A management station can use this MIB module for the 
        maintenance of persistent topology information of the 
        PNNI network. Previously, a management station had to 
        query the network to retrieve the network topology via 
        an Integrated Local Management Interface (ILMI) link.  
        The nodes that are down or the nodes whose ILMI-enabled 
        links are down will not be included in the topology. To 
        rectify this limitation, the concept of persistent
        topology is used. 
        The persistent topology feature requires the following:
        - a node configured to be the gateway node
        - PNNI links between the nodes
        - node and feeder database.
        A Gateway Node, for the purpose of this MIB module, is 
        defined to be a node that is capable of maintaining a 
        persistent topology database based on the PNNI Topology 
        State Elements (PTSEs) sent by the other nodes in the 
        PNNI peer group. The topology database is persistent
        across reboots.  
        A feeder, in the context of this MIB, is defined as 
        an ATM switch which does not have PNNI feature. It is 
        connected to a node(with PNNI feature, therefore 
        with routing capability) through a physical link. (The 
        provisioning of the feeder and the link are beyond 
        the scope of this MIB.) When a feeder and the link  
        are provisioned, the feeder will update the routing  
        node with its information(for example: feeder name,  
        the feeder's port ifIndex etc.). The routing node will  
        group these feeder information along with its own 
        information(for example: its node identifier, its feeder
        port's information etc.) and send it to other nodes 
        in the peer group in the PTSE. Upon receiving this
        PTSE, each node will update its database. The same actions
        are repeated when some information are modified on 
        the feeder. A network management station can retrieve  
        these information from a Gateway Node's database. In the
        case of a feeder failure, or a feeder is removed
        from the network, or the feeder's routing node failure,
        the feeder's corresponding entry in the database will
        not be removed. The only way to remove an entry from
        the database is for the network management station to
        delete this entry explicitly.
        A link, in the context of this MIB, is defined as 
        a PNNI link between two PNNI nodes. 
        (a) The nodal information for each node in the peer group 
        stored in the persistent topology database includes: 
        - node id
        - node name
        - Primary IP address
        - Secondary IP address
        - system object identifier
        - gateway node flag (a flag which indicates whether the 
          node is configured to be a Gateway Node)
        Each node in a peer group has its own entry in the 
        (b) The feeder information for each feeder in the peer group
        stored in the persistent topology database includes:
        - Routing node ID(local node ID)
        - A local port's 'ifIndex' which identifies the
          port the feeder is connected to on the routing
        - The feeder's 'shelf, slot, port' numbers which
          identifies the port on the feeder itself.
        - The protocol type that is used on the link.
        - The name of the feeder.
        - The LAN IP address of the feeder.
        - The ATM IP address of the feeder.
        - The model number of the feeder which identifies
          the type of the feeder.
        Each feeder in a peer group has its own entry in the 
        (c) The link information for each node in the peer group 
        stored in the persistent topology database includes: 
        - local node's id, 
        - local node port's ifIndex and corresponding physical 
        - remote node's id
        - remote node port's ifIndex and corresponding physical 
        Each link in a peer group has its own entry in the 
        The concept of peer groups is defined by 
        PNNI, and each peer group contains at least one node. 
        The persistent topology database only contains 
        nodal information for the nodes in a particular 
        peer group, because the Gateway Nodes extract the 
        nodal information from PNNI PTSEs, and the PTSEs  
        are flooded only within a peer group.  
        The persistent topology database is used by a management 
        station to discover the topology of the network 
        irrespective of the state and reachability of the
        nodes in that network.
        The information in the topology database will not 
        be deleted automatically. The information can only 
        be deleted by the network operator as an administrative 
        measure. This is to ensure that even if a node has gone 
        down, its information will still be in the topology 
        database until it is deleted by the network operator. 
        An outside link is a link that connects to a lowest-level
        outside node. In contrast to an inside link (i.e.,
        horizontal link) or an uplink, an outside link does not
        form part of the PNNI topology, and is therefore not used
        in path computation.

Imported Objects

InetAddressType, InetAddressINET-ADDRESS-MIB
TEXTUAL-CONVENTION, TruthValue, TimeStamp, RowStatusSNMPv2-TC
ciscoWanTopologyMIB .
ciscoWanTopologyMIBNotifs .
cwtConfigGatewayStatus .
cwtLinkInfoModify .
cwtLinkInfoDelete .
cwtTopoInfoAdd .
cwtTopoInfoModify .
cwtTopoInfoDelete .
cwtTopoDbFull .
cwtFeederInfoAdd .
cwtFeederInfoModify .
cwtFeederInfoDelete .
cwtLinkInfoAdd .
ciscoWanTopologyMIBObjects .
cwtSystemGroup .
cwtGatewayAdminStatus .
cwtGatewayNodeOperStatus .
cwtDBLastChange .
cwtNodalInfoGroup .
cwtNodeInfoTable .
cwtNodeInfoEntry .
cwtIndex .
cwtSecIPIfName .
cwtSecIPAddrType .
cwtSecIP .
cwtSysObjId .
cwtNodeInfoTimeOutFlag .
cwtRowStatus .
cwtGatewayNodeFlag .
cwtNodeId .
cwtNodeName .
cwtPrimIPIfType .
cwtPrimIPIfName .
cwtPrimIPAddrType .
cwtPrimIP .
cwtSecIPIfType .
cwtFeederInfoGroup .
cwtFeederInfoTable .
cwtFeederInfoEntry .
cwtFeederIndex .
cwtFeederName .
cwtFeederLanIPAddrType .
cwtFeederLanIP .
cwtFeederAtmIPAddrType .
cwtFeederAtmIP .
cwtFeederModelNumber .
cwtFeederRowStatus .
cwtLocalNodeId .
cwtLocalIfIndex .
cwtLocalIfName .
cwtFeederShelf .
cwtFeederSlot .
cwtFeederPort .
cwtFeederLMIType .
cwtFeederType .
cwtLinkInfoGroup .
cwtLinkInfoTable .
cwtLinkInfoEntry .
cwtLinkIndex .
cwtLinkRowStatus .
cwtLinkLocalNodeId .
cwtLinkRemoteNodeId .
cwtLinkLocalIfIndex .
cwtLinkRemoteIfIndex .
cwtLinkLocalPhysicalId .
cwtLinkRemotePhysicalId .
cwtLinkInfoTimeOutFlag .
cwtLinkOutsideLink .
cwtMIBConformance .
cwtMIBCompliances .
cwtMIBGroups .