Cisco Cisco ASR 5700 トラブルシューティングガイド

Contents

Introduction

Explanation

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Introduction

This article explains the difference in session counts between show sub and show session
progress commands on an HSGW.

Call ID is the entity used on ASR5K platform to represent a call session. On Packet Data Network
Gateway (PGW), there is a unique Call ID for each Application Point Name (APN) connection for a
particular subscriber International Mobile Session Identifier (IMSI). Conversely, on an eHRPD
Serving Gateway (HSGW), all the APNs share the same Call ID for an IMSI. Since show sub
comma

nds report on a sub-session basis, the counts from this command properly reflect the total

number of APN connections. Conversely, show

session progress reports on a Call ID basis, and

so counts will be lower than compared with PGW and will not reflect the total number of APNs.

Explanation

On a PGW, APN connections are counted separately from one another for the same IMSI for
show subscriber commands and "show session progress". Here is an example of a single
subscriber connected over three different APNs, and therefore assigned three separate Call IDs.
Note the values for the Call IDs can be close in proximity for a given IMSI.

[local]PGW> show sub pgw-only imsi 311480131055555

Tuesday June 09 13:41:24 UTC 2015

+-------Access (W) - pgw-gtp-ipv4 (Y) - pgw-gtp-ipv6

| Type: (Z) - pgw-gtp-ipv4-ipv6 (X) - pgw-pmip-ipv4
| (U) - pgw-pmip-ipv6 (V) - pgw-pmip-ipv4-ipv6

| (.) - Unknown

|
|+------Access (U) - UTRAN (G) - GERAN

|| Tech: (W) - WLAN (N) - GAN
|| (U) - HSPA Evolution (E) - eUTRAN

|| (H) - eHRPD (.) - Unknown
||

||+-----Call (C) - Connected (c) - Connecting
||| State: (d) - Disconnecting (u) - Unknown

|||
|||+----PLMN: (H) - Home (V) - Visiting

|||| (R) - Roaming (u) - Unknown
||||

||||+---Bearer: (D) - Default (E) - Dedicated
||||| Type

|||||
|||||+-Emergency: (A) - Authentic IMSI (U) - Un-Authentic IMSI

|||||| Bearer (O) - Only IMEI (N) - Non-Emergency