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Serving gateway S11 reference point statistics
===============================================================================
Peer address : 10.10.2.2
Router : Base
Port : 2123
Create session requests : 1 Create session responses : 1
Delete session requests : 0 Delete session responses : 0
Create bearer requests : 0 Create bearer responses : 0
Delete bearer requests : 0 Delete bearer responses : 0
Update bearer requests : 0 Update bearer responses : 0
Modify bearer requests : 2 Modify bearer responses : 2
Release access bearers req : 1 Release access bearers rsp : 1
Create indirect tunnel req : 0 Create indirect tunnel rsp : 0
Delete indirect tunnel req : 0 Delete indirect tunnel rsp : 0
Downlink notifications Tx : 1 Downlink acks Rx : 1
DL fail notifications Rx : 0 Missing mand IE pkts Rx : 0
Malformed packets Rx : 0 Unknown message pkts Rx : 0
Modify bearer commands : 0 Modify bearer fail ind : 0
Delete bearer commands : 0 Delete bearer fail ind : 0
Bearer resource commands : 0 Bearer resource fail ind : 0
-------------------------------------------------------------------------------
Number of peer instances : 2
Which GTP messages are exchanged?
The Downlink notifications and Modify bearer messages are exchanged over the S11
interface when downlink data is received by the SGW for an Idle UE.
11. On the SGW, verify the EPC procedures being performed.
SGW# show mobile-gateway serving call-flow-stats
===============================================================================
Serving gateway call flow statistics
===============================================================================
Chassis/Card : 1/2 Gateway : 1
Attach procedures : 1 Attach failures : 0
Detach procedures : 0 Detach failures : 0
UE init service req : 1 UE init svc req failures : 0
S1 release procedures : 1 S1 release failures : 0
Inter SGW X2 handovers : 0 Inter SGW X2 HO fails : 0
UE init ded bearer Activatn: 0 UE init ded bearer Act fail: 0
NW init ded bearer Activatn: 0 NW init ded bearer Act fail: 0
NW init ded bearer De-Act : 0 NW init ded br De-Act fail : 0
MME init ded bearer De-Act : 0 MME init ded br De-Act fail: 0
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HSS init QoS modifications : 0 HSS QoS modification fails : 0
Inter SGW idle mode TAU : 0 Inter SGW idle TAU fails : 0
Intra SGW idle mode TAU : 0 Paging timeout expiration : 0
eHRPD to LTE handovers : 0 eHRPD to LTE HO fails : 0
Inter SGW relocation (Out) : 0 Intra SGW idle TAU fails : 0
PDN Sess De-activation : 0 PDN Sess De-act fails : 0
Paging Attempts : 1 Paging fails : 0
Intra SGW X2+S1 handovers : 0 Intra SGW X2+S1 handvr fai*: 0
Intra SGW S1 handvr InTnl : 0 S1 handvr Ind Tunnel fails : 0
Inter MME Idle TAU : 0 Inter MME Idle TAU fails : 0
Inter MME X2+S1 Reloc : 0 Inter MME X2+S1 Reloc fails: 0
Inter MME S1 Reloc Ind Tnl : 0 Inter MME S1 Reloc fails : 0
Inter MME Only Relocations : 0
Attach Proc Piggy Backing : 0 Attach Proc Fail Piggy Bac*: 0
UE init ded bearer deAct : 0 UE init ded br deAct fail : 0
UE init ded bearer modify : 0 UE init ded br modify Fail : 0
NW init bearer modify : 0 NW init bearer modify fail : 0
-------------------------------------------------------------------------------
Number of cards : 1
Notes
Alcatel-Lucent Mobile Gateways for the LTE EPC Lab Guide v1.1 | All rights reserved 2012 Alcatel-Lucent 50/76
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7 Lab 7: UE Handover and Verification
Objective
The objective of this lab is to examine the SGW when a handover procedure is performed for an
attached UE. The student will examine the exchanged signalling messages, the UE state and the
bearer infomation in two handover scenarios: X2-based handover and S1-based handover without SGW
or MME relocation.
Syntax
Commands required for lab section 7.1 are found in Table 12. Each command may have additional
parameters possible. Use the ? character for help and to explore all command line options. Other
commands may also be used, including those found in previous exercises.
Lab 7.1 Command list
clear mobile-gateway serving|pdn 1 ref-point-stats s11|s5|gx
clear mobile-gateway serving|pdn 1 call-flow-stats
show mobile-gateway serving bearer-context imsi detail
show mobile-gateway serving ue-context imsi detail
show mobile-gateway serving ref-point-stats s11
show mobile-gateway serving call-flow-stats
Table 12: Lab 7.1 Commands
7.1 X2 Handover without SGW Relocation
Exercise
1. On the SGW, clear the call flow stats and reference point stats for s11 and s5.
2. The instructor will attach a UE to the network.
On the SGW, display the detailed bearer info.
SGW# show mobile-gateway serving bearer-context imsi 226041000000001 detail
===============================================================================
Bearer context detail
===============================================================================
IMSI : 226041000000001
APN : ipd.alcatel-lucent.com
Bearer Id : 5 Bearer type : Default
Up Time : 0d 00:00:41
QCI/ARP : 9/1
QoS UL MBR : 0 Kbps QoS DL MBR : 0 Kbps
QoS UL GBR : 0 Kbps QoS DL GBR : 0 Kbps
S5 PGW Data TEID : 0x100225 S5 SGW Data TEID : 0x100205
S5 PGW Data addr : 10.10.7.2
S5 SGW Data addr : 10.10.7.1
S1U eNodeB TEID : 0x21 S1U SGW TEID : 0x100225
S1U eNodeB addr : 10.10.2.4
S1U SGW address : 72.22.24.163
S5 UL packets : 48 S5 UL bytes : 2695
S1U DL packets : 49 S1U DL bytes : 68278
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S11 QoS Modify : 0
-------------------------------------------------------------------------------
Number of bearer contexts : 1
Which eNodeB is currently serving the UE?
The UE is currently served by eNodeB 10.10.2.4.
What is the value of the S1U SGW TEID?
The S1U SGW TEID value is 0x100225.
3. Two minutes after the attachment, the tester will trigger an X2 handover for the UE.
On the SGW, display the detailed bearer info.
SGW# show mobile-gateway serving bearer-context imsi 226041000000001 detail
===============================================================================
Bearer context detail
===============================================================================
IMSI : 226041000000001
APN : ipd.alcatel-lucent.com
Bearer Id : 5 Bearer type : Default
Up Time : 0d 00:02:14
QCI/ARP : 9/1
QoS UL MBR : 0 Kbps QoS DL MBR : 0 Kbps
QoS UL GBR : 0 Kbps QoS DL GBR : 0 Kbps [ Pobierz całość w formacie PDF ]