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CISCO-DOT11-CONTEXT-SERVICES-CLIENT-MIB by vendor Cisco

CISCO-DOT11-CONTEXT-SERVICES-CLIENT-MIB file content

The SNMP protocol is used to for conveying information and commands between agents and managing entities. SNMP uses the User Datagram Protocol (UDP) as the transport protocol for passing data between managers and agents. The reasons for using UDP for SNMP are, firstly it has low overheads in comparison to TCP, which uses a 3-way hand shake for connection. Secondly, in congested networks, SNMP over TCP is a bad idea because TCP in order to maintain reliability will flood the network with retransmissions.

Management information (MIB) is represented as a collection of managed objects. These objects together form a virtual information base called MIB. An agent may implement many MIBs, but all agents must implement a particular MIB called MIB-II [16]. This standard defines variables for things such as interface statistics (interface speeds, MTU, octets sent, octets received, etc.) as well as various other things pertaining to the system itself (system location, system contact, etc.). The main goal of MIB-II is to provide general TCP/IP management information.

Use ActiveXperts Network Monitor 2019 to import vendor-specific MIB files, inclusing CISCO-DOT11-CONTEXT-SERVICES-CLIENT-MIB.


Vendor: Cisco
Mib: CISCO-DOT11-CONTEXT-SERVICES-CLIENT-MIB  [download]  [view objects]
Tool: ActiveXperts Network Monitor 2019 [download]    (ships with advanced SNMP/MIB tools)
-- *******************************************************************
-- CISCO-DOT11-CONTEXT-SERVICES-CLIENT-MIB.my 
-- May 2003, Raju Datla, Parthasarathy Venkatavaradhan,
-- Prasanna Viswakumar. 
--
-- Copyright (c) 2003, 2004 by Cisco Systems, Inc.
-- All rights reserved.
-- *******************************************************************
--
CISCO-DOT11-CONTEXT-SERVICES-CLIENT-MIB DEFINITIONS ::= BEGIN

IMPORTS 
        MODULE-IDENTITY, 
        OBJECT-TYPE,
        Counter32
                FROM SNMPv2-SMI
        MODULE-COMPLIANCE, 
        OBJECT-GROUP
                FROM SNMPv2-CONF
        TimeInterval
                FROM SNMPv2-TC
        InetAddressType,
        InetAddress
                FROM INET-ADDRESS-MIB
        ciscoExperiment  
                FROM CISCO-SMI;


--********************************************************************
--*  MODULE IDENTITY
--********************************************************************

ciscoDot11CscMIB MODULE-IDENTITY
        LAST-UPDATED    "200406020000Z"
        ORGANIZATION    "Cisco Systems Inc."
        CONTACT-INFO  
               "        Cisco Systems,
                        Customer Service
                        Postal: 170 West Tasman Drive
			San Jose, CA  95134
			USA
                        Tel: +1 800 553-NETS                 
            
                E-mail: cs-dot11@cisco.com"

        DESCRIPTION
                "This MIB is intended to be implemented on all 802.11
                 Access Points and Wireless Bridges that need to
                 participate in the context management process and
                 make use of the services provided by the entities
                 offering WDS and WNS.  The term '802.11 station'
                 refers to one of the Access Point / Wireless Bridge
                 throughout the MIB unless stated otherwise.
                 
                 The hierarchy of the devices offering the wireless
                 domain and network services looks like the following.
                                                      
