This chapter describes how to display and modify PNNI node configurations, including the PNNI timers, and how to monitor the link status of neighboring peers.
Note AtmDirector provides configuration capability at the node level, but not at the switch level. Switch configuration is provided by CiscoView. For details, select
Help>CiscoView from the CWSI main window.
From the Node Configuration and Information window in the PNNI topology, you can perform the following tasks related to node configurations:
The Node Configuration and Information window provides identifying information for the selected node and shows which configuration options are enabled.
To display the configuration for a PNNI a node, follow these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration and Information window opens (Figure 12-1). The information in this window is described in Table 12-1.
Figure 12-1: Node Configuration and Information Window
Step 4 To display the settings of the PNNI timers for this node, click PNNI Timers. For a description of this window, see "Viewing the Values of the PNNI Timers."
Step 5 Click Close when you have the read the node configuration.
Table 12-1: Node Configuration and Information Field Descriptions
| Field
| Description
|
|---|
| PNNI Node Name
| Node name that is distributed to other nodes via PNNI flooding. The default node name for a lowest level node is the host name of the switching system.
|
| ATM Address
| ATM address of the selected node.
|
| PNNI Node ID
| 22-byte address prefixed with the ATM address of the switch. This ID uniquely identifies the node in a PNNI network.
|
| Domain Name
| Name of the PNNI domain in which this node resides.
|
| # Neighboring Peers
| Count of the neighboring nodes at this peer level.
|
| Peer Group ID
| Peer group identifier of the peer group to which this node belongs.
|
| Lowest Level
| Indicates whether this node acts as a lowest level node or whether this node is a logical group node that represents a group of nodes in the next level up.
|
| Restricted Transit
| Specifies whether the node is restricted so that it does not allow support of SVCs transiting this node. Transit calls are calls originating from another ATM switch and passing through the switch. Some edge switches might want to eliminate this transit traffic and only allow traffic originating or terminating at this switch.
|
| Node Configuration
|
|
| Administrative Status
| Indicates whether the administrative status of the node is up or down. When the node is up, it is allowed to become active; when the node is down, it is forced to be inactive.
|
| Auto Summary
| Indicates whether this node is configured for automatic address summarization.
|
| Level
| The level of PNNI hierarchy at which this node exists. This value is used to determine the default node ID and the default peer group ID for this node. The LightStream 1010 has a default value of 56. This indicates that the first 7 bytes of the switch address are significant. Addresses with a PNNI scope greater than 56 are not advertised by this node. The value of the PNNI level must be within nibble boundaries.
|
| Redistributed Static Routes
| Specifies whether redistribution of ATM static routes to the PNNI routing domain is enabled. Redistribution instructs PNNI to distribute reachability information from non-PNNI sources throughout the PNNI routing domain. Exterior static routes are advertised in exterior-reachable address PTSEs; internal static routes are advertised in internal-reachable address PTSEs. The LightStream 1010 ATM switch supports redistribution of static routes, such as those configured on IISP interfaces. Static redistribution is enabled by default.
|
You can change the configuration parameters in the Node Configuration area of the Node Configuration and Information window.
To modify the configuration of a PNNI node, follow these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration & Information window opens (Figure 12-1).
Step 4 Make any desired changes to the following parameters:
- Level
- Auto Summary
- Redistributed Static Routes
For a description of these parameters, refer to Table 12-1.
Step 5 To modify the settings of the PNNI timers for this node, click PNNI Timers. See "Modifying the Values of the PNNI Timers."
Step 6 Click Apply to update the agent with your changes.
Note When you modify the node configuration and click OK, the administrative status of the node is temporarily set to down. This results in flushing all of the topology exchanges.
From the PNNI Timers Config window you can access the configured values for the PNNI timers for a node. These are the timeout values used by the node for transmitting and receiving topology information. The PNNI Timers Config window allows you to:
You access the PNNI timers information from the Node Configuration and Information window for that node.
To display the PNNI timers for a node, follow these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration & Information window opens (Figure 12-1).
Step 4 Click PNNI Timers.
The PNNI Timers Config window opens (Figure 12-2). The information contained in this window is described in Table 12-2.
Figure 12-2: PNNI Timers Config Window
Step 5 Click OK when you have read the PNNI timers.
