
signal_sequence: 0
upstream_signal_flow: 0 upstream_data_flow: 0
downstream_signal_flow: 0 downstream_data_flow: 0
RAupdate_flow: 0
The PDP context is identified by the tunnel ID, which is a combination of the values for IMSI and
NSAPI. A GTP tunnel is defined by two associated PDP contexts in different GSN nodes and is
identified with a Tunnel ID. A GTP tunnel is necessary to forward packets between an external packet
data network and a MS user.
You can use the vertical bar (|) to filter the display, as in the following example:
hostname# show service-policy gtp statistics | grep gsn