                             += = = = +
                             |        |
                             |  WNS   |  (Campus level)
                             |        |
                             += = = = +
                             /        \
                            /          \
                           /            \
                          /              \
                         \/              \/
                      += = =+          += = =+
                      |     |          |     | 
                      | WNS |          | WNS |  
                      |     |          |     |
                      += = =+          += = =+
                      /     \                \
                     /       \                \
                    /         \                \
                   /           \                \
                  \/           \/               \/
               +=====+       +=====+          +=====+
               |     |       |     |          |     |
               | WDS |       | WDS |          | WDS | ( Subnet
               |     |       |     |          |     |   level-
               +=====+       +=====+          +=====+   Single
                /  \             \                 \   broadcast 
               /    \             \                 \   domain )
              /      \             \                 \
             /        \             \                 \
            /          \             \                 \
           \/          \/            \/                \/
        +~-~-~+      +~-~-~+       +~-~-~+           +~-~-~+
        +     +      +     +       +     +           +     +
        + AP  +      + AP  +       + AP  +           + AP  +
        +     +      +     +       +     +           +     +
        +~-~-~+      +~-~-~+       +~-~-~+           +~-~-~+
          ..            .             .                 .
         .  .            .             .                 .
        .    .            .             .                 .
       .      .            .             .                 .
      .        .            .             .                 .
     \/        \/           \/            \/                \/
   +.....+  +.....+      +-.-.-.+       +~-~-~+          +......+
   +     +  +     +      +      +       +     +          +      + 
   + MN  +  + MN  +      + WGB  +       + AP  +          +  MN  +
   +     +  +     +      +      +       +     +          +      +
   +.....+  +.....+      +-.-.-.+       +~-~-~+          +......+
                           .             .  .
                          .             .    .
                         .             .      .
                        .             .        .
                       \/            \/        \/
                    ++++++++      +......+   +......+
                    +      +      +      +   +      +
                    + EN   +      +  MN  +   +  MN  +
                    +      +      +      +   +      +
                    ++++++++      +......+   +......+


                The diagram above depicts the overall campus network
                hierarchy and the services being offered at various
                levels in the hierarchy.  Here, authentication
                services for infrastructure nodes are offered by the
                root node, the node providing WNS at the topmost
                (Campus) level.  This node spans an enterprise campus
                that resides in a geographic location.  In this case,
                an 802.11 station performs initial authentication
                with the topmost WNS entity. It also gets the keys
                needed for secure context transfer by communication
                with that entity.

                WNS are offered at various levels as shown in the
                hierarchy to achieve scalability.  WNS at the
                subsequent levels other than the root level include
                authentication services for MNs and are typically
                confined to a single building.

                At the broadcast domain level, the WDS includes
                authentication and registration services for the APs.
                An AP provides proxy authentication and  registration
                services for the MNs.  The APs that connect to parent
                APs through the wireless interface ( as shown by the
                dotted lines ) are Repeater-APs.  The WGBs are managed
                in the same manner as the MNs.  However, the Ethernet
                Nodes ( EN ) that are connected to the WGB won't be
                served as part of the WDS.
                 
                                  GLOSSARY

                Access Point ( AP )

                Any entity that contains an 802.11 medium access
                control ( MAC ) and physical layer ( PHY ) interface
                and provides access to the distribution services via
                the wireless medium for associated clients.

                Wireless Bridge 

                An 802.11 entity that provides wireless connectivity
                between two wired LAN segments and is used in point-
                to-point or point-to-multipoint configurations.

                Mobile Node ( MN )

                A roaming 802.11 wireless device in a wireless
                network associated with an access point.


                WorkGroup Bridge ( WGB )
                
                A work-group bridge is a non-STP AP with an 802.11
                primary port and a secondary Ethernet port that
                provides access to a non-STP secondary Ethernet LAN
                segment.  STP refers to the IEEE 802.1D Spanning Tree
                Protocol.  An 'STP AP' executes the 802.1D STP and
                the 802.1D STP is operated on an 'STP link'.  A
                'non-STP AP' does not execute the 802.1D STP.

                Repeater-AP

                A repeater is a 'wireless AP' that is attached to a
                parent AP on an 802.11 primary port.  The Ethernet
                port is disabled in a Repeater-AP.

                Infrastructure Node ( IN )
                 
                This term refers to Access Points, Wireless Bridges
                and those devices that implement and offer WNS and
                WDS as shown in the network hierarchy.

                Ethernet Node ( EN )
 
                The node that gets the uplink to the Wireless AP
                via the WGB.  This node connects to the WGB through
                its primary Ethernet port.

                Context

                The mobility context for an MN includes its current
                mobility bindings with the APs, IP/802 address
                bindings, cached configuration parameters, QoS state,
                IP group membership, authentication state, accounting
                statistics, and other dynamically derived protocol
                state information.