Table 12-2: PNNI Timers Config Field Descriptions:
| Field
| Description
|
|---|
| PTSE Refresh Interval
| The initial value for the refresh timer that this node uses to drive origination or re-origination of PTSEs in the absence of triggered updates. Updates are triggered by significant topology changes. Default value is 1800; valid range is 30-1800.
|
| PTSE Lifetime Factor
| The value for the lifetime multiplier, expressed as a percentage. The node uses the refresh interval multiplied by this value to determine the initial lifetime for self-originated PTSEs. Default value is 200; valid range is 101-1000.
|
| PTSE Hold Down
| The initial value for the PTSE hold-down timer that the node uses to limit the rate at which it can re-originate PTSEs. The hold-down timer is used to ensure that PNNI topology state packets (PTSPs) are not sent at unacceptably high rates. Default value is 10; valid range is 1-100.
|
| RXmt Interval
| The period between retransmissions of unacknowledged database summary packets, PTSE request packets, and PTSPs. Default value is 5; valid range is 5-60.
|
| Peer Delay ACK Interval
| The minimum amount of time between transmissions of delayed PTSE acknowledgment packets. Default value is 10; valid range is 10-100.
|
| AvCR Minimum Threshold
| The minimum threshold used in the algorithms that determine significant change for available cell rate parameters, expressed as a percentage. Available cell rate is a measure of the available bandwidth in cells per second, per traffic class. Default value is 3; valid range is 1-99.
|
| AvCR Multiplier
| The proportional multiplier used in the algorithms that determine significant change for available cell rate parameters, expressed as a percentage. Default value is 50; valid range is 1-99.
|
| Hello Interval
| The initial value of the hello timer. In the absence of triggered hellos, the node sends one hello packet on each of its ports at this interval. Default value is 15; valid range is 1-300.
|
| Hello Inactivity Factor
| The value for the hello inactivity factor that this node uses to determine when a neighbor has gone down. Default value is 5.
|
| Hello Hold Down
| The initial value for the hello hold-down timer that the node uses to limit the rate at which it sends hellos. Default value is 10; valid range is 1-100.
|
| CDV Multiplier
| The proportional multiplier used in the algorithms that determine significant change for cell delay variation metrics, expressed as a percentage. Default value is 25; valid range is 1-99.
|
| CTD Multiplier
| The proportional multiplier used in the algorithms that determine significant change for cell transfer delay metrics, expressed as a percentage. Default value is 50; valid range is 1-99.
|
To modify the PNNI timers, you access the PNNI timers information from the Node Configuration and Information window for that node.
To modify the PNNI timers for a node, follow these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select a node in the topology map.
Step 3 Select PNNI Options>Node Config & Information.
The PNNI Node Configuration & Information window opens (Figure 12-1).
Step 4 Select Down for the Administrative Status.
When the administrative status of the node is up, the configuration cannot be modified.
Step 5 Click PNNI Timers.
The PNNI Timers Config window opens (Figure 12-2).
Step 6 Click the up and down arrows to the right of the fields to make any desired changes in the values of the timers.
The fields in this window, their functions, default values, and valid ranges are described in Table 12-2.
Step 7 Click Apply to accept your changes and close the PNNI Timers Config window.
Step 8 Click Apply in the Node Configuration and Information window to apply your changes to the agent and close the window.
Note Modifying the values of the PNNI timers has a significant effect on the network. Only knowledgeable persons should modify these values.
The Neighboring Peer window provides link and status information for a node and its neighboring peer nodes.
To display neighboring peer information, follow these steps:
Step 1 Display the PNNI topology by double-clicking a PNNI domain or peer group name in the AtmDirector main window.
Step 2 Select one node, then hold down the shift key to select a second node.
Step 3 Select PPNI Options>Neighboring Peer.
The link and state information for the selected nodes is displayed in the Neighboring Peer window (Figure 12-3). The fields in this window are described in Table 12-3.
Figure 12-3: Neighboring Peer Window
Step 4 Click OK when you have read the neighboring peer information.
Table 12-3: Neighboring Peer Field Descriptions
| Field
| Description
|
|---|
| Local Node
| The selected local node.
|
| Remote Node
| List of neighboring peer node names.
|
| State
| State of the neighboring peer node as seen by this node.
|
| # of Links
| Number of links configured between the selected node and the remote node.
|
| Links
|
|
| Local Port
| Port identifier on the local node for this link.
|
| Flood
| Indicates whether the port is being used for transmission of flooding and database synchronization information to the neighboring peer.
|
| Link Selection
| Specifies a method for selecting this link from multiple links to the same neighboring node.
|
