From 8e01a9d06fbabadf1621cb5592b3f6d1026d92d2 Mon Sep 17 00:00:00 2001 From: ikostov Date: Fri, 6 Jan 2017 14:34:45 +0100 Subject: SGSN: add Auth. policy, NS Statistics and BSSGP state examples, tweaks Add semicoli in fig-gprs-pcubts digraph. Remove section from GMM Implementation about non-existence of HLR. The SGSN can access osmo-hlr via GSUP (and will have to do so in the libvlr future). Change-Id: I0164f418e453672321eed00bbc454c1e223ea158 --- OsmoSGSN/chapters/configuration.adoc | 37 ++++++++++++++++++++++++++++++++++++ OsmoSGSN/chapters/overview.adoc | 28 ++++++++++----------------- common/chapters/gb.adoc | 28 ++++++++++++++++++++++++--- 3 files changed, 72 insertions(+), 21 deletions(-) diff --git a/OsmoSGSN/chapters/configuration.adoc b/OsmoSGSN/chapters/configuration.adoc index 8b259ed..a933d1b 100644 --- a/OsmoSGSN/chapters/configuration.adoc +++ b/OsmoSGSN/chapters/configuration.adoc @@ -67,6 +67,43 @@ OsmoSGSN(config-sgsn)# grx-dns-add 1.2.3.4 <3> <2> Enable the dynamic GGSN resolving mode <3> Specify the IP address of a DNS server for APN resolution +[[auth-pol]] +=== Authorization Policy + +Authorization determines whether a particular subscriber can access +your network or not. + +The following 4 authorization policy options are available: + +`accept-all`: All IMSIs will be accepted. + +`acl-only`: Accept only IMSIs, which are explicitly white-listed +by the Access Control List (ACL), and the rest will be rejected. + +`closed`: Accept only home network subscribers. +The combination of MCC and MNC fully identifies a subscriber's +home network, also known as a Home Network Identity (HNI, i.e. +MCC and MNC found at the start of the IMSI, e.g. MCC 901 and +MNC 700 with IMSI 901700000003080). The ACL is also heeded. + +`remote`: GSUP protocol is used to remotely access a HLR. +Only remote subscription data will be used. + +.Example: Assign or change authorization policy: +---- +OsmoSGSN> enable +OsmoSGSN# configure terminal +OsmoSGSN(config)# sgsn +OsmoSGSN(config-sgsn)# auth-policy acl-only <1> +OsmoSGSN(config-sgsn)# write <2> +Configuration saved to sgsn.cfg +OsmoSGSN(config-sgsn)# end +OsmoSGSN# disable +OsmoSGSN> +---- +<1> 'acl-only' is selected as authorization policy +<2> Saves current changes to cofiguration to make this policy +persistent === Subscriber Configuration diff --git a/OsmoSGSN/chapters/overview.adoc b/OsmoSGSN/chapters/overview.adoc index 566124a..2ff92fa 100644 --- a/OsmoSGSN/chapters/overview.adoc +++ b/OsmoSGSN/chapters/overview.adoc @@ -23,16 +23,16 @@ OsmoNITB/OsmoBSC/OsmoBTS, the PCU is co-located within the BTS. [graphviz] ---- digraph G { - rankdir=LR; - MS0 [label="MS"] - MS1 [label="MS"] - MS0->BTS [label="Um"] - MS1->BTS [label="Um"] - BTS->BSC [label="Abis"] - BSC->MSC [label="A"] - BTS->PCU [label="pcu_sock"] - PCU->SGSN [label="Gb"] - SGSN->GGSN [label="GTP"] + rankdir=LR; + MS0 [label="MS"]; + MS1 [label="MS"]; + MS0->BTS [label="Um"]; + MS1->BTS [label="Um"]; + BTS->BSC [label="Abis"]; + BSC->MSC [label="A"]; + BTS->PCU [label="pcu_sock"]; + PCU->SGSN [label="Gb"]; + SGSN->GGSN [label="GTP"]; } ---- @@ -68,14 +68,6 @@ The GPRS Mobility Management implementation is quite simplistic at this point. It supports the GPRS ATTACH and GPRS ROUTING AREA UPDATE procedures, as well as GPRS ATTACH and GPRS DETACH. -However, as the SGSN currently does not implement any type of HLR -access, it is not able to authenticate a subscriber or even check if the -subscriber exists at all. As such, all non-roaming subscribes are -allowed to attach to OsmoSGSN. Non-roaming means that the first 5 -digits of the IMSI must match the MCC and MNC of the cell that the -subscriber is registering to. - - ==== LLC Implementation The LLC (Logical Link Control) implementation of OsmoSGSN only supports diff --git a/common/chapters/gb.adoc b/common/chapters/gb.adoc index d01fa9b..199ef2c 100644 --- a/common/chapters/gb.adoc +++ b/common/chapters/gb.adoc @@ -67,14 +67,36 @@ OsmoSGSN> show ns Encapsulation NS-UDP-IP Local IP: 127.0.0.1, UDP Port: 23000 Encapsulation NS-FR-GRE-IP Local IP: 0.0.0.0 ---- -FIXME -FIXME: show ns stats +.Example: Inspecting NS statistics +---- +OsmoSGSN> show ns stats +Encapsulation NS-UDP-IP Local IP: 10.9.1.198, UDP Port: 23000 +Encapsulation NS-FR-GRE-IP Local IP: 0.0.0.0 +NSEI 101, NS-VC 101, Remote: BSS, ALIVE UNBLOCKED, UDP 10.9.1.119:23000 + NSVC Peer Statistics: + Packets at NS Level ( In): 1024 (2/s 123/m 911/h 0/d) + Packets at NS Level (Out): 1034 (0/s 151/m 894/h 0/d) + Bytes at NS Level ( In): 296638 (1066/s 22222/m 274244/h 0/d) + Bytes at NS Level (Out): 139788 (0/s 48225/m 91710/h 0/d) + NS-VC Block count : 0 (0/s 0/m 0/h 0/d) + NS-VC gone dead count : 0 (0/s 0/m 0/h 0/d) + NS-VC replaced other count: 0 (0/s 0/m 0/h 0/d) + NS-VC changed NSEI count : 0 (0/s 0/m 0/h 0/d) + NS-VCI was invalid count : 0 (0/s 0/m 0/h 0/d) + NSEI was invalid count : 0 (0/s 0/m 0/h 0/d) + ALIVE ACK missing count : 0 (0/s 0/m 0/h 0/d) + RESET ACK missing count : 0 (0/s 0/m 0/h 0/d) + NSVC Peer Statistics: + ALIVE reponse time : 0 ms +---- .Example: Inspecting BSSGP state ---- +OsmoSGSN> show bssgp +NSEI 101, BVCI 2, RA-ID: 1-2-1-0, CID: 0, STATE: UNBLOCKED +NSEI 101, BVCI 0, RA-ID: 0-0-0-0, CID: 0, STATE: UNBLOCKED ---- -FIXME FIXME: show nse -- cgit v1.2.3