                Wireless Domain Services

                The set of services being offered at a particular
                broadcast domain that may be an IP subnet or a
                particular VLAN.  The services include the following.

                1. MN security credential caching to provide seamless,
                secure intra-subnet roaming.
                
                2. Authenticated context transfer for roaming client
                within the subnet.

                Since, by definition, the WDS are bound to one subnet
                ( broadcast domain ), if implemented in a device
                spanning multiple subnets, the implementation should
                take care to provide separate set of services for
                each of the subnets.
                               

                Wireless Network Services

                The set of services that can be visualized as being
                offered at various levels other than the lowest
                (subnet) level of a hierarchical campus network.

                At the topmost level, infrastructure authentication
                services for all the devices in the network that
                provide WNS and WDS are offered.  In case if WNS are
                not distributed at several levels as shown in the
                hierarchy above and is confined to be offered only at
                a single topmost level, the services offered also
                include authentication services for the MNs.
                
                WNS Entity

                The logical entity that resides in an infrastructure
                node and offers WNS to the descendants of that
                infrastructure node in the wireless services
                hierarchy.

                WDS Entity

                The logical entity that resides in an infrastructure
                node and offers WDS to the descendants of that
                infrastructure node in the wireless services
                hierarchy.

                WS Entity

                Refers to one of WNS / WDS Entities.

                Parent Node

                The entity that immediately precedes an infrastructure
                node in the hierarchy.  For mobile nodes, the parent
                APs provide proxy wireless services by talking to their
                immediate parent entities providing WDS.

                Root Node

                The entity that is at the highest level in the network 
                hierarchy.  The root node acts as the IN Authenticator
                for the infrastructure nodes.  In case if WNS are not
                distributed, the root node also acts as the Mobile Node
                Authenticator ( See description below ).

                Descendant

                A node that is in the sub-tree of the campus hierarchy
                tree rooted at the node providing WNS at the campus
                level.

                Infrastructure Node ( IN ) Authenticator

                The logical entity that communicates with the AAA
                server and provides authentication services for the
                infrastructure nodes.  Details of the IN Authenticator
                has to be configured in the device providing WDS
                manually.  The AP learns about the IN Authenticator
                automatically upon registering with its immediate
                parent.  The WDS also includes MN authentication
                services if the entity providing WDS is at the
                topmost level in the hierarchy.

                Mobile Node ( MN ) Authenticator

                The logical entity that communicates with the AAA
                server and provides authentication services for mobile
                nodes.  An infrastructure node learns the whereabouts
                of the MN Authenticator from the root node.

                Wireless Network Manager ( WNM )

                The network management system that manages the
                entire hierarchy of devices providing WNS and WDS.

                Advertisement

                The process by which the Access Points identify their
                parent entities providing WDS.  APs listen to the
                advertisements of the WDS entities and gets registered
                with one of those entities to facilitate secured
                context transfer.
 
                WLCCP

                Wireless LAN Context Control Protocol.  Used to
                establish and manage the network topology and
                securely manage the 'operational context' for mobile
                stations in a campus network.                  

                AAA

                Authentication, Authorization, Accounting

                The method by which users are authenticated,
                authorized and tracked to gain access and move about
                inside a network.  A node will request network access
                through an appropriate protocol to an authentication
                server that provides protocols and services for
                providing authentication, authorization and session
                accounting.

                Service Set Identifier ( SSID )

                802.11 Service Set Identifier.  An SSID identifies a
                set of mobile nodes grouped into a logical 'service
                set' and the APs that provide access for the service
                set.

                
                Wireless services at subnet level
                =================================
 
                             +========+
                             |        |
                             |  WDS   | ( Subnet level - Broadcast
                             |        |   domain )
                             +========+
                              /      \
                             /        \
                            /          \
                           /            \
                          /              \
                         \/              \/
                       +~-~-~+         +~-~-~+
                       +     +         +     +
                       + AP  +         + AP  +
                       +     +         +     +
                       +~-~-~+         +~-~-~+
                       .   .               .
                      .     .               .
                     .       .               .
                    .         .               .
                   .           .               .
                  .             .               .
                 \/             \/              \/
              +......+       +-.-.-.+        +~-~-~-+
              +      +       +      +        +      +
              +  MN  +       + WGB  +        +  AP  +
              +      +       +      +        +      +
              +......+       +-.-.-.+        +~-~-~-+


                The above diagram depicts how wireless services are
                being offered in a network rooted at the device
                implementing WDS.  In such a network, the WDS entity
                provides authentication services to both the
                infrastructure and mobile nodes.
               
                An 802.11 station in this hierarchy mentioned above
                performs the following.
 
                1) Provides proxy authentication and registration
                services to the MNs, WGBs and repeater-APs.  The
                station forwards all the authentication and
                registration requests of its clients to its parent
                node offering WDS and acting as the IN Authenticator
                to enable the authentication and registration of its
                clients.

                2) Participates in the election process to elect
                the node that will provide WDS for a particular
                broadcast domain. "

        REVISION      "200406020000Z"
        DESCRIPTION
                "The definition of the object
                 cDot11CscParentWdsAddress has been modified to
                 return a specific error value on certain
                 conditions. " 

        REVISION      "200305060000Z"
        DESCRIPTION
                "Initial version of this MIB module. "
        ::= { ciscoExperiment 109 }


ciscoDot11CscMIBObjects OBJECT IDENTIFIER 
        ::= { ciscoDot11CscMIB 1 }

ciscoDot11CscMIBConformance OBJECT IDENTIFIER 
        ::= { ciscoDot11CscMIB 2 }

ciscoDot11CscConfigGlobal OBJECT IDENTIFIER 
        ::= { ciscoDot11CscMIBObjects 1 }


--********************************************************************
--*  Configuration global parameters  
--********************************************************************

cDot11CscAddressType OBJECT-TYPE
        SYNTAX       InetAddressType
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
                "Represents the type of addresses stored in the
                 objects cDot11CscParentWdsAddress,
                 cDot11CscRootNodeAddress and
                 cDot11CscMnAuthenticatorAddress. "
        ::= { ciscoDot11CscConfigGlobal 1 }


cDot11CscParentWdsAddress OBJECT-TYPE
        SYNTAX            InetAddress
        MAX-ACCESS        read-only
        STATUS            current
        DESCRIPTION
                "The address of the parent WDS entity this 802.11
                 station is  currently registered with.  The type of
                 InetAddress supported by this object is determined
                 by the cDot11CscAddressType object.

                 If cDot11CscOperMode equals 'distributed' and the
                 user credentials are not configured in this 802.11
                 station, a noSuchInstance error is returned.  On all
                 other occasions, when cDot11CscOperMode equals
                 'distributed', the value returned is 0.0.0.0 to
                 indicate that either this node is not registered with
                 a WDS entity or that no parent WDS entity existed
                 when the query was made. "
        ::= { ciscoDot11CscConfigGlobal 2 }


cDot11CscRootNodeAddress OBJECT-TYPE
        SYNTAX           InetAddress
        MAX-ACCESS       read-only
        STATUS           current
        DESCRIPTION 
                "The address of the root node this 802.11 station
                 gets authenticated with.  The type of InetAddress
                 supported by this object is determined by the
                 cDot11CscAddressType object.

                 If the parent WDS entity acts as the root node, this
                 object returns the address of the parent WDS entity.

                 If the hierarchy contains a campus level WNS entity,
                 this object returns the address of that WNS entity. "
        ::= { ciscoDot11CscConfigGlobal 3 }

cDot11CscMnAuthenticatorAddress OBJECT-TYPE
        SYNTAX                  InetAddress
        MAX-ACCESS              read-only
        STATUS                  current
        DESCRIPTION 
                "The address of the Mobile Node Authenticator to
                 which this 802.11 station forwards authentication
                 requests of the mobile nodes attempting to associate
                 with this station.  The type of InetAddress
                 supported by this object is determined by the
                 cDot11CscAddressType object.

                 If the parent WDS entity acts as the root node, so
                 that no WNS entity is present in the network
                 hierarchy, this object returns the address of the
                 parent WDS entity.

                 If the parent WDS entity has the root WNS entity as
                 its immediate parent, this object returns the 
                 address of the root WNS entity.

                 If the WDS entity has a WNS entity, that is not the
                 root node, as its immediate parent, this object
                 returns the address of that WNS entity. "
        ::= { ciscoDot11CscConfigGlobal 4 }


cDot11CscOperMode  OBJECT-TYPE
        SYNTAX     INTEGER { infrastructure(1), distributed(2) }
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
                "The current mode of operation of this 802.11
                 station.

                 The semantics for this object are as follows.

                 infrastructure - An 802.11 station operates in the
                 'infrastructure' mode if it discovers a WDS
                 entity through advertisement messages and registers
                 with it.

                 distributed - If the 802.11 station couldn't
                 discover a WDS entity or has lost contact with the
                 its parent WDS entity, then the station operates in
                 the 'distributed' mode.  However, the station
                 listens for the advertisement messages from the WDS
                 entity in the background to get back to the
                 'infrastructure' mode. "
        ::= { ciscoDot11CscConfigGlobal 5 }


cDot11CscMnInactivityTime OBJECT-TYPE
        SYNTAX            TimeInterval
        MAX-ACCESS        read-only
        STATUS            current
        DESCRIPTION 
                "The maximum time a mobile node can remain
                 associated with this 802.11 station without sending
                 a frame. "
        ::= { ciscoDot11CscConfigGlobal 6 }


cDot11CscRegistrationLifeTime OBJECT-TYPE
        SYNTAX                TimeInterval
        MAX-ACCESS            read-only
        STATUS                current
        DESCRIPTION 
                "The maximum time after which the registration of
                 this 802.11 station with its parent WDS entity
                 expires. "
        ::= { ciscoDot11CscConfigGlobal 7 }


cDot11CscStateTransitions OBJECT-TYPE
        SYNTAX           Counter32
        MAX-ACCESS       read-only
        STATUS           current
        DESCRIPTION 
                "This object counts the number of times this 802.11
                 station has transitioned between the infrastructure
                 and distributed modes since the last reboot. "
        ::= { ciscoDot11CscConfigGlobal 8 }


--********************************************************************
--*  End of 802.11 station Global Configuration parameters
--********************************************************************

                                         
--********************************************************************
--   Conformance information
--********************************************************************

ciscoDot11CscMIBCompliances OBJECT IDENTIFIER 
        ::= { ciscoDot11CscMIBConformance 1 }
ciscoDot11CscMIBGroups OBJECT IDENTIFIER 
        ::= { ciscoDot11CscMIBConformance 2 }


--********************************************************************
--*    Compliance statements  
--********************************************************************

ciscoDot11CscMIBCompliance MODULE-COMPLIANCE
        STATUS     current
        DESCRIPTION
                "The compliance statement for the SNMP entities that
                 implement the ciscoDot11CscMIB module. "
        MODULE MANDATORY-GROUPS {
                ciscoDot11CscConfigGlobalGroup
             } 
        ::= { ciscoDot11CscMIBCompliances 1 }


--********************************************************************
--*    Units of conformance  
--********************************************************************

ciscoDot11CscConfigGlobalGroup OBJECT-GROUP
        OBJECTS {
                cDot11CscAddressType,  
                cDot11CscParentWdsAddress,
                cDot11CscRootNodeAddress,
                cDot11CscMnAuthenticatorAddress,
                cDot11CscOperMode,
                cDot11CscMnInactivityTime,
                cDot11CscRegistrationLifeTime,
                cDot11CscStateTransitions
             }                
        STATUS     current
        DESCRIPTION
                "This collection of objects provide information about
                 this  802.11 station's parent WDS, its mode of
                 operation, the address of the IN/MN authenticators,
                 its registration life time and the number of times
                 the station has switched between the two modes. "
        ::= { ciscoDot11CscMIBGroups 1 }


--********************************************************************
--*   End of units of conformance  
--********************************************************************